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Human Body Block > Muscles > Flashcards

Muscles Flashcards

1
Q

Erector spinae

A

location - deep muscle of the back

attachments - from sacrum, lumbar & thoracic supraspinous lig., sacrotuberous lig. to costal angles (iliocostalis), ribs & transverse processes (longissimus), and spinous processes (spinalis)

actions - extension & lateral flexion of the vertebral column

innervation - dorsal rami of spinal nerves

blood supply - dorsal branches of intercostal, subcostal, lumbar and lateral sacral arteries

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2
Q

Semispinalis (transversospinalis)

A

location - deep muscle of the back

attachments- from transverse processes to distant superior spinous processes

actions - extension & contralateral rotation of the vertebral column

innervation - dorsal rami of spinal nerves

blood supply - dorsal branches of intercostal, subcostal, lumbar and lateral sacral arteries

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3
Q

Multifidus and rotatores (transversospinalis)

A

location - deep muscle of the back

attachments - from transverse process to more superior spinous processes

actions - stabilizes vertebrae, and assists with extension & rotation of the vertebral column

innervation - dorsal rami of spinal nerves

blood supply - dorsal branches of intercostal, subcostal, lumbar and lateral sacral arteries

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4
Q

Iliacus

A

location - anterior femoral muscle

attachments - from iliac fossa, to the lesser trochanter of the femur

actions - flexes thigh and stabilizes hip joint

innervation - femoral nerve & lumbar plexus branches

blood supply - iliolumbar, deep circumflex femoral, femoral & obturator a.

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5
Q

Psoas

A

location - anterior femoral muscle

attachments - from anterior lumbar transverse processes vertebral bodies & discs to the lesser trochanter of the femur

actions - flexes thigh and stabilizes hip joint

innervation - ventral rami L1-3

blood supply - lumbar, iliolumbar, obturator, external iliac, femoral a.

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6
Q

Rectus femoris (L2, 3, 4)

A

location - anterior femoral muscle

attachments - from anterior inferior iliac spine and groove superior to the acetabulum to the base of the patella

actions - flexes thigh, and extends leg

innervation - femoral nerve

blood supply - femoral, lateral circumflex femoral

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7
Q

Sartorius

A

location - anterior femoral muscle

attachments - from anterior superior iliac spine to the medial aspect of the proximal tibia

actions - flexes, abducts & laterally rotates thigh, and flexes leg

innervation - femoral nerve

blood supply - femoral, lateral circumflex femoral & descending genicular

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8
Q

Tensor fasciae latae

A

location - anterior femoral muscle

attachments - from anterior superior iliac spine & adjacent iliac crest to iliotibial tract

actions - abducts, flexes & medially rotates thigh, and assists in maintaining extended leg

innervation - superior gluteal nerve

blood supply - lateral circumflex femoral (ascending), superior gluteal & superficial circumflex iliac a.

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9
Q

Vastus intermedius (L2, 3, 4)

A

location - anterior femoral muscle

attachments - from the anterior aspect of the proximal 2/3rds of the femoral shaft to the base of the patella

actions - extends leg

innervation - femoral nerve

blood supply - femoral & profunda femoral a.

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10
Q

Vastus lateralis (L2, 3, 4)

A

location - anterior femoral muscle

attachments - from lateral/posterior femur to the lateral border of the patella

actions - extends leg

innervation - femoral nerve

blood supply - lateral circumflex femoral (descending), femoral, & 1st perforating

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11
Q

Vastus medialis (L2, 3, 4)

A

location - anterior femoral muscle

attachments - from medial/posterior femur to the medial border of the patella

actions - extends leg

innervation - femoral nerve

blood supply - femoral, profunda femoral & descending genicular a.

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12
Q

Adductor brevis

A

location - medial femoral muscle

attachments - from inferior pubic ramus to proximal posterior femur

actions - adducts thigh

innervation - obturator nerve

blood supply - profunda femoral, medial circumflex femoral & obturator a.

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13
Q

Adductor longus

A

location - medial femoral muscle

attachments - from pubic crest to midshaft posterior femur

actions - adducts & flexes thigh

innervation - obturator nerve

blood supply - profunda femoral, medial circumflex femoral, femoral & descending genicular a.

