Cranial Nerve Localisation: 5 Interactive NEET PG MCQs

Evergreen NEET PG Preparation Update • Interactive practice • Last reviewed: 20 September 2026

No new material 2026-cycle notice was identified on the official NBEMS/MCC portals during this review. This original solve-first set is therefore published as preparation content, not as breaking news.

MCQ 1

A patient cannot abduct the right eye. Which nerve is most likely affected?

Correct: C — Right abducens nerve.
CN VI supplies lateral rectus, which abducts the ipsilateral eye. CN III supplies most other extraocular muscles; CN IV supplies superior oblique. Memory point: LR6, SO4, all others 3.

MCQ 2

Loss of the corneal reflex occurs when touching the right cornea, but either cornea touched can still produce left-eye blinking. The most likely lesion is:

Correct: B — Right V1 afferent limb.
The corneal reflex afferent limb is V1 and the efferent blink is CN VII. Failure only when the right cornea is stimulated localises to right V1; preserved left blinking confirms the left VII efferent pathway.

MCQ 3

A right hypoglossal lower motor neuron lesion causes the protruded tongue to deviate:

Correct: A — Toward the lesion.
Weak right genioglossus cannot oppose the left, so the tongue points right on protrusion. LMN lesions may also cause ipsilateral wasting and fasciculation.

MCQ 4

Which finding most strongly suggests a right vagus nerve palsy?

Correct: D.
With right palatal weakness, the intact left palate pulls the uvula away from the lesion. Tongue deviation instead implicates CN XII; ptosis with mydriasis suggests CN III.

MCQ 5

A lesion at the optic chiasm classically produces:

Correct: B — Bitemporal hemianopia.
Crossing nasal retinal fibres carry temporal visual fields and are compressed at the chiasm. A post-chiasmal lesion produces a contralateral homonymous defect; an optic nerve lesion causes monocular loss.

Score: 0/5

Attempted: 0 of 5

Sources and scope

Concepts were checked against the NCBI Bookshelf cranial nerve examination review. Questions are original and are not copied from a commercial question bank.

Evergreen NEET PG Preparation Update: Cranial Nerve Lesion Localisation — 5 Interactive MCQs