manifestations of cranial nerves abnormalities

Question 1

Cranial Nerve II (Optic)

Answer 1

(Optic) Vision loss or field deficits (e.g., optic neuritis or stroke).

Question 2

Cranial Nerves III, IV, VI

Answer 2

(Oculomotor, Trochlear, Abducens): Ptosis, strabismus, or diplopia, indicating possible increased intracranial pressure or brainstem lesions.

Question 3

Cranial Nerve VII

Answer 3

(Facial): Facial asymmetry, such as drooping (Bell’s palsy or stroke).

Question 4

Cranial Nerve IX, X

Answer 4

(Glossopharyngeal, Vagus): Dysphagia or absent gag reflex, indicating brainstem damage or neurological diseases.

Question 5

Cranial Nerve XII

Answer 5

(Hypoglossal): Tongue deviation, pointing to lower motor neuron damage.

Question 6

Regions of the Brain Tested:

Answer 6

Cranial nerve assessments primarily test the brainstem (midbrain, pons, medulla oblongata) and areas of the cerebrum (frontal and temporal lobes) where specific cranial nerve nuclei originate.