Flashcards in Muscles of the Upper Extremity: Axiohumeral Muscles Deck (8)
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1
Q
Latissimus Dorsi Proximal Attachment
A
Spinous process of T6-12, thoracolumbar fascia, posterior iliac crest, and lower ribs
2
Q
Latissimus Dorsi Distal Attachment
A
Floor of the intertubercular groove of the humerus
3
Q
Latissimus Dorsi Innervation
A
Thoracodorsal n. [C6,C7,C8]
4
Q
Latissimus Dorsi Action
A
Extends the shoulder Adducts the shoulder Medially rotates the shoulder Depresses the shoulder girdle Assists with: -Extension of the trunk -Lateral flexion of the trunk
5
Q
Pectoralis Major Proximal Attachment
A
Clavicular head: medial end of the clavicle
Sternocostal head: anterior sternum and costal cartilages of the first 6 ribs
6
Q
Pectoralis Major Distal Attachment
A
Lateral lip of the intertubercular groove of the humerus
7
Q
Pectoralis Major Innervation
A
Medial and lateral pectoral nn. [C5,*C6] (clavicular head)
[C7,C8,T1] (sternocostal head)
8
Q
Pectoralis Major Action
A
All fibers: Medially rotate the shoulder Adduct the shoulder Clavicular head: -Flexes the shoulder -Horizontally adducts the shoulder Sternocostal head: -Extends the shoulder