Anatomy & Physiology: Muscles | Questions with 100% Verified
Answers | Latest Update 2026/2027
Question: Frontalis (Frontal Belly)
Answer: Description: Part of the Epicranius, above each eyebrow, starts at the top of the nose Action: Raises
eyebrows, wrinkles brow
Question: Occipitalis (Occipital Belly)
Answer: Description: Part of the epicranius, back of the skull. Action: Pull scalp posteriously
Question: Platysma
Answer: Description: From bottom of chin, down neck to top of the chest Action: Tenses skin of neck, depresses
mandible, pulls lower lip back and down
Question: Orbicularis Oculi
Answer: Description: Round muscle which surrounds each eye Action: Blinking, squinting, draws eyebrows
down
Question: Risorius
Answer: Description: Inferior to zygomaticus, parallel to edge of mouth Action: Draws corner of lip laterally,
tenses lip
, Question: Orbicularis Oris
Answer: Description: Circular muscle around lips, fibers run in different directions Actions: Closes lips, whistles,
kiss
Question: Zygomaticus Major/Minor
Answer: Description: Major/Minor (large/small), diagonally form corner of the mouth to the zygomatic bone
Action: Smiling, pulls the corners of the mouth
Question: Levator Labii Superioris
Answer: Description: Above lips and below eyes, connects to zygomatic bone and upper lip Action: Raises and
furrows upper lip, opens lip
Question: Depressor Labii Inferioris
Answer: Description: Small muscle, lower lip to jaw Action: Draws lower lip inferiorly
Question: Masseter
Answer: Description: jaw, chewing, corner of jaw to zygomatic arch Action: Prime mover of jaw closure,
elevates mandible
Answers | Latest Update 2026/2027
Question: Frontalis (Frontal Belly)
Answer: Description: Part of the Epicranius, above each eyebrow, starts at the top of the nose Action: Raises
eyebrows, wrinkles brow
Question: Occipitalis (Occipital Belly)
Answer: Description: Part of the epicranius, back of the skull. Action: Pull scalp posteriously
Question: Platysma
Answer: Description: From bottom of chin, down neck to top of the chest Action: Tenses skin of neck, depresses
mandible, pulls lower lip back and down
Question: Orbicularis Oculi
Answer: Description: Round muscle which surrounds each eye Action: Blinking, squinting, draws eyebrows
down
Question: Risorius
Answer: Description: Inferior to zygomaticus, parallel to edge of mouth Action: Draws corner of lip laterally,
tenses lip
, Question: Orbicularis Oris
Answer: Description: Circular muscle around lips, fibers run in different directions Actions: Closes lips, whistles,
kiss
Question: Zygomaticus Major/Minor
Answer: Description: Major/Minor (large/small), diagonally form corner of the mouth to the zygomatic bone
Action: Smiling, pulls the corners of the mouth
Question: Levator Labii Superioris
Answer: Description: Above lips and below eyes, connects to zygomatic bone and upper lip Action: Raises and
furrows upper lip, opens lip
Question: Depressor Labii Inferioris
Answer: Description: Small muscle, lower lip to jaw Action: Draws lower lip inferiorly
Question: Masseter
Answer: Description: jaw, chewing, corner of jaw to zygomatic arch Action: Prime mover of jaw closure,
elevates mandible
