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Upper Limb > Muscles > Flashcards

Muscles Flashcards

1
Q

Trapezius

A

Origin: Skull(external occipital protuberance)
Fascia(ligamentum nuchea)
Vertebra(C7,T1-T12)

Insert: Lateral 1/3 of clavicle
Acromion and spine of scapula

Elevates and depress shoulder
Retracts scapula
Extend head

Cranial Nerve 11 or accessor nerve

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2
Q

Latissimus dorsi

A

Origin: Vertebra (T6-T12)
Thoracolumbar fascia
Iliac crest of pelvic bone

Insert: Humerus (bicipital groove)

Adductor, extends and medially rotate arm i.e. Swimmer muscle

Thoracodorsal nerve

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3
Q

Lavatory Scapulae

A

Origin: Transverse process of C1-C4
Insert: Superior angle and medial border of scapula

Elevates and adducts scapula

Dorsal scapular nerve

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4
Q

Rhomboid Minor

A

Origin: C7-T1
Insert Medial border of scapula

Elevates and adducts scapula

Dorsal Scapula Nerve

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5
Q

Rhomboid Major

A

Origin: spines T2-T5
Insert: medial border to inferior angle of scapula

Elevates and adducts scapula

Dorsal Scapular

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6
Q

Lavatories Costarum

A

Origin: Transverse Processes of C7, T1-11
Insert: Inferior origin of ribs

Raise ribs for inspiration

Dorsal Rami of thoracic spinal nerves

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7
Q

Serratus Posterior Superior

A

Origin: Spines of cervicle and upper thoracic vertebral
Insert: Ribs

Raise ribs for inspiration

Intercostal Nerves

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8
Q

Serratus Posterior Inferior

A

Origin: Spines of Upper Lumbar and lower thoracic vertebra
Insert: Ribs

Lower ribs for expiration

Intercostal nerves

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9
Q

Splenius

A

Origin: Spines of T1-T4
Insert:Splenius Capitus to Skull (occipital and temporal bones)
Splenius Cervicis to vertebra (transverse process of C2-C3)

Extend Neck and head (rotate in unilateral action)

Dorsal rami of spinal nerves

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10
Q

Iliocostalis

A

Part of erector spinae

Origin: Ilium and ribs
Insert: Ribs and transverse process

Extend truck and vertebral columns

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11
Q

Longissmus

A

Part of Erector Spinae

Origin: Tranverse processes of vertebra
Insert: Transverse processes of vertebra

Extend trunk and vertebral column

Dorsal rami of spinal nerves

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12
Q

Spinalis

A

Part of erector spinae

Origin: spinous processes
Insert: spinous process

Extend trunk and vertebral column

Dorsal rami of spinal nerves

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13
Q

Semispinalis

A

Part of transversospinalis

Origin: transverse process of vertebra
Insert: Spines of vertebra superior to origin. Extend across 5-6 vertebra.

All extend trunk in bilateral action and rotate vertebral column in unilateral action

Dorsal rami of spinal nerves

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14
Q

Multifidus

A

Part of transversospinalis

Origin: transverse process of vertebra
Insert: Spines of vertebra superior to origin. Extend across 3-4 vertebra.

All extend trunk in bilateral action and rotate vertebral column in unilateral action

Dorsal rami of spinal nerves

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15
Q

Rotators

A

Part of transversospinalis

Origin: transverse process of vertebra
Insert: Spines of vertebra superior to origin. Extend across 1-2 vertebra.

All extend trunk in bilateral action and rotate vertebral column in unilateral action

Dorsal rami of spinal nerves

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16
Q

Pectoralis Major

A

Origin: Medial Half of clavicle and costal cartilage 1-6
Insert: Intertubercular Sulcus

Action: Adducts and medially rotates the arm
Claviciular head: flexes arm
Sternocostal head: assists in respiration when shoulders is
Fixed

Medial and Lateral pectoral nerves from medial and lateral cords of brachial plexus

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17
Q

Pectoralis Minor

A

Origin: 3-5 ribs near cartilage
Insert: Coracoid Process of scapula

Action: Depress scapula, elevates ribs of origin to assist in
respiration when the shoulder is fixed

Medial Pectoral Nerve

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18
Q

Serratus Anterior

A

Origin: upper 8 ribs
Insert: Medial (vertebral) border of scapula

Rotates scapula; draws scapula forward around thoracic wall (protraction), holds scapula against thoracic wall

