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MSAK 101 > Princibles of TX > Flashcards

Princibles of TX Flashcards

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Trapezius

  • O: Upper: EOP, medial 1/3 of superior nuchal line, nuchal ligament
    • Middle: spinous process of C7 - T5
    • Lower: SPs T5 - T12
  • I: lateral 1/3 of the clavical, acromion process & spine of the scapula
  • A:Elevation & retraction (adduction) of scapula, upward rotation of scapula;
    • unilateral lateral flexion of head
    • bilateral extention of head

Stabilization of scapula for arm movements

  • Spinal Accessory (CN XI) Ventral rami of C2- C4
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Levator Scapulae

  • O: TP’s of C1 - C4
  • I: medial border of the scapula (superior part)
  • A: elevation of scapula; extension & lateral flexion of neck
  • N: Dorsal scapular nerve (C3, C4, C5)
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Sternocleidomastoid

  • O: Sternal head: manubrium of sternum
    • Clavicular head: medial 1/3 of clavicle
  • I: mastoid process of temporal bone
  • A: rotation of head to contralateral side, lateral flexion to ipsilateral side
    • Bilateral action: neck flexion & capital (C0-C1) extension
  • N: Motor: spinal accessory nerve (CN IX)
    • Sensory: ventral rami of C2, C3
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Latissimus Dorsi

  • O: SP’s T7 L5; thoracolumbar fascia, illiac crest, posterior sacrum; ribs 9-12; inferior angle of scapula
  • I: Medial lip of bicipital groove of humerous
  • A: adduction, medial rotation & extension of shoulder; anertior pelvic tilt; downward rotation of scapula
  • N: thoracodorsal nerve (C6,C7,C8)
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Deltoid

  • O: Lateral 1/3 of clav, acromion process & spine of scap
  • I: deltoid tuberocity of humerus
  • A: Abduction of shoulder( middle fibers)
    • flexion, horizontal adduction & medial rotation of shoulder (anterior fibers)
    • extension, horizontal abduction & lateral rotation of shoulder (posterior fibers)
  • N: axillary nerve (C5, C6)
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Supraspinatus

  • O: medial 2/3 of the supraspinatus fossa of scap
  • I: superior faccet of the greater tubricle of humerous
  • A: abduction of shoulder, stabilizes GH joint
  • N: suprascapular nerve (C5, C6)
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Infraspinatus

  • O: medial 2/3 of the infraspinatus fossa & inferior portion of spine of scap
  • I: middle facet of the greater tubercle of the humerus & shoulder joint capsule
  • A: lateral rotation of shoulder, stabilizes GH joint
  • N: suprascapular nerve C5, C6
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Teres Minor

  • O: superior lateral border of scap
  • I: inferior facet of greater tubercle of humerus & shoulder joint capsule
  • A: lateral rotaion of shoulder, stabilizes GH joint, adduction of shoulder (weak action)
  • N: axillary nerve C5, C6
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subscapularis

  • O: subscapular fossa of scap
  • I: lesser tubercle of humerus & shoulder joint capsule
  • A: medial rotation of joint & stabilizes GH joint
  • N: upper and lower subscapular nerves C5, C6
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Teres Major

  • O: dorsal surfaces of the inferior angle and lower 1/3 of the lateral border of the scapula
  • I: medial lip of bicipital groove of humerus (just medial to insertion of latissimus dorsi)
  • A: medial rotation, adduction, extension of the shoulder from a flexed position, upward scapular rotaion (closed chain action)
  • N: lower subscapular nerve C5, C6, C7
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Pectoralis Major

  • O: Clavicular fibers - medial 1/2 of the clavicle
    • sternal fibers - anterior surface of sternum
    • costal fibers - costal cartilage of ribs 1-6
  • I: crest of the greater tubercle of humerus (lateral lip of bicipital groove)
  • A: adduction and medial rotation of shoulder; horizantal adduction of shoulder, flexion of shoulder (clavicular portion)
  • N: medial and lateral pectoral nerve C8, T1
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Pectoralis Minor

  • O: superior margins of ribs 3-5 (anterior lateral portion), facia over corresponding intercostal muscles
  • I: coracoid process of scapula (medial aspect)
  • A: stabilizes scapula for arm movements; depresses and downwardly rotates scapula; assits in scapular protraction from retracted position; elevates ribs 3-5 (forced expiration)
  • N: medial pectoral nerve C8, T1
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Rhomboid Major

  • SP’s T2-T5, supraspinous ligament
  • I: medial border of scapula ( scapular spine to inferior angle)
  • A: retraction of scapula; elevation & downward rotation of scap
  • N: dorsal scapular nerve (C4, C5)
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Rhomboid minor

  • O: SP’s C7/T1, supraspinatus ligament
  • I: medial border at root of spine of the scapula
  • A: retraction of scapula, elevation& downward rotation of scap
  • N: dorsal scapular nerve (C4, C5)
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Biceps Brachii

  • O: Long head = supraglenoid tubercle & glenohumeral labrum
    • Short Head = coracoid process of scapula
  • I: radial tuberosity & bicipital aponeurosis
  • A: Flexion & supination of elbow; flexion of shoulder; stabilization of anterior aspect of shoulder; abduction of shoulder (long head); adduction of shoulder (short head)
  • N: musculocutaneus nerve C5, C6
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Coracobrachilais

  • O: apex of coracoid process of scapula
  • I: medial shaft of humerus (middle 1/3)
  • A: flexion and adduction of shoulder; horizotal adduction of shoulder
  • N: musculocutaneus nerve C5, C6, C7
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Brachialis

