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Muscles Acting on Arms
Axial muscles that cross the shoulder joint & insert on the humerus
6
Anatomy
Undergraduate 4
10/16/2010
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Term

Pectoralis major

 Definition

o: Clavicle and sternum

 

i:  Intertublar groove of humerus

 

a: Flexion, medial rotation and adduction (butterfly stroke)

 

Important due to primate movement of brachiation
Term

Latissimus dorsi

 Definition

 

o:   Lower vertebrae spine T7-L5, iliac crest

 

 i:   Intertubercular groove of humerus

 

 a:  Medial rotation, adduction (monkey bar action or pulling on oars)
Term

Deltoid

 Definition

 

 o:  Acromion and spine of scapula; clavicle

 

 i:  Deltoid tuberosity of humerus

 

 a:  Abduction, swing arms with walking
Term

 

Teres major

 Definition

o:  Inferior angle of scapula

 

i:   Proximal shaft of humerus

 

a:  Adduction and medial rotation

 

SYNERGIST MUSCLE for arm swinging
Term

 

Corachobrahialis

 Definition

 

o:  Coracoid process of scapula

 

 i:  Medial aspect of humerus shaft

 

 a:  Abduction
Term

 

Supraspinatus

 Definition

o:  Supraspinous fossa of scapula

 

i:   Tubercle of humerus

 

a:  Abduction of humerus

 

ANTAGONISTIC MUSCLE to prime movement
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