Chapter 10 - Axial Musculature
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