amp 2 lab quiz

levator scapula

elevates scapula; rotates laterally flexes neck

sternocleidomastoid (SCM)

one: rotates, extends head, both: flexes neck

orbicularis oculi

closes eye

orbicularis oris

closes and protrudes lips as in “kissing”

corrugator supercilii

depresses and pulls eyebrows together

temporalis

elevates and retracts mandible

masseter

elevates and protracts mandible

deltoid

abducts, flexes, extends, medially and laterally rotates arm

pectoralis major

flexes, adducts, medially rotates arm

supraspinatus

abducts arm at shoulder joint

infraspinatus

extends, laterally rotates arm at shoulder joint

biceps brachii

flexes arm, flexes forearm at elbow joints; supinates forearm

triceps brachii

extends arm at shoulder joint; extends forearm below

brachioradialis

flexes forearm at elbow joint, supinates, pronates forearm at wrist joint

palmaris longus

flexes hand at wrist joint

extensor carpi radialis

extends and abducts hand at wrist

trapezius

extends neck, superiorly rotates scapula, abducts scapula

latissimus dorsi

extends, abducts, medially rotates joints, draw arm inferiorly

external abdominal oblique

compresses abdominal wall laterally vertebral column

rectus abdominus

flexes vertebral column, compresses abdominal wall

diaphragm

inhalation, exhalation

external intercostals

elevates ribs to increase thoracic volume