😘Muscles acting on glenohumeral and humeroulnar joints (originating from thoracic, acromial, or brachial regions) movement😘

pectoralis major

adduct, flex, and medially rotate arm

pectoralis minor

serratus anterior

protract and medially rotate sholder

trapezius

elevate, retract, and laterally rotate shoulder

levator scapulae

elevate and retract shoulder

rhomboid major

retract shoulder

rhomboid minor

latissimus dorsi

adduct, extend, and medially rotate arm

origion: acromion and spine of scapula; acromial (lateral) porton of clavical

insertion: deltoid tuberosity of humerus

coracobrachialis

supraspinatus (rotator cuff 1 of 4)

abduct arm and stabukuze shoulder

origion: supraspinous fossa

insertion: greater tubercle

infraspinatus (rotator cuff 2 of 4)

laterally rotate arm and stabilize shoulder

origion: infraspinous fossa

insertion: greater tubercle

teres minor (rotator cuff, 3 of 4)

laterally rotate arm and stavilize shoulder

origion: lateral border of scapula

insertion: grater tubercle

subscapularis (rotator cuff, 4 of 4)

medially rotate arm and stabilize shoulder

origion: subscapular fossa

insertion: lesser tubercle

teres major

biceps brachii (long ans short heads)

flex and supinate forearm

origion: long head - superior aspect, glenoid fossa

short head - coracoid process

insertion: radial tuberosity

brachialis

flex forearm

origion: anterior aspect, humeral shaft

insertion: coronoid process of ulna

triceps brachii (medial, lateral, and long heads)

extend forearm and adduct arm

origion: long head: inferior aspect, flenoid fossa

lateral head: surgical neck of humerus

medial head: surgical neck of humerus

insertion: olecranon process