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15 terms

Anatomy Functions

STUDY
PLAY
Platysma
draws corners of mouth inferiorly.
-helps with expression of sadness/fright
submandibular glands
salivary glands
sternocleidomastoid
-unilateral and bilateral contraction
-tilts head to side
-rotates neck so the face points superiorly to opposite side
-when bilateral contraction, they flex the neck
sternohyoid
depresses hyoid bone after it has been elevated for swallowing
omohyoid
depresses, retracts and steadies hyoid bone
hyoid bone
aids in tongue movement and swallowing
anterior scalene
-elevates 1st rib during inspiration when neck is fixed
-lateral flexion (to the same side)
-contralateral rotation
middle scalene
-elevate 1st rib during inspiration when neck is fixed
-lateral flexion
-contralateral rotation
posterior scalene
-raises 2nd rib
-lateral flexion
-contralateral rotation
brachial plexus
most muscular innervation of upper limbs
pectoralis major
-adducts and medially rotates humerus
-draws scalpula anterior and inferiorly
-pulls arm across chest
pectoralis minor
stabilize scalpula
serratus anterior
-pulls scalpula anterior and downward
-protract and rotate scalpula
external intercostals
draw ventral part of rib upward
internal intercostals
draws ventral part of rib inward/downward