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14
Q

Adductor magnus

A

location - medial femoral muscle

attachments - from ischial tuberosity to posterior femur & adductor tubercle

actions - adducts (adductor part) & extends (hamstring part) thigh

innervation - obturator nerve (adductor region) & tibial division (hamstring region) of the sciatic nerve

blood supply - femoral, profunda femoral, obturator & descending genicular a.

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15
Q

Gracilis

A

location - medial femoral muscle

attachments - from inferior pubic ramus to the proximal, medial tibia

actions - flexes & medially rotates the leg, and adducts thigh

innervation - obturator nerve

blood supply - profunda femoral & femoral a.

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16
Q

Pectineus

A

location - medial femoral muscle

attachments - from superior pubic ramus to proximal posterior femoral shaft

actions - adducts & flexes thigh

innervation - femoral nerve & accessory obturator nerve when this nerve is present

blood supply - medial circumflex femoral, femoral & obturator a.

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17
Q

Obturator externus

A

location - medial femoral muscle

attachments - from the external aspect of rim of obturator foramen to the trochanteric fossa

actions - laterally rotates thigh

innervation - obturator nerve

blood supply - obturator & medial circumflex femoral a.

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18
Q

Gemellus inferior

A

location - muscle of the gluteal region

attachments - from the ischial tuberosity to the obturator internus tendon

actions - laterally rotates thigh

innervation - nerve to the quadratus femoris

blood supply - medial circumflex femoral a.

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19
Q

Gemellus superior

A

location - muscle of the gluteal region

attachments - from the ischial spine to the obturator internus tendon

actions - laterally rotates thigh

innervation - nerve to the obturator internus

blood supply - inferior gluteal, internal pudendal

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20
Q

Gluteus maximus

A

location - muscle of the gluteal region

attachments - from the aponeurosis of the erector spinae, sacrum, sacrotuberous ligament & gluteal surface of ilium to gluteal tuberosity of the femur & the iliotibial tract

actions - extends & laterally rotates thigh, & tenses fascia lata (iliotibial tract)

innervation - inferior gluteal nerve

blood supply - inferior gluteal, superior gluteal, 1st perforating, medial circumflex femoral

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21
Q

Gluteus medius

A

location - muscle of the gluteal region

attachments - from the external iliac surface to the lateral aspect of the greater trochanter

actions - abducts & medially rotates thigh; and keeps the pelvis level when opposite leg is raised

innervation - superior gluteal nerve

blood supply - superior gluteal & lateral circumflex femoral (ascending) a.

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22
Q

Gluteus minimis

A

location - muscle of the gluteal region

attachments - from the external iliac surface to the anterolateral aspect of the greater trochanter

actions - abducts & medially rotates thigh; and keeps the pelvis level when opposite leg is raised

innervation - superior gluteal nerve

blood supply - superior gluteal & lateral circumflex femoral (ascending) a.

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23
Q

Obturator internus

A

location - muscle of the gluteal region

attachments - from the anterolateral wall of the pelvis, obturator foramen & obturator membrane to the medial surface of the greater trochanter

actions - laterally rotates thigh

innervation - nerve to the obturator internus

blood supply - obturator & internal pudendal a.

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24
Q

Piriformis

A

location - muscle of the gluteal region

attachments - from the anterolateral sacrum to the upper border of the greater trochanter

actions - abducts & laterally rotates thigh

innervation - branches of the lumbosacral plexus

blood supply - lateral sacral, superior gluteal & internal pudendal a.

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25
Q

Quadratus femoris

A

location - muscle of the gluteal region

attachments - from the ischial tuberosity to the quadrate tubercle of the femur

actions - laterally rotates thigh

innervation - nerve to the quadratus femoris

blood supply - medial circumflex femoral & inferior gluteal a.

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26
Q

Biceps femoris

A

location - posterior femoral muscle

attachments - from the ischial tuberosity (long head) & distal posterior/lateral femur (short head) to the fibular head

actions - flexes leg (both heads) & extends thigh (long head only)

innervation - tibial (long head) & peroneal (short head) divisions of the sciatic nerve

blood supply - perforating branches of profunda femoral a & lateral superior genicular a.

