Cranial nerves II, III, IV and VI are A. the optic, oculomotor, trochlear, and abducens nerves B. the optic, oculomotor, trigeminal, and abducens nerves C. all mixed (sensory and motor) nerves D. all sensory (only) nerves

The correct answer is A. Cranial nerves II, III, IV and VI are the optic, oculomotor, trochlear, and abducens nerves.

Explanation:

The cranial nerves have been classically considered to consist of twelve (12) pairs of nerve trunks, which have their apparent origins on the brain surface and, after more or less long paths inside the cranial cavity leave this through holes located in the cranial base to reach their innervation areas.

Cranial nerve II (the optic) is responsible for transmitting the visual information that we capture through the photoreceptors of the retina to the rest of the brain in order to process and interpret it. It originates in the diencephalon.

Cranial nerve III (oculomotor) is responsible for controlling eye movement and is responsible for pupil size. It originates in the midbrain.

Cranial nerve IV (trochlear) is the smallest of the exclusively motor cranial nerves that innervates only the major oblique muscle of the eye.

Cranial nerve VI (abducens) is an exclusively motor nerve, destined for the muscle of the inner rectum of the eye. It emerges from the bulboprotuberancial groove.

Cranial nerves I, II and VIII are dedicated to special sensitive references.

Cranial nerves III, IV and VI control eye movements, photomotor reflexes and accommodation.

Cranial nerves V, VII, IX and X are mixed.

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