Upper Limb- Shoulder Muscles Flashcards
Pectoralis major
Clavicle, sternum, ribs 1-6 —> humerus interrubercular groove
Flexion, adduction, medial rotation of humerus
Nerve supply: c5-c6–> lateral pectoral nerve
c8-t1–> medial pectoral nerve
BV: Thoracic & thoracoacromial arteries
Subclavius
Rib 1 —> inf clavicle
Clavicle depression
N: C5-C6–> subclavian nerve
BV: thoracoacromial –> clavicular
Lateral head triceps brachii
Above radial groove —> olecranon process
Extend elbow and forearm
N: c7–> Radial N
BV: deep brachial, sup ulnar collateral
Pectoralis Minor
Ribs 3-5 —> coracoid process
Scapula depression, rib elevation
N: C8-T1 –> medial pectoral
BV: thoracoacromial
Supraspinatus
Supraspinous fossa —> greater tub sup facet
Humerus abduction
N: c5-c6 –> suprascapular nerve
BV: Subclavian –> suprascapular artery
Test function vis the empty can/jobes test
Teres minor
Prox 2/3 lat border —> greater tuber inf facet
Humerus lateral rotation
N: C7–> AXILLARY n
BV: subscapular artery, post circumflex
Deltoid
Acromion, crest of scapula spine, lateral 1/3 clavicle —> deltoid tuberosity of humerus
Flex, med rotation, abduction, extend, lat rotate humerus
Serratus anterior
Ribs 1-8 —> medial border scapula
Scapula protraction, abduction, elevation
Pectoralis major
Clavicle, sternum, ribs 1-6 —> humerus interrubercular groove
Flexion, adduction, medial rotation of humerus
Pectoralis Minor
Ribs 3-5 —> coracoid process
Scapula depression, rib elevation
Infraspinatus
Infraspinous foss —> greater tubercle middle facet
Humerus lateral rotation
Lateral head triceps brachii
Above radial groove —> olecranon process
Extend elbow and forearm
Trapezius
Post skull sup nuchal lIne + occipital protuberance—> unchallenged ligament + c7-t12 spines —> lateral clavicle, sup scapula spine and acromion
Scapula elevation, rotation, retraction, depression
Deltoid
Acromion, crest of scapula spine, lateral 1/3 clavicle —> deltoid tuberosity of humerus
Flex, med rotation, abduction, extend, lat rotate humerus
