Rib/Deep Chest & Arm action producer m.

Unit 3

Sp-PL!

serratus anterior, pectoralis minor- pectoralis major, latissimus dorsi!

paralysis of the long thoracic nerve would result in

winging of the scapula

serratus anterior m. is innervated by

long thoracic n.

the pectoralis major m. is innervated by

medial pectoral & lateral pectoral n.

the pectoralis minor m. is innervated by

medial pectoral n.

the latissimus dorsi m. is innervated by

thoracodorsal n.

both the serratus anterior m. and pectoralis minor m. perform what action

protracts scapula

the serratus anterior m. protracts scapula (along with pectoralis minor) as well as

holds scapula against thoracic wall

the pectoralis minor m. protracts scapula (along with serratus anterior m.) as well as

assists with breathing (elevates ribs when scapula is stationary)

both pectoralis major and latissimus dorsi m. perform these actions

adducts arm & medially rotates arm

the latissimus m. performs one additional action then the two it shares with pectoralis major m. which is

arm extension

which muscle is highlighted in green?

serratus anterior

which muscle is highlighted in yellow?

pectoralis minor

which muscle is shown?

pectoralis major

which muscle is shown?

latissimus dorsi

where is pectoralis minor m. insertion point?

coracoid process