Exam Q & A Facial Bones and Sinuses

What is an example of white matter?

Corpus callosum

What divides the cerebrum into right and left hemispheres?

Longitudinal fissure

What is the official name of the ear drum?

Tympanic membrane

What is the shape of the cerebellum?

Shaped like a butterfly

What structure connects the two cerebellar hemispheres?

Vermis

Which sinuses can be seen during an open mouth Waters view?

Sphenoid sinuses

True or False: Gray matter consists of bundles of myelinated axons.

False

What are the largest set of sinuses?

Maxillary sinuses

Which is not a division of the semicircular canals?

Anterior

Which group is not considered a basal ganglia grouping?

Claudiform

How many collections do the ethmoid sinuses have?

3

For an axiolateral oblique position of the mandible, how many degrees do you angle caudad?

15 degrees cephalic

True or False: The vestibule contains the oval window.

True

True or False: The lacrimal bones lie posteriorly on the lateral side of each orbit.

False

The superior and middle nasal conchae are associated with which bone?

Ethmoid bone

What two bones form the bony nasal septum?

Vomer and ethmoid

What is the largest section of the brain?

Cerebrum

Which two items make up the diencephalon?

Thalamus and hypothalamus

What are the only sinuses visible at birth?

Maxillary sinuses

Where does the Waters view of the sinuses exit?

Acanthion

What is the most posterior part of the mandible?

Condyloid process

When doing a Caldwell view for facial bones, how many degrees do you angle?

15 degrees caudad

Where would a physician do a cisternal puncture?

Between occipital bone and C1

At what level does the spinal cord divide into the conus medullaris?

L1-L2

Match the cranial nerve to its function: Trochlear, accessory, vestibulocochlear, vagus.

Trochlear -> eye movement

accessory -> swallowing

vestibulocochlear -> hearing

vagus -> sensory

How much CSF is produced a day in the body?

500 ml

What type of injury results in a sphenoid effusion?

Basal skull fracture

How can you correct the petrous ridges filling the orbits in a modified Waters projection?

Extend the head and neck more

When examining the mandible, if the doctor wanted to see the mentum, how many degrees would you rotate the head?

45 degrees

How can you correct petrous ridges filling the maxillary sinuses in a PA skull X-ray?

Have the patient flex head and neck more

What is defined as a growth arising from a mucous membrane projecting into a cavity?

Polyp

What structures form the TMJ?

Temporal fossa and condyloid process of the mandible

What is the axiolateral oblique projection of the TMJs commonly referred to as?

Laws view

During the Law view of the TMJ, how many degrees is the face rotated towards the table?

15 degrees

What line should be near parallel with the bucky when doing a SIV of the zygomatic arches?

IOML

What portion of the palatine bone helps form a portion of the hard palate?

Horizontal portion

True or False: The mandible starts out as two bones but forms together as one.

True

What is the order of drainage from the ostiomeatal complex for the frontal sinuses?

Ethmoid bulla, middle nasal meatus, inferior nasal meatus, exits the nose

In a tangential position of the zygomatic arches, how many degrees do you rotate the midsagittal plane towards the affected side?

15 degrees

Which facial bone is closely associated with the tear ducts?

Lacrimal bone

True or False: The ethmoid bulla receives drainage from the frontal sinuses.

True

What should the tech have done differently for an AP axial Towne view for the mandible?

Used a 35° caudad angle with the OML

If you experience a tripod fracture, which bone is affected?

Zygoma

Which part of the mastoid connects directly with the mastoid air cells?

Antrum

True or False: The thalamus, most importantly, controls homeostasis.

False

What substance normally fills the subarachnoid space?

CSF

What is the purpose of the basal ganglia?

Moderates intensity of motor functions

For the modified parietoacantial view, where should the petrous ridges be shown?

In the lower half of the maxillary sinuses

True or False: If the Waters view is done correctly, the petrous ridges should be projected immediately below the maxillary sinuses.

True

Which of the meninges are highly vascular?

Pia mater

What is the positioning landmark when discussing the zygomatic bone?

Zygomatic prominence

In a panorex of the mandible, which line should be parallel with the floor?

IOML

True or False: Each hemisphere of the cerebrum has grooves called gyri.

False

What is a multipolar motor neuron?

A neuron with several dendrites and a single axon

What section of the brain is the cerebellum located in?

Hindbrain

How many lobes does each hemisphere of the cerebrum have?

5 lobes

Where should the optic foramen be demonstrated for a Rhese view?

In the lower outer quadrant of the orbit

Which part of the neuron is not included: dura mater, cell body, axon, dendrite?

Dura mater

What is the purpose of the eustachian tube?

Equalizes pressure from within the middle ear to the outside air

Which line should be parallel with the X-ray beam for a superinferior (laxi) view of the nasal bones?

GAL

What is an example of the function of the hypophysis?

Reproductive functions

Which meningeal space is connected to the cerebral ventricle system?

Subarachnoid

When doing a Caldwell view of the sinuses, how many degrees do you angle the tube?

0 degrees

Where is cerebral spinal fluid formed?

Lateral ventricles

Which is the smallest auditory ossicle?

Stapes

True or False: The midbrain is a short constricted portion of the upper brain stem.

True