Chapter 10 - Axial Musculature

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Muscles of the head and neck are responsible for

- verbal and non-verbal communication - chewing, swallowing, eating

External intercostals originate on

Bottom of the superior rib and attach to the top of the inferior rib

Which of the following muscles is the prime mover in spitting out a mouthful of liquid?

Buccinator

The lateral pterygoid

Depresses and protracts mandible and moves it from side to side

Sternocleidomastoid muscle

Flexes neck and laterally rotates the head

digastric muscle (posterior belly)

Performs the same function as anterior

During expiration, internal intercostals depress the?

Ribs

During inspiration, external intercostals elevate the?

Ribs

Internal Intercostals originate on

The top of the inferior rib and attach to the bottom of the superior rib

buccinator muscle

assists in mastication by moving the cheeks - Also helps with function of infants when breastfeeding - spitting, blowing air

The word _______ in a muscle name indicates a function related to the head.

capitis

The orbicularis oris muscle is an example of a:

circular muscle

The orbiculares oculi

closes eyes, squints, blinks, winks

The orbiculares oris

closes lips

The depressor anguli oris

depresses corner of mouth

Superior oblique muscle

depresses eye and turns it laterally

omohyoid muscle

depresses hyoid and larynx

sternohyoid muscle

depresses hyoid and larynx

digastric muscle (anterior belly)

depresses the mandible and elevates the larynx

The temporoparietalis moves the

ear

The masseter

elevates and protracts mandible; also moves jaw side-to-side

The temporalis

elevates and retracts the mandible; also moves jaw side-to-side

inferior oblique muscle

elevates eye and turns it laterally

mylohyoid muscle

elevates hyoid bone and floor of mouth when swallowing; sometime depresses mandible

stylohyoid muscle

elevates larynx

The medial pterygoid

elevates mandible and moves it from side to side

The prime mover of spinal extension is the:

erector spinae

Cranial Nerve VII innervates muscles of

facial expression

Muscles of the vertebral column perform

flexion and extension

The oblique thoracic region consists of

internal and external intercostals

The oblique abdominal region consists of

internal and external oblique and transversus abdominis

Difference between internal and superficial muscles is that

internal muscles are smaller than superficial

In occipitofrontalis the frontal belly

raises eyebrows, wrinkles forehead

In occipitofrontalis the occipital belly

retracts and tenses scalp

The oblique cervical region consists of

scalenes

Which of the following muscles is NOT involved with moving the jaw?

sternocleidomastoid

oblique and rectus muscles form wall of the

thoracic and abdominopelvic cavity


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