Exam 4 - Head and Neck Part 2

what forms the floor of the temporal region

frontal, parietal, temporal, and sphenoid bone

what forms the roof of the temporal region

temporal fascia and investing deep fascia of the temporalis muscle

what muscles are found in the temporal region

temporalis and masseter

what forms the lateral boundary of the infratemporal region

internal surface of ramus of mandible

what forms the inferior boundary of the infratemporal region

medial pterygoid attachment to the mandible

what is the innervation of the muscles of mastication

mandibular division of CN 5 (V3)

what is the function of the temporalis muscle

retract, elevate, lateral movement

what is the function of the lateral pterygoid muscle

depression, lateral movement

what is the function of the masseter

elevate, protract, retract, lateral movement

what is the function of the medial pterygoid

elevation, lateral movement

t/f

the intra-articular disc is completely separated from the articular surface of the temporal bone and condyle of the mandible

true

what kind of joint is the TMJ

synovial

what is the nerve supply of the tmj

auriculotemporal and masseteric

what are the extracapsular ligaments which support the tmj

temporomandibular, stylomandibular, sphenomandibular

the temporomandibular ligament is a thickening of what? the stylomandibular ligament is a thickening of what? the sphenomandibular ligament is a portion of what cartilage?

fibrous capsule

deep cervical fascia

Meckel's cartilage

what movements are allowed by the upper portion of the articular disc in the tmj

gliding, protrusion, retrusion

what movements are allowed by the lower portion of the articular disc of the tmj

hinge movements (open and close)

what forms the superior boundary of the orbit

lesser wing of sphenoid and orbital plate of frontal bone

what opening is found in the superior boundary of the orbit

optic canal

what forms the medial boundary of the orbit? What opening is found in this boundary?

ethmoid, frontal, lacrimal, sphenoid

fossa for lacrimal sac

what forms the lateral boundary of the orbit? What opening is found within this boundary?

greater wing of sphenoid and frontal process of zygomatic bone

superior orbital fissure

what forms the inferior boundary of the orbit? what opening is found within?

maxillary, zygomatic, palatine

inferior orbital fissure

the superior orbital fissure is between which structures? what about the inferior?

greater and lesser wing

greater wing and maxilla

what attaches the tarsus to the walls of the orbit

medial and lateral palpebral ligaments

tarsal (meibomian) glands are found where? what kind of gland are they?

tarsus

sebaceous glands

what do tarsal glands secrete

meibum to prevent evaporation of tears

what condition can occur with a blocked meibomian gland

chalazion

what glands are found at the eyelash base and what do they secrete?

ciliary gland

aqueous humour to nourish cornea and lens

what condition can occur when there is a blocked ciliary gland

stye

what are the palpebra conjunctiva continuous with? what does the intersection of these two structures form?

bulbar conjunctiva

superior and inferior fornix

the superior and inferior lacrimal papilla contain openings called? what do these do?

lacrimal punctum

drain excess tears

what is the order of tear drainage

1. lacrimal gland

2. 3-9 excretory ducts open into superior fornix

3. lacrimal punctum

4. lacrimal canaliculi

5. lacrimal sac

6. nasolacrimal sac

7. inferior nasal meatus

what is the structure which divides the anterior and posterior chambers

iris

the chambers of the eye are continuous with what

aqueous humor

what produces aqueous humor? where is it secreted into? from here, where does it go? Where does it exit?

ciliary body

posterior chamber

anterior chamber

scleral venous plexus

what does a build-up of aqueous humor in the anterior chamber cause

glaucoma

what is the blood supply of the internal eye? what drains it?

ophthalmic artery

superior and inferior ophthalmic vein

what innervates the ciliaris and sphincter pupillae

parasympathetic fibers of oculomotor nerve

what innervates the dilator pupillae and surround internal carotid artery

sympathetic fibers of t1/2 lateral horn neurons