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Exam 2
Axial musculature
24
Anatomy
Undergraduate 1
10/20/2012

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Cards

Term
Epicranius
Definition
2 muscles connected by the galea aponeurotica
Term
Orbicularis Oculi
Definition
Action- Closes eyes (Blinking,Squinting)
Term
Orbicularis Oris
Definition
Action- Purses lips, closes mouth
(kissing muscle)
Term
Depressor Labii Inferioris
Definition
Action-Draws lower lip downward
Term
Depressor anguli oris
Definition
Action- Depresses corner of mouth
(frowning muscle)
Term
Levator labii superioris
Definition
Action- Raises upper lip, flares nostrils
(Elvis Face)
Term
Levator anguli oris
Definition
Action-elevates corner of mouth
"Smiling muscle"
Term
Zygomaticus
Definition
Action- Raises corners of mouth
"Full Smile"
Term
Risorius
Definition
Action-Draws angle of mouth laterally, as in grinning; "HELPS ZYGOMATICUS"
Term
Mentalis
Definition
Action- Wrinkles chin and protrudes lip forward
Term
Platysma
Definition
Action- Depresses mandible and lower lip
Term
Buccinator
Definition
Action-Compresses cheek, holds food between teeth during chewing
"trumpeter's muscle"
Term
Temporalis
Definition
Action-Elevates mandible
Term
Masseter
Definition
Action-Closes jaw and elevates mandible
"Angry Jaw"
Term
Suprahyoid Muscles
Definition
Action-anchor tongue, form floor for oral cavity, assist in swallowing
Term
Infrahyoid Muscles
Definition
Action- Depress hyoid bone and larynx during swallowing and speaking
(Hyoid goes up or down when swallowing)
Term
Sternocleidomastoid
Definition
Action- Prime mover of active neck flexion; lateral neck flexion
Term
Erector spinae
Definition
Action- Prime mover of back extension; maintain erect posture
"Posture muscles"
Term
Diaphragm
Definition
Action- Prime mover of inspiration
Term
Intercostals
Definition
Action- Inspiration/expiration
Term
External Oblique
Definition
Action- Contributes to flexion of vertebral column, trunk rotation and lateral flexion
Term
Internal Oblique
Definition
Action- Trunk flexion, rotation, and lateral flexion
Term
Transversus abdomninis
Definition
A- compresses abdominal contents
Term
Rectus abdomninus
Definition
A- Flexes vertebral column, depresses ribs, stabilizes pelvis during walking
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