NEET Exam > NEET Questions > Purely motor cranial nerve includes :-a)I, V,...
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Purely motor cranial nerve includes :-
- a)I, V, VII
- b)I, II, IV
- c)III, IV, VI, XI
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
Purely motor cranial nerve includes :-a)I, V, VIIb)I, II, IVc)III, IV,...
Motor neuron is the type of neuron which carries information from CNS to muscles to give the response to the stimulus.
There are 5 pairs of pure motor cranial neurons present in human-like :
III - oculomotor - origins at the floor of midbrain - helps in eyeball movement and accommodation.
IV - trochlear - origins at the floor of midbrain - helps in eyeball movement. VI - abducens - origins at the floor of medulla oblongata - helps in the lateral movement of the eyeball.
XI - spinal accessory - origins from the side of medulla oblongata - helps in neck movement, shoulder and visceral reflexes.
XII- hypoglossal - origins from the side of medulla oblongata - helps in tongue movement.
Most Upvoted Answer
Purely motor cranial nerve includes :-a)I, V, VIIb)I, II, IVc)III, IV,...
Correct is 'C'-there are 4 purely motor cranial nerve lV-muscle of eyeball
Vl-innervates lateral muscle of eyeball and abducts of eye
Xl-innervates the trapeziums muscle
lll-provides motor function for all eye ball except lV&Vl
there is one more
Xll-innervates muscle of tongue.
"guess it'll help":)
Vl-innervates lateral muscle of eyeball and abducts of eye
Xl-innervates the trapeziums muscle
lll-provides motor function for all eye ball except lV&Vl
there is one more
Xll-innervates muscle of tongue.
"guess it'll help":)
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Community Answer
Purely motor cranial nerve includes :-a)I, V, VIIb)I, II, IVc)III, IV,...
Purely motor cranial nerves include III, IV, VI, and XI.
Explanation:
Cranial nerves are a set of twelve nerves that emerge directly from the brain or brainstem and control various functions in the head and neck. They are divided into sensory, motor, and mixed nerves based on their functions. Purely motor cranial nerves are those that control only motor functions and do not have a sensory component.
The purely motor cranial nerves are:
III - Oculomotor nerve: This nerve controls the movement of the eye muscles that enable upward, downward, and inward eye movements and controls the size of the pupil.
IV - Trochlear nerve: This nerve controls the superior oblique muscle of the eye, which rotates the eye downward and away from the midline.
VI - Abducens nerve: This nerve controls the lateral rectus muscle of the eye, which moves the eye away from the midline.
XI - Accessory nerve: This nerve controls the movement of the sternocleidomastoid and trapezius muscles, which are involved in head and shoulder movements.
Option C includes all these four nerves, making it the correct answer to the question.