Long thoracic (nerve to serratus anterior)

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19
Q

Subclavius

A

Origin: 1st Costal Cartilage
Inset: Inferior surface of the clavicle

Anchors & Depresses clavicle during upper limb movements

Nerve to subclavius

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20
Q

Deltoid

A

Origin: lateral 1/3 of clavicle, acromion, scapular spine
Insert: Deltoid tuberosity of humerous

Flexes, medial rotate arm thanks to the clavicle
Abducts arm thanks to the acromion
Extends, laterally rotate arm thanks to the Posterior scapular spine

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21
Q

Supraspinatus

A

Origin: supraspinous fossa of scapula
Insert: greater tubercle of humerous

Initiates abduction of arm; stabilize shoulder joints

Suprascapular nerve

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22
Q

Infraspinatus

A

Origin: Infraspinous fossa of scapula
Insert: Greater Tubercle of humerus

Laterally rotates arm; stabilizes shoulder joint

Suprascapular nerve

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23
Q

Teres Minor

A

Origin: Upper Lateral Border of Scapula
Insert: Greater tubercle of humerus

Laterally rotate arm; stabilizes shoulder joint

Axillary Nerve

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24
Q

Subscapularis

A

Origin: subscapular fossa of scapula
Insert: lesser tubercle of humerous

Medially rotate arms; stabilize shoulder joint

Upper& Lower subscapular nerve

25
Q

Teres Major

A

Origin: Inferior border of scapula
Insert: crest of lesser tubercle of humerus

Medially rotates hand, adducts arm, extends arm

Lower subscapular nerve

26
Q

Biceps Brachii

A

O: Anterior Humerous
I: Radial tuberosity and bicipital aponeurosis

Flexor of forearm
Supinator of forearm
Weak flexor of arm at glenohumeral joint

Musculocutaneous nerve

27
Q

Coracobrachialis

A

O: Coracoid process of scapula
I: Mid-shaft of humerus

Weak flexor of arm at glenohumeral joint

Musculocutaneous nerve

28
Q

Brachialis

A

O: Anterior Humerus
I: Coronoid process of ulna

Powerful flexor of forearm

Musculocutanous nerve.

29
Q

Triceps

A

O: Long head is infraglenoid tubercle of scapula
Medial and lateral head is posterior humerus

I: Olecron process of ulna

Extension of forearm

Radial nerve

30
Q

Anconeus

A

O: lateral epicondyle of humerous
I: Olecranon of Ulna

Extends forearm (assist triceps)

Radial Nerve

31
Q

Pronator Teres

A

Superficial group

O: Medial epicondyle of humerous and coronoid process of ulna

I: Lateral radial midshaft

Pronates forearm

Median Nerve

32
Q

Flexor Carpi Radialis

A

O: Medial Epicondyle of the humerous
I: Base of 2nd metacarpal( sometimes 3rd)

Superficial muscle

Flexes and abducts wrist joints

Median Nerve

33
Q

Palmaris Longus

A

O: Medial Epicondyle of the humerous
I: Palmart Aponeurosis

Superficial Group

Flex wrist

Median Nerve

34
Q

Flexor carpi ulnaris

A

O: Medial Epicondyle
I: Pisiform, hook hamate, base of 5th metacarpal

Superficial Group

Flexes and adducts wrist joint

Ulnar Nerve

35
Q

Flexor Digitorum Superficialis

A

O: Medial Epicondyle of the Humerous
I: Sides of middle phalanges 2-5. Tendons will bifurcates

Intermediate group

Flexes wrist, MCP, PIP joints of digits 2-5

Median Nerve

36
Q

Flexor Pollicis Longus

A

O: Midshaft of radius and interosseous membran
I: Distal Phalanx of thumb

Deep Group

Flexes MCP and IP joint of thumb

Median nerve

37
Q

Flexor Digitorum Profundus

A

O: Ulna and interosseous membran
I: Distal phalanges of digits 2-5. Tendon passes through flexor Digitorum superficialis

