DPT 604 Human Anatomy II Flashcards

Flashcards based on DPT 604 Human Anatomy II lecture notes, focusing on muscles of the eye and cranial nerves.

What nerves control the muscles of the eye?

CN III Oculomotor, CN IV Trochlear, CN VI Abducens

Which cranial nerve controls the superior rectus muscle, and what is its action?

CN III Oculomotor, UP

Which cranial nerve controls the inferior rectus muscle, and what is its action?

CN III Oculomotor, DOWN

Which cranial nerve controls the medial rectus muscle, and what is its action?

CN III Oculomotor, INWARD

Which cranial nerve controls the inferior oblique muscle, and what is its action?

CN III Oculomotor, UP and OUT

Which cranial nerve controls the lateral rectus muscle, and what is its action?

CN VI Abducens, External Rotation Horizontal plane

Which cranial nerve controls the superior oblique muscle, and what is its action?

CN IV Trochlear, DOWN & IN

How many bones form the orbit?

7 bones

List the bones that form the orbit

Sphenoid, Ethmoid, Lacrimal, Frontal, Palatine, Maxillary, Zygomatic

List the cranial nerves.

CN I Olfactory, CN II Optic, CN III Oculomotor, CN IV Trochlear, CN V Trigeminal, CN VI Abducens, CN VII Facial, CN VIII Vestibulocochlear, CN IX Glossopharyngeal, CN X Vagus, CN XI Spinal Accessory, CN XII Hypoglossal

Which CNs are associated with the muscles of facial expression?

Facial Nerve CN VII

Which CNs are associated with the muscles of chewing?

Trigeminal Nerve CN V3

Where is the cribiform plate and what is its function?

Superior part of the ethmoid bone. It is sieve-like and the place holder for the olfactory bulbs, permitting odors to contact the olfactory bulbs.

Acoustic neuroma (tumor of 8th cranial nerve) enters the temporal bone. Which other cranial nerve could be involved as it travels through the same foramen?

Facial Nerve (CN VII)

A patient has paralysis of her left face, is unable to close the left eye, and has a drooped lip but has facial sensation. Which cranial nerve is suspected?

Left Facial Nerve (CN VII)

A patient with periodic double vision can turn his right eye inward but not down. Which nerve is most likely involved?

Trochlear Nerve (CN IV)

Which way would you have her patient turn the eye to confirm Abducens nerve function?

Outward

Starting with the eyes straight ahead, you would have the patient look which way to test for trochlear nerve integrity?

In and down

What is the nerve responsible for facial expression?

Facial Nerve, CN VII

What is the nerve responsible for sensation to the face?

Trigeminal Nerve, CN V

What nerve innervates levator palpebrae superioris?

CN III Oculomotor

What is Bell’s Palsy?

CN VII Facial nerve palsy. Loss of muscles of facial expression on affected side. The person will have drooping on that side of the face.

What is trigeminal neurolalgia?

CN V Trigeminal Nerve compression causes bouts of severe pain to the sensory area of the division that is affected.

Branches of which nerve convey pain sensation from the skin to the brain?

Ophthalmic V1

Which muscle are temporarily paralyzed?

Zygomaticus major

Which muscle is responsible for, 'food getting stuck between his check and teeth'?

Buccinators