  • O: anterior distal 1/2 of humerus
  • I: ulnar tuberosity & coronoid process of ulna
  • A: flexion of elbow (initiation)
  • N: musculocutaneus nerve & small branch from radial nerve C5, C6, C7
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Triceps Brachii

  • O: Long head: infraglenoid tubercle & neck of scapula
    • ​Lateral head: upper half of posterior surface of shaft of humerus (above radial groove)
    • medial head: posterior shaft of humerus (below radial groove)
  • I: olecranon process of ulna
  • A: extension of elbow (prime mover); adduction & exension of shoulder (long head only)
  • N: radial nerve C6, C7, C8; axillary nerve (long head)
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Brachioradialis

  • O: lateral supracondylar ridge of the humerus
  • I: lateral side of the base of the styloid process of radius
  • A: flexion of elbow; pronation of forearm when supinated; supination of forearm when pronated
  • N: radial nerve C5, C6
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extensor carpi radialis longus

  • O: distal 1/3 of the lateral supracondylar ridge of the humerus (below brachioradialis)
  • I: dorsal surface of base of the 2nd metacarpal bone, radial side
  • A: extension of wrist, radial deviation, flexion & supination of elbow(weak action)
  • N: radial nerve C5, C6
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extensor carpi radialis brevis

  • O: common extensor tendon from LEoH
  • I: dorsal surface of the base of 3rd metacarpal bone
  • A: extension of wrist, radial deviation, flexion of elbow joint(weak action)
  • N: radial nerve C7, C8
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extensor carpi ulnaris

  • O: Humeral head: LEoH via CET
    • Ulnar head: posterior shaft of ulna
  • I: base of ulnar side 5th metacarpal
  • A: ulnar deviation, extension of wrist, extension of elbow(W/A)
  • N: radial nerve C6, C7, C8
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Quadratus Lumborum

  • O: inferior border 12 rib & TP of L1-L4
  • I: posterior iliac crest & iliolumbar ligament
  • A: Unliateral: elevation of pelivs, lateral flexion of trunk, dpression of 12 rib; Bilateral: extension of lumbosacral spine
  • N: Lumbar plexus T12-L3
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Psoas Major

  • O: TP’s L1- L5, Vertebral bodies of T12-L5 & corresponding intervertebral discs
  • I: lesser Trochanter of Femur
  • A: Flexion & lateral rotation of the hip; Flexion & lateral flexion of spinal joints; anterior pelvic tilt
  • N: Lumbar plexus Ventral Rami (L1-L3)

Psoas Minor

  • O: sides of vertebral bodies T12 & L1, and corresbonding IVD
  • I: Pectineal line of pubis
  • A: weakly assists in flexion of the trunk or posterior pelvic tilt
  • N: lumber plexus L1 - L2
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Gluteus Maximus

  • O: Posterior iliac crest, sacrum, coccyx and the sacrotuberous ligament
  • I: iliotibial band & gluteal tuberosity of the femur
  • A: extend & laterally rotate the hip joint; lower fibers assist in adduction; upper fibers assist in abduction
  • N: inferior gluteal nerve L5, S1, S2
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Gluteus Minimus

  • O: outer surface of the ilium, b/w anterior and inferior gluteal lines
  • I: greater trochanter of the femur
  • A: abduction of the hip. anterior fibers: medially rotates and may assist in flexion of the hip joint. assists in pelvic stabilization during gait
  • N: superior gluteal nerve L4 - S1
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Piriformis

  • O: anterior sacrum, & the sacrotuberous ligament
  • I: greater trochanter of the femur (superiomedial surface)
  • A: lateral rotaion & horizantal abduction of hip; abduction of hip when thigh is flexed
  • N: nerve to piriformis L5 -S2
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Adductor Brevis

  • O: body and inferior ramus of the pubis
  • I: proximal 1/3 of the medial lip of the linea aspera
  • A: adduction and flexion of the hip joint, lateral rotation of thigh
  • N: obturator nerve L2-L4

Adductor Longus

  • O: anterior surface of the pubis (inferior to pubic tubercle)
  • I: middle 1/3 of the medial lip of linea aspera
  • A: adduction and flexion of hip joint, lateral rotation of thigh
  • N: obturator nerve L2-L4
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Adductor magnus

  • O: Anterior head: Ischiopubic ramus
    • Posterior head: ischial tuberosity
  • I: Anterior head: linea aspera (gluteal tuberosity and medial supracondylar line)
    • ​Posterior head: Adductor tubercle of the femur (above the medial epicondyle)
  • A: adduction and extension of hip (anterior head will laterally rotate thigh)
  • N: Obturator nerve L2-L4 (anterior head) and Sciatic tibial division L4,L5 (posterior head)
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Tibialis Anterior

  • O: anterior proximal tibia, crural fascia (lateral tibial condyle and proximal 2/3 of the anterolateral surface of tibia, interosseous membrane)
  • I: medial cuneiform bone, bas of the first metatarsal bone (medial plantar surfaces)
  • A: dorsiflexes the ankle joint, and inversion of the ankle
  • N: Deep peroneal (fibular) nerve L4-S1
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Rectus Femoris

  • O: Anterior (straight) head: from anterior inferior iliac spine (AIIS)
    • Posterior (reflected) head: from groove above rim of acetabulum
  • I: tibial tuberosity (via common quadriceps tendon and patellar ligament) or the base of patella
  • A: extension of knee and hip flexion
  • N: femoral nerve L2- L4
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Vastus Intermedius

  • O: anterior and lateral surfaces of the body of femur
  • I: tibial tuberosity ( via common quadriceps tendon) or base of patella
  • A: knee extension
  • N: femoral nerve L2 - L4

MSAK 101 (32 decks)

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