Applied Anatomy Quiz 2 - Head & Face Muscles and Bones

Buccinator

contracts cheeks to narrow mouth/food bolus

Depressor Anguli Oris

Depresses and pulls corner of mouth inferiorly and laterally (frown)

Depressor Labii Inferioris

lips, exposing teeth (flossing), depresses and protrudes lower lip; pulls lips laterally

Levator Anguli Oris

Elevates corner of mouth (bilateral - smile, unilateral smirk)

Levator Labii Superioris

lip/teeth exposed; elevates and protrudes upper lip (shows upper teeth)

Mentalis

elevates medial chin skin; protrudes lower lip (pout); helpful in judging expressions in pediatric autism/ stroke patients

Orbicularis Oris

Closes and shapes lips; kissing/straw drinking; patients w/ dementia/post stroke will experience spillage caused by weakness in this muscle

Platysma

Depresses jaw and corners of mouth; tightens neck fascia

Risorius

retracts corners of mouth (fake smile); smile not up or down, straight out

Zygomaticus major

elevates and pulls corner of mouth laterally; teeth/smile/laugh

Levator Labii Superioris Alaeque Nasi

Flares nostrils; assist to elevate upper lip

Nasalis - Alar Fibers

Flares nostrils

Nasalis - Transverse fibers

constricts nostrils (sniffing)

Procerus

pulls eyebrows down; concentration

Orbicularis Oculi

Closes eyelids; squinting or expressing pain

Occipitofrontalis

Elevates one or both eyebrows

Masseter

Bilaterally; elevates & protracts mandible

Temporalis

Bilaterally; elevates and retracts mandible

Medial Pterygoid

Bilaterally; elevates & protracts mandible

Lateral Pterygoid (on quiz)

open jaw/mouth bilaterally: depresses & protracts mandible

Zygomatic bone

Maxilla bone

Mandible bone

Hyoid bone

Parietal bone

occipital bone

Frontal bone

Temporal bone