Head and Neck Anatomy Exam 2

skeletal muscle tissue

The muscular system includes what kind of tissue

muscle

shortens under neural control, causing soft tissue and bony structures of the body to move

according to its role in movement

Muscle is attached at both ends of these moving sutrctures, and each end is categorized how

origin

the end of the muscle that is attached to the least moveable structure

insertion

the other end of the muscle and is attached to the more moveable structure

toward the origin

where does the insertion of the muscle generally move

action

the movement that is accomplished

voluntary

Are striated skeletal muscles voluntary or involuntary

somatic nervous system

striated skeletal muscles are under the control of what system

fascicles

muscles bundles

myofiber

muscle cells that extend the length of the muscle

myofibril

organelles of the cell

superficially

The sternocleidomastoid muscle and the trapezius muscle are BLANK located

sternocleidomastoid muscle and trapezius muscle

What holds and stabilizes the head and positions the head in relation to the rest of the body

sternocleidomastoid muscle

whats the largest, superficial paired, and thick muscle

lymph nodes

what is the sternocleidomastoid muscle a landmark for

into anterior and posterior triangles

the sternocleidomastoid muscle divides the neck how

clavicle and sternum

whats the origin of the sternocleidomastoid muscle

mastoid process and superior nuchal line

whats the insertion of the sternocleidomastoid muscle

the head and neck bend to the unilateral side and the face and front of the neck rotate to the contralateral side

For the sternocleidomastoid muscle, what happens if one muscle contracts

the head will flex at the neck and extend at the junction between the neck and skull

For the sternocleidomastoid muscle what happens if both muscles contract

accessory nerve or XI cranial nerve

The sternocleidomastoid muscle is innervated by what nerve

trapezius

what is the broad, flat, triangular, and superficial paired muscle

occipital bone, cervical and thoracic regions

what is the origin of the trapezius

clavicle and scapula

what is the insertion of the trapezius

when the shoulders are shrugged

The trapezius lifts the clavicle and scapula when what occurs

the accessory nerve, and the 3rd and 4th cervical nerves

whats the innervation of the trapezius

cervical

Since the BLANK muscles change the way in which a patients head and neck are positioned, a muscle malfunction in this region may cause the head to move to one side or the other, and the patient may not be able to raise the chin as requested during treatment. Patients also may not be able to sit in ergonomically correct position in the dental chair

additional supports and stabilizers.

If there is a muscle malfunction in the cervical region, what may be needed for the patient

chronic stress upon the muscles from sustained neck posturing or neck movements, possibly with related headaches in the posterior region

Cervical malfunctions are usually from acute trauma such as sports or car accidents. It could also be from what

in superficial fascia of the facial tissue

Muscles of facial expression are superficial paired muscles located where

extraoral examination

Facial muscles are noted during a BLANK, assuring function of these nerves to these muscles

the surface of the skull bone, on the dermis of the skin

All facial muscles originate from where and insert where.