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27
Q

Semimembranosus

A

location - posterior femoral muscle

attachments - from ischial tuberosity to posterior aspect of the medial tibial condyle

actions - extends thigh & flexes leg

innervation - tibial division of the sciatic nerve

blood supply - perforating branches of profunda femoral a

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28
Q

Semitendinosus

A

location - posterior femoral muscle

attachments - from the ischial tuberosity to the proximal, medial tibia

actions - extends thigh & flexes leg

innervation - tibial division of the sciatic nerve

blood supply - perforating branches of profunda femoral, medial circumflex femoral

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29
Q

Extensor digitorum longus

A

location - anterior crural muscle

attachments - from the lateral tibial condyle, proximal fibula and interosseous membrane to the dorsal digital expansions of toes 2-5

actions - dorsiflexes ankle, and extends digits 2-5 (IP & MP)

innervation - deep peroneal nerve

blood supply - anterior tibial & perforating branch of the peroneal a.

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30
Q

Extensor hallucis longus

A

location - anterior crural muscle

attachments - from the mid-fibula & interosseous membrane to the distal phalangeal base of the 1st toe

actions - dorsiflexes ankle, and extends great toe (MP & IP)

innervation - deep peroneal nerve

blood supply - anterior tibial & perforating branch of peroneal a.

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31
Q

Peroneus tertius

A

location - anterior crural muscle

attachments - from the distal fibula and interosseous membrane to the base of the 5th metatarsal

actions - dorsiflexes ankle, and everts foot

innervation - deep peroneal nerve

blood supply - anterior tibial, perforating branch of peroneal & arcuate a.

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32
Q

Tibialis anterior

A

location - anterior crural muscle

attachments - from the lateral condyle and proximal lateral tibia & interosseous membrane to the medial cuneiform & adjacent 1st metatarsal

actions - dorsiflexes ankle, and inverts foot

innervation - deep peroneal nerve

blood supply - anterior tibial a.

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33
Q

Peroneus longus

A

location - lateral crural muscle

attachments - from the head & proximal fibula to the lateral aspects of the 1st metatarsal & adjacent medial cuneiform

actions - plantar flexes ankle, and everts foot

innervation - superficial peroneal nerve

blood supply - anterior tibial, peroneal a.

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34
Q

Peroneus brevis

A

location - lateral crural muscle

attachments - from the distal fibula to the lateral base of the 5th metatarsal

actions - plantar flexes ankle, and everts foot

innervation - superficial peroneal nerve

blood supply - anterior tibial, peroneal a.

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35
Q

Flexor digitorum longus

A

location - posterior crural muscle

attachments - from the posterior tibia distal to the soleal line to the plantar surfaces of the distal phalangeal bases

actions - plantar flexes ankle, and flexes digits 2-5 (MP & IP)

innervation - tibial nerve

blood supply - posterior tibial a.

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36
Q

Flexor hallucis longus

A

location - posterior crural muscle

attachments - from the distal posterior fibular surface & interosseous membrane to the plantar aspect of the distal phalangeal base of the 1st toe

actions - plantar flexes ankle, and flexes great toe (MP & IP)

innervation - tibial nerve

blood supply - posterior tibial & peroneal a.

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37
Q

Gastrocnemius (S1,2)

A

location - posterior crural muscle

attachments - from the posterior aspect of the femoral condyles (lateral epicondyle & popliteal surface) to the calcaneal tuberosity

actions - flexes leg, and plantar flexes ankle

innervation - tibial nerve

blood supply - medial & lateral sural a.

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38
Q

Plantaris

A

location - posterior crural muscle

attachments - from the lateral supracondylar line (popliteal surface) to the calcaneal tuberosity

actions - flexes leg, and plantar flexes ankle

innervation - tibial nerve

blood supply - medial & lateral inferior genicular a.

