Chapter 11 Axial Musculature

What muscle compresses and purses the lips?

orbicularis oris

what are the muscles that are involved in neck movement?

scalenes, sternoclediomastoid, splenius capitis

When someone nods their head, what movement is occurring at the neck?

Flexion/extension

what muscle is involved for extension at the torso?

erector spinae

What are the muscles that causes rotation of the torso?

external oblique internal oblique iliocostalis longissimus

Amanda has dimples. Dimples are an inheritable trait caused by a shortened muscle which leads to a small depression in the flesh, either one that exists permanently or one that forms in the cheeks when one smiles. Which muscle causes this effect?

zygomaticus major

what muscles cause depression of the mandible?

digastric

What muscle causes flexion of the neck?

sternocleidomastoid

Chewing mastication, what movement is occurring at the jaw?

depression/elevation

What muscle raises the upper lip?

levator labii superioris

Which muscle is an extensor of the neck?

splenius capitis

Which of the following muscles do NOT move the neck? scalenes sternoclediomastoid sternohyoid splenius capitis

sternohyoid

left; medial rectus

The right eye is moving _____ because of the ____ muscle.

The ____ muscle, named for its two bellies, opens the mouth.

digastric

The prime mover of spinal extension is the:

erector spinae

What muscles are involved in flexion of the torso?

rectus abdominis and psoas major

If you are working out abs and performing the russian twist, what movement occurs?

rotation

which muscles extends the torso? psoas major splenius capitis external oblique spinalis

spinalis

what are the muscles that causes lateral flexion (bending) of the torso? muscles contract to bend to opposite (left) side

external and internal oblique (anterior part) external and internal oblique (lateral part) quadratus lumborum

Which movement (forwards) occurs at the torso?

flexion

The largest muscle of the upper back is the:

trapezius

A muscle that aids in chewing without moving the mandible?

buccinator