Question 1

Cranial nerves are&#8230;&#10;A)Spinal nerves that innervate facial structures&#10;B)Peripheral nerves that emerge from the brain or brainstem&#10;C)Considered part of the central nervous system&#10;D)Nerves from the brainstem that can innervate distal limb musculature

Accepted Answer

Cranial nerves are peripheral nerves that emerge directly from the brain or brainstem, not the spinal cord, and they serve various sensory and motor functions primarily related to the head and neck. They are considered part of the peripheral nervous system, not the central nervous system.

Question 2

If there is a unilateral CN IX/X deficit&#8230;&#10;A)As the soft palate rises during &#34;Ahhh&#34;,the uvula deviates toward the affected side&#10;B)The uvula remains in the midline as the affected side of the soft palate rises&#10;C)As the soft palate rises during &#34;Ahhh&#34;,the uvula deviates toward the unaffected side&#10;D)The uvula does not rise as the soft palate rises

Accepted Answer

When there is a unilateral CN IX/X deficit, the muscles on the affected side cannot contract properly. This means that when the patient says "Ahhh" and the soft palate rises, the uvula deviates toward the unaffected side because the muscles on that side are pulling it up, while the affected side remains relatively immobile.

Question 3

During the Weber Test to detect sensorineural hearing loss&#8230;&#10;A)With tuning fork midline on top of the skull,the vibration seems louder in the unaffected ear&#10;B)The tuning fork placed behind the ear,and air conduction lasts longer than bone conduction&#10;C)With tuning fork midline on top of the skull,air conduction lasts longer than bone conduction&#10;D)With the tuning fork placed behind the ear,the vibration seems louder in the ipsilateral ear

Accepted Answer

In the Weber test, a tuning fork is placed on the midline of the forehead or top of the skull. For individuals with sensorineural hearing loss, the sound is perceived as louder in the unaffected (or less affected) ear. This is because sensorineural hearing loss impairs the ability of the affected ear to perceive sound, making the sound seem louder in the ear with better hearing.

Question 4

Which of the following could result from a dysfunction of cranial nerve (CN) IV?&#10;A)Inability to abduct the eye&#10;B)Homonomous hemianopsia&#10;C)Visual field deficit&#10;D)Diplopia

Accepted Answer

Cranial nerve IV, also known as the trochlear nerve, innervates the superior oblique muscle of the eye. Dysfunction of this nerve can lead to diplopia (double vision) because the superior oblique muscle helps to depress, abduct, and internally rotate the eye. When this muscle doesn't function properly, the affected eye cannot move correctly, leading to misalignment of the visual axes and double vision.

Question 5

If there is unilateral weakness/paralysis of the tongue following CVA,which statement explains why the protruding tongue deviates to the affected side?&#10;A)The affected side of the tongues moves further forward than the unaffected side of the tongue&#10;B)The affected side of the tongue does not translate forward,whereas the unaffected side does movement forward&#10;C)Both sides of the tongue translate forward but the affected side is stiff and immobile&#10;D)The stiff tongue on the affected side prevents both sides from moving forward

Accepted Answer

The affected side of the tongue does not move forward due to muscle weakness or paralysis, while the unaffected side moves normally. This imbalance causes the tongue to deviate towards the weakened or paralyzed side when protruded.

Question 6

The facial motor characteristics that result from a right cerebral CVA include:&#10;A)Facial paralysis of the left side of the forehead and face&#10;B)Ptosis on the right side of the face&#10;C)Facial paralysis of the left side of the face more than forehead&#10;D)Droopy corner of the mouth on the right side

Accepted Answer

The answer of The facial motor characteristics that result from...

Question 7

The inability to elevate the eyelid on one side,termed ptosis,with a droopy eyelid is related to&#8230;&#10;A)Dysfunction of CN III&#10;B)Dysfunction of CN VII&#10;C)Dysfunction of CN IV&#10;D)Dysfunction of CN V

Accepted Answer

Dysfunction of CN III, or the third cranial nerve (oculomotor nerve), can lead to ptosis, which is the inability to elevate the eyelid on one side. This nerve controls most of the eye's movements, including eyelid elevation.

Question 8

If in your visual field exam,the patient is unable to see any objects in the temporal visual field of the right eye and the nasal visual field of the left eye,what is the best description?&#10;A)Temporal homonomous hemianopsia&#10;B)Right homonomous hemianopsia&#10;C)Bitemporal hemianopsia&#10;D)Hemianopsia resulting from right cerebrovascular accident (CVA)

Accepted Answer

The patient is experiencing a loss of vision in the temporal field of the right eye and the nasal field of the left eye, which corresponds to a right homonymous hemianopsia. This condition typically results from damage to the left side of the brain, such as from a stroke or lesion, affecting the optic tract or visual pathways.

Question 9

Which is true of the ocular movement examination?&#10;A)It is testing for CN III,IV,and V&#10;B)CN IV controls adduction of the eye&#10;C)CN III controls abduction of the eye&#10;D)If the right eye is not able to depress in an adducted position,it indicates CN IV dysfunction.

Accepted Answer

CN IV (trochlear nerve) innervates the superior oblique muscle, which is responsible for depression and intorsion of the eye, particularly when the eye is adducted. If the right eye cannot depress when adducted, it suggests a dysfunction of the right CN IV.

Question 10

Which of the following is appropriate in testing for CN II visual field screening?&#10;A)Snellen chart testing&#10;B)Testing the ability to see objects in the peripheral vision&#10;C)Test visual field in both eyes simultaneously&#10;D)Testing for excessive intraocular pressure

Accepted Answer

Testing the ability to see objects in the peripheral vision is the correct method for screening the visual field, which assesses the full horizontal and vertical range of what an individual can see peripherally. This is directly related to the function of the optic nerve (CN II).

Deck 7: Examination and Evaluation of Cranial Nerves