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39
Q

Popliteus

A

location - posterior crural muscle

attachments - from the lateral femoral condyle to the soleal line of the tibia

actions - unlocks knee during (initial) flexion

innervation - tibial nerve

blood supply - medial & lateral inferior genicular a.

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40
Q

Soleus (S1,2)

A

location - posterior crural muscle

attachments - from the posterior proximal fibula & tibial soleal line to the calcaneal tuberosity

actions - plantar flexes ankle

innervation - tibial nerve

blood supply - popliteal, posterior tibial & peroneal a.

41
Q

Tibialis posterior

A

location - posterior crural muscle

attachments - from the interosseous membrane, lateral tibia & medial fibula to the medial tarsals & metatarsals

actions - plantar flexes ankle, and inverts foot

innervation - tibial nerve

blood supply - posterior tibial & peroneal a.

42
Q

Abductor digiti minimi

(lower extremity)

A

location - muscle of the foot

attachments - from calcaneal tuberosity to lateral side of proximal phalangeal base of 5th digit

actions - abducts & flexes 5th digit

innervation - lateral plantar nerve

blood supply - lateral plantar

43
Q

Abductor hallucis

A

location - muscle of the foot

attachments - from medial calcaneal tuberosity to medial side of proximal phalangeal base of great toe

actions - flexes & abducts great toe

innervation - medial plantar nerve

blood supply - medial plantar, medial maleollar & 1st plantar metatarsal a.

44
Q

Adductor hallucis

A

location - muscle of the foot

attachments - from 2-4th metatarsal bases (oblique head) & distal ends of 3-5 metatarsal (transverse head) to lateral base of proximal phalanx of great toe

actions - adducts great toe

innervation - lateral plantar nerve

blood supply - medial plantar, lateral plantar, plantar arch & 4th metatarsal a.

45
Q

Extensor digitorum brevis

(lower extremity)

A

location - muscle of the foot

attachments - from anterolateral calcaneus to the lateral sides of tendons of extensor digitorum longus (2-4, or 2- 5)

actions - extension of digits 2-5 (MP & IP)

innervation - deep peroneal nerve

blood supply - dorsalis pedis & arcuate a.

46
Q

Extensor hallucis brevis

A

location - muscle of the foot

attachments - from anterolateral calcaneus to dorsal aspect of base of proximal phalanx of the hallux

actions - extension of great toe (MP)

innervation - deep peroneal nerve

blood supply - dorsalis pedis & arcuate a.

47
Q

Flexor digitorum accessorius

A

location - muscle of the foot

attachments - from medial surface of calcaneus & lateral process of calcaneal tuberosity to long flexor tendons

actions - assists flexor digitorum longus

innervation - lateral plantar nerve

blood supply - medial & lateral plantar a. & plantar arch

48
Q

Flexor digitorum brevis

(lower extremity)

A

location - muscle of the foot

attachments - from medial process of calcaneal tuberosity to sides of intermediate phalanges of digits 2-5

actions - flexes toes (proximal IP)

innervation - medial plantar nerve

blood supply - medial & lateral plantar, & plantar metatarsal a.

49
Q

Flexor digiti minimi

(lower extremity)

A

location - muscle of the foot

attachments - from 5th metatarsal base to proximal phalangeal base

actions - flexion of 5th digit (MP)

innervation - lateral plantar nerve

blood supply - lateral plantar a.

50
Q

Flexor hallucis brevis

A

location - muscle of the foot

attachments - from cuboid & tendon of tibialis posterior to base of proximal phalanx of great toe

actions - flexion of great toe (MP)

innervation - medial plantar nerve

blood supply - medial plantar, 1st plantar metatarsal, lateral plantar & plantar arch

51
Q

Interossei-dorsal

(lower extremity)

A

location - muscle of the foot

attachments - from metatarsal shafts to proximal phalangeal bases & dorsal digital expansions of digits 2-4

actions - abducts (MP) & flexes (MP) & extends (IP) digits 2-4

innervation - lateral plantar nerve

blood supply - arcuate, lateral & medial tarsal, dorsal metatarsal & dorsal digital a.

