Skull & Face Slides

List the cranial bones

frontal, temporal, occipital, parietal, sphenoid, ethmoid

List the bones of the orbit

frontal bone, sphenoid bone, palatine bone, zygomatic bone, lacrimal bone, ethmoid bone, maxilla bone

What is the structure and joint function of sutures?

fibrous joint, synarthrotic joint

List the function of the trachea

conducts air to and from lungs, involved in coughing and airway clearance

What is the structure of the trachea?

C shaped hyaline cartilage

What type of joint is the temporomandibular joint?

synovial, modified hinge

List the motions of the temporomandibular joint

elevation/depression, R/L deviation, protrusion/retrusion

What keeps the temporomandibular joint stable?

articular disc, collateral ligaments, and joint capsule

List the cervical flexors

sternocleidomastoid and the scalene group

What is the largest muscle in the neck?

sternocleidomastoid (2 heads: sternal and clavicular)

What muscle group is deep to the sternocleidomastoid?

the scalenes (anterior, middle, posterior)

Where are the scalenes located?

between the SCM and anterior flap of trapezius

What is the strongest muscle in the body relative to size?

masseter , sits deep to parotid gland

What two bony landmarks help identify the masseter?

zygomatic arch, mandible ramus

Where is the temporalis located?

passes beneath zygomatic arch

What is the action of the temporalis?

elevate and retract the mandible

What is the action of the frontalis?

raise the eyebrows and wrinkle the forehead

What is the origin and insertion of the frontalis?

O: galea aponeurotica

I: skin superior to the eyebrows

What is the frontalis innervated by?

facial nerve (VII)

What is the action of the pterygoids?

lateral jaw movement and protraction W

What are the pterygoids innervated by?

trigeminal nerve (CN V)

What is the action of the suprahyoids?

elevate hyoid and tongue, depress mandible (TMJ joint)

What is the origin and insertion of the suprahyoids?

O: underside of mandible and styloid process

I: hyoid bone

What is the suprahyoids innervated by?

C1, C2, Trigeminal (V), and Facial (VII)

What is the action of the digastric?

hyoid bone fixed: depress the mandible (TMJ)

mandible fixed: elevate the hyoid bone

retract the mandible

What is the origin and insertion of the digastric/

O: mastoid process (deep to sternocleidomastoid and splenius capitis)

I: inferior border of the mandible

What is the digastric muscle innervated by?

anterior belly: trigeminal (V) & Facial (VII)