Chest Wall Muscles

Question 1

Platysma Innervation and Perfusion

Answer 1

CN 7 (facial); submental a. , suprascapular a.

Question 2

Pectoralis major Innervation and Perfusion

Answer 2

Lateral and medial pec. n. (C5-T1); pec. branch of thoracoacromial

Question 3

Pectoralis Minor Innervation and Perfusion

Answer 3

Lateral and medial pec. n. (C8-T1); pec. branch of thoracoacromial

Question 4

Subclavian Innervation and Perfusion

Answer 4

Subclavian nerve C5 + C6; Clavicular branch of thoracoacromial

Question 5

Seratus Anterior Innervation and Perfusion

Answer 5

Long thoracic nerve C5, C6, C7; lateral thoracic and toracodorsal

Question 6

Platysma Location and Function

Answer 6

Superficial, goes from shoulder to neck to face; causes grimacing facial expression

Question 7

Pectoralis Major Location and Function

Answer 7

Superficial, upper chest wall; Flexion, adduction, rotation of humerus

Question 8

Pectoralis Minor Location and Function

Answer 8

Deep to the pectoralis major, upper chest; Stabilize scapula

Question 9

Subclavian Location and Function

Answer 9

placed between the the clavicle and the first rib, deep to the pec minor; Depression of clavicle

Question 10

Serratus Anterior Location and Function

Answer 10

Side of the trunks, from the ribs to the medial end of scapula, Deep to pec minor; protracts and stabilizes scapula