52
Q

Interossei-plantar

A

location - muscle of the foot

attachments - from plantar surface of shaft of metatarsals to dorsal digital expansions of digits 3-5

actions - adducts & flexes (MP) & extends (IP) digits 3-5

innervation - lateral plantar nerve

blood supply - lateral plantar, plantar arch & plantar metatarsal a.

53
Q

Lumbricals

(lower extremity)

A

location - muscles of the foot

attachments - from tendons of flexor digitorum longus to medial sides of dorsal expansions of digits 2-5

actions - flexes proximal phalanges (MP), and extend IP joints

innervation - 1st- medial plantar nerve & 2-4- lateral plantar nerve

blood supply - lateral plantar, plantar arch & plantar metatarsal a.

54
Q

Latissimus dorsi

A

location - muscle connecting upper extremity to the trunk

attachments - from lower thoracic spinous processes, thoracolumbar fascia & iliac crest to the medial lip of the intertubercular sulcus of the humerus

actions - humeral adduction, extension & medial rotation

innervation - thoracodorsal nerve

blood supply - thoracodorsal a.

55
Q

Levator scapulae (C4-5)

A

location - muscle connecting upper extremity to the trunk

attachments - from the upper cervical transverse processes to the superior angle of scapula

actions - elevation & inferior rotation of the lateral angle of the scapula

innervation - dorsal scapular nerve

blood supply - deep branch of transverse cervical, vertebral a.

56
Q

Pectoralis major

A

location - muscle connecting upper extremity to the trunk

attachments - from clavicle, costal cartilages, sternum to the lateral lip of the intertubercular sulcus of the humerus

actions - humeral adduction, flexion & medial rotation

innervation - medial & lateral pectoral nerves

blood supply - thoroacromial a.

57
Q

Pectoralis minor

A

location - muscle connecting upper extremity to the trunk

attachments - from ribs 3-5 to the coracoid process of the scapula

actions - scapular protraction & assists with depression of the shoulder (assists with forced inspiration [with scapular fixation])

innervation - medial & lateral pectoral nerves

blood supply - thoracoacromial, superior thoracic & lateral thoracic a.

58
Q

Rhomboids (C4-5)

A

location - muscle connecting upper extremity to the trunk

attachments - from the lower cervical & upper thoracic spinous processes to the medial border of the scapula

actions - scapular retraction & inferior rotation of the lateral angle

innervation - dorsal scapular nerve

blood supply - deep branch of transverse cervical & dorsal branches of posterior intercostal a.

59
Q

Serratus anterior (C5-7)

A

location - muscle connecting upper extremity to the trunk

attachments - from the upper 8-10 ribs to the deep, medial border of the scapula

actions - scapular protraction & upward rotation of the lateral angle of the scapula

innervation - long thoracic nerve

blood supply - lateral thoracic, superior thoracic, thoracodorsal & deep branch of transverse cervical a.

60
Q

Trapezius

A

location - muscle connecting upper extremity to the trunk

attachments - from the superior nuchal line, external occipital protuberance, ligamentum nuchae, & cervical & thoracic spinous processes to the clavicle, acromion & scapular spine

actions - scapular elevation, depression, retraction & superior rotation of the lateral angle

innervation - accessory nerve (motor innervation) & C3-5 (sensory)

blood supply - occipital (upper), superficial branch of transverse cervical (middle) and deep branch of transverse cervical (lower) a.

61
Q

Deltoid

A

location - scapular muscle

attachments - from the clavicle, acromion & spine of the scapula to the deltoid tuberosity of the humerus

actions - humeral flexion, medial rotation, abduction, extension & lateral rotation

innervation - axillary nerve

blood supply - thoracoacromial, posterior circumflex humeral, anterior humeral circumflex, profunda brachii a.

62
Q

Subscapularis

A

location - scapular muscle

attachments - from the subscapular fossa to the lesser tubercle of the humerus

actions - stabilizes the glenohumeral joint, and medially rotates & adducts humerus

innervation - upper & lower subscapular nerves

blood supply - subscapular, axillary a.