Flex wrist, MCP, PIP, DIP joints of digits 2-5

Median nerve does lateral halve
Ulnar nerve does medial halve

38
Q

Pronator Quadratus

A

O: Distal Ulna
I Distal radius

Deep group

Pronates hand

Median Nerve

39
Q

Brachioradialis

A

Superficial Posterior forearm

O: Lateral Supracondylar ridge of humerous
I: Styloid Process of Radius

Flex elbow at midprone position

Radial Nerve

40
Q

Extensor Carpi Radialis Longus

A

O: Lateral supracondylar ridge of humerus
I: Base of 2nd metacarpal

Extends and abducts wrist joint

Radial Nerve

41
Q

Extensor Carpi Radialis Brevis

A

O: Lateral Epicondyle of humerus
I: Base of 3rd metacarpal

Superficial Extensor of forearm

Extends and abducts wrist joints

Radial Nerve

42
Q

Extensor Digitorum

A

O: lateral Epicondyle of humerous
I: Dorsal Digital Expansions on middle and distal phalanges of digits 2-5

Extends Wrist joint
Extend digits 2-5 at MCP, PIP, DIP joints

Radial Nerve

43
Q

Extensor Digiti minimi

A

O: Lateral Epicondyle of Humerus
I: Middle and Distal phalanges of 5th digit via extensor expansion

Extends wrist joint
Extends 5th digit at MCP, PIP, DIP joints

Radial Nerve

44
Q

Extensor Carpi Ulnaris

A

O:Lateral epicondyle of humerus
I:Base of 5th metacarpal

Extends wrist
Adducts wrist

Radial Nerve

45
Q

Supinator

A

O:Lateral Epicondyle of Humerus
I: upper lateral radius

Supination of arm

Radial Nerve

46
Q

Abductor Pollicis Longus

A

O: Ulna and Interosseous membran
I: Base of 1st metacarpal

Abducts thumb

Radial Nerve

47
Q

Extensor Pollicis Brevis

A

O: Interosseous Membrane
I: Base of proximal phalanx of thumb

Extends proximal phalanx of thumb

radial nerve

48
Q

Extensor Pollicis Longus

A

O: Ulna and interosseous membrane
I: Base of the distal phalanx of thumb

Extends distal phalanx of thumb

Radial Nerve

49
Q

Abductor Pollicis brevis

A

O: Tubercle of scphoid and trapezium
flexor retinaculum
I: Lateral side of proximal phalanx of thumb

abduct thumb

median nerve

50
Q

flexor pollicis brevis

A

superficial head:
O: flexor retinaculum
I: lateral side proximal phalanx o thumb

Deep Head:
O: Capitate and trapezium
I: lateral side proximal phalanx to thumb

flexes thumb

median nerve

51
Q

opponens pollicis

A

O: tubercle of trapezium
I: lateral side of 1st metacarpal

Opposition of thumb

Median Nerve

52
Q

adductor pollicis

A

Oblique Head
O: Capitate and bases of 2nd and 3rd metacarpal
I: Base of the proximal phalanx of thumb

Transvere Head
O: Shaft of 3rd metacarpal
I:Base of the proximal phalanx of thumb

adducts thumb

Ulnar nerve

53
Q

Palmaris Brevis

A

O: Palmar Aponeurosis
I: Skin of the hypothenar eminence

Tightens skin over hypothenar eminence

Ulnar Nerve

54
Q

Abductor Digiti Minimi

A

O: Pisiform
I: Medial Side of the proximal phalanx of 5th digit

Abducts 5th digits

Ulnar Nerve

55
Q

Opponens Digiti Minimi

A

O: Hook of Hamate and flexor retinaculum
I: 5th metacarpal

Laterally Rotates Metacarpal 5 to oppose little finger w/ thumb

Ulnar Nerve

56
Q

Doral Interossei (4)

A

O: Sides of adjacent metacarpals
I: Proximal phalanges and dorsal digital expansions

Abduct digits 2,3,4
Flex MCP joins
Extend PIP, DIP
(assist lumbrical)

Ulnar nerve

57
Q

Palmar Interossei (3)

A

O: Medial SIde of metacarpal 2
Lateral Side of metacarpal 4
Lateral Side of metacarpal 5

I: proximal phalanges and dorsal digital expansion

58
Q

Lumbricals (4)

A

O: Tendons of flexor digitorum profundus
I: Lateral side of extensor expansion of digits 2-5

Flexes MCP joints, extends DIP and PIP

Medain for 1 and 2
Ulnar for 3 &4

Upper Limb (2 decks)

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