63
Q

Supraspinatus

A

location - scapular muscle

attachments - from the supraspinous fossa to the greater tubercle of the humerus

actions - initiates humeral abduction

innervation - suprascapular nerve (C5,6)

blood supply - suprascapular & superficial branch of transverse cervical a.

64
Q

Teres major

A

location - scapular muscle

attachments - from the inferior angle of the scapula to the medial lip of the intertubercular sulcus of the humerus

actions - humeral adduction & medial rotation

innervation - lower subscapular nerve

blood supply - thoracodorsal, posterior humeral circumflex a.

65
Q

Infraspinatus (C5-6)

A

location - scapular muscle

attachments - from the infraspinous fossa to the greater tubercle of the humerus

actions - stabilizes glenohumeral joint, and lateral rotation of humerus

innervation - suprascapular nerve

blood supply - suprascapular, circumflex scapular a.

66
Q

Teres minor (C5-6)

A

location - scapular muscle

attachments - from the lateral border of the scapula to the greater tubercle of the humerus

actions - stabilizes glenohumeral joint, and lateral rotation of humerus

innervation - axillary nerve

blood supply - circumflex scapular, posterior circumflex humeral a.

67
Q

Biceps brachii (C5,6)

A

location - muscle of the arm

attachments - from coracoid process (short head) and supraglenoid tubercle (long head) of the scapula to the radial tuberosity & the deep antebrachial fascia (through the bicipital aponeurosis)

actions - flexion of the arm & forearm, & supination of the forearm

innervation - musculocutaneous nerve

blood supply - brachial, anterior circumflex humeral a.

68
Q

Brachialis

A

location - muscle of the arm

attachments - from the distal anterior shaft of the humerus to the coronoid process & ulnar tuberosity

actions - flexion of the forearm

innervation - musculocutaneous & radial nerves

blood supply - brachial, radial collateral, & inferior ulnar collateral a.

69
Q

Coracobrachialis

A

location - muscle of the arm

attachments - from the coracoid process to the proximal medial shaft of the humerus

actions - flexion & adduction of arm

innervation - musculocutaneous nerve

blood supply - axillary, anterior circumflex humeral a.

70
Q

Triceps (C7,8)

A

location - muscle of the arm

attachments - from the infraglenoid tubercle of the scapula (long head), & proximal posterolateral (lateral head) & distal posteromedial (medial) shaft of the humerus to the olecranon process of the ulna

actions - extension of the arm (long head) & extension of the forearm (long, lateral & medial heads)

innervation - radial nerve

blood supply - axillary, profunda brachii, posterior circumflex humeral & superior ulnar collateral a.

71
Q

Abductor pollicis longus

A

location - muscle of the forearm

attachments - from proximal posterior radius, ulna & interosseous membrane to the anterior base of the 1st metacarpal & trapezium

actions - abducts and extends thumb at carpometacarpal joint

innervation - radial nerve

blood supply - radial, posterior interosseous & perforating anterior interosseous a.

72
Q

Brachioradialis

A

location - muscle of the forearm

attachments - from the lateral supracondylar ridge of the humerus to the distal radius adjacent to the styloid process

actions - flexes forearm

innervation - radial nerve

blood supply - radial recurrent, radial collateral & radial a.

73
Q

Extensor carpi radialis brevis

A

location - muscle of the forearm

attachments - from the lateral epicondyle of the humerus (common extensor origin) to the base of the 3rd metacarpal

actions - extends & abducts hand at wrist

innervation - radial nerve

blood supply - radial recurrent & radial a.

74
Q

Extensor carpi radialis longus

A

location - muscle of the forearm

attachments - from the lateral supracondylar ridge of the humerus to the base of the 2nd metacarpal

actions - extends & abducts hand at wrist

innervation - radial nerve

blood supply - radial recurrent, radial collateral & radial a.

75
Q

Extensor carpi ulnaris

A

location - muscle of the forearm

attachments - from the lateral epicondyle of the humerus (common extensor origin) to the base of the 5th metacarpal

actions - extends & adducts hand at wrist

innervation - radial nerve

blood supply - radial recurrent & posterior interosseous a.

76
Q

Extensor digitorum

(upper extremity)

A

location - muscle of the forearm

attachments - from the lateral epicondyle of the humerus (common extensor origin) to the extensor expansions of digits 2-5

actions - extends phalanges (MP) and hand at wrist

innervation - radial nerve

blood supply - radial recurrent, posterior interosseous a.

77
Q

Extensor digiti minimi

(upper extremity)

A

location - muscle of the forearm

attachments - from the lateral epicondyle of the humerus (common extensor origin) to the digital expansion of the 5th digit

actions - extends 5th digit (MP & IP)

innervation - radial nerve

blood supply - radial recurrent, posterior interosseous a.

78
Q

Extensor indicis

A

location - muscle of the forearm

attachments - from the posterior surface of the ulna & interosseous membrane to the digital expansion of the 2nd digit

actions - extends 2nd digit (MP & IP)

innervation - radial nerve

blood supply - posterior interosseous a.

79
Q

Extensor pollicis brevis

A

location - muscle of the forearm

attachments - from the posterior radial surface & interosseous membrane to the base of the 1st proximal phalanx

actions - extends thumb (MP)

innervation - radial nerve

blood supply - posterior interosseous & perforating anterior interosseous a.

80
Q

Extensor pollicis longus

A

location - muscle of the forearm

attachments - from the middle 1/3rd of the posterior surface of the ulna & interosseous membrane to the base of the 1st distal phalanx

actions - extends thumb (MP & IP)

innervation - radial nerve

blood supply - posterior interosseous & perforating anterior interosseous a.

81
Q

Flexor carpi radialis

A

location - muscle of the forearm

attachments - from the medial epicondyle (common flexor origin) to the palmar aspect of the bases of the 2nd & 3rd metacarpals

actions - flexes & abducts hand at wrist

innervation - median nerve

blood supply - anterior ulnar recurrent & radial a.

82
Q

Flexor carpi ulnaris

A

location - muscle of the forearm

attachments - from the medial epicondyle (common flexor origin) of the humerus and proximal ulnar shaft to the pisiform

actions - flexes & adducts hand at wrist

innervation - ulnar nerve

blood supply - posterior ulnar recurrent, ulnar & inferior ulnar collateral a.

83
Q

Flexor digitorium profundus

A

location - muscle of the forearm

attachments - from the anterior proximal 2/3rds of the ulna & interosseous membrane to the base of the distal phalanges of digits 2-5

actions - flexion of digits 2-5 (MP & IP), and flexion hand at wrist

innervation - median (tendons 2 & 3) & ulnar (tendons 4 & 5) nerves

blood supply - ulnar, anterior interosseous a.

84
Q

Flexor digitorum superficialis

A

location - muscle of the forearm

attachments - from the medial epicondyle (common flexor origin) of the humerus to the sides of the middle phalanges of digits 2-5

actions - flexion of digits (MP & proximal IP), and hand at wrist

innervation - median nerve

blood supply - anterior ulnar recurrent, ulnar & radial a.

85
Q

Flexor pollicis longus

A

location - muscle of the forearm

attachments - from the anterior surface of the radius & interosseous membrane to the the base of the distal phalanx of the thumb

actions - flexes thumb (MP & IP)

innervation - median nerve

blood supply - anterior interosseous & radial a.

86
Q

Palmaris longus

A

location - muscle of the forearm

attachments - from the medial epicondyle of the humerus (common flexor origin) to the palmar aponeurosis

actions - flexes hand at wrist

innervation - median nerve

blood supply - anterior ulnar recurrent a.

87
Q

Pronator quadratus

A

location - muscle of the forearm

attachments - from the anterior surface of the distal radius to the anterior surface of the distal ulna

actions - pronates the forearm

innervation - median nerve

blood supply - anterior interosseous a.

88
Q

Pronator teres

A

location - muscle of the forearm

attachments - from the medial epicondyle & ulnar coronoid process to lateral aspect of the radius

actions - pronates & flexes forearm

innervation - median nerve

blood supply - inferior ulnar collateral, anterior ulnar recurrent, common interosseous, ulnar & radial a.

89
Q

Supinator

A

location - muscle of the forearm

attachments - from the lateral epicondyle of the humerus, radial collateral ligament & shaft of the ulna to the lateral surface of the proximal radius

actions - supinates forearm

innervation - radial nerve

blood supply - radial recurrent & posterior interosseous a.

90
Q

Abductor digiti minimi (C8-T1)

(upper extremity)

A

location - muscle of the hand

attachments - from the pisiform to the ulnar side of the base of the 5th digit

actions - abducts 5th digit

innervation - deep branch of the ulnar nerve

blood supply - superficial palmar arch, common digital & deep palmar branch of ulnar a.

91
Q

Abductor pollicis brevis (C8-T1)

A

location - muscle of the hand

attachments - from the flexor retinaculum to the radial side of the base of the proximal phalanx of the thumb

actions - abducts thumb

innervation - recurrent branch of the median nerve

blood supply - radial & superficial palmar branch of radial a.

92
Q

Adductor pollicis (C8-T1)

A

location - muscle of the hand

attachments - from the capitate & 2nd & 3rd metacarpals (oblique head) and the palmar aspect of the 3rd metacarpal to the base of the proximal phalanx of the thumb

actions - adducts thumb

innervation - deep branch of the ulnar nerve

blood supply - deep palmar arch, radialis indicis & princeps pollicis a.

93
Q

Dorsal interossei (C8-T1)

(upper extremity)

A

location - muscle of the hand

attachments - from the adjacent sides of the metacarpals to the proximal phalangeal bases and dorsal digital expansions of digits 2-4

actions - abducts (MP), flexes (MP) & extends (IP) digits 2-4

innervation - deep branch of the ulnar nerve

blood supply - deep palmar arch, palmar metacarpal, radial, radialis indicis, princeps pollicis & dorsal metacarpal a.

94
Q

Flexor digiti minimi brevis (C8-T1)

A

location - muscle of the hand

attachments - from the hamate to the ulnar side of the base of the proximal phalanx of the 5th digit

actions - flexes (MP) 5th digit

innervation - deep branch of the ulnar nerve

blood supply - (none listed in B pages?)

95
Q

Flexor pollicis brevis (C8-T1)

A

location - muscle of the hand

attachments - from the flexor retinaculum & trapezium to the radial side of the base of the proximal phalanx of the thumb

actions - flexes (MP) thumb

innervation - recurrent branch of the median nerve & deep branch of ulnar n.

blood supply - superficial palmar branch of radial, princeps pollicis a.

96
Q

Lumbricals (C8-T1)

(upper extremity)

A

location - muscle of the hand

attachments - from the tendons of the flexor digitorum profundus to the radial side of the dorsal digital expansions of digits 2-5

actions - flexes (MP) and extends (IP) digits 2-5

innervation - deep branch of the ulnar nerve (medial two lumbricals) and median nerve (lateral two lumbricals)

blood supply - common digital, dorsal metacarpal & dorsal digital a.

97
Q

Opponens digiti minimi (C8-T1)

A

location - muscle of the hand

attachments - from the hook of the hamate to the ulnar margin of the shaft of the 5th metacarpal

actions - opposition of 5th digit to thumb

innervation - deep branch of the ulnar nerve

blood supply - deep palmar arch & deep palmar branch of ulnar a.

98
Q

Opponens pollicis (C8-T1)

A

location - muscle of the hand

attachments - from the flexor retinaculum & trapezium to the palmar surface of the 1st metacarpal

actions - opposition of thumb to 5th digit

innervation - recurrent branch of the median nerve

blood supply - deep palmar arch, superficial palmar branch of radial, princeps pollicis, & radialis indicis

99
Q

Palmar interossei (C8-T1)

A

location - muscle of the hand

attachments - from the palmar aspects of metacarpals 2, 4 & 5 to the dorsal digital expansions of digits 2, 4 & 5

actions - adducts (MP), flexes (MP) & extends (IP) digits 2, 4 & 5

innervation - deep branch of the ulnar nerve

blood supply - deep palmar arch, palmar metacarpal, princeps pollicis, radialis indicis a.

Human Body Block (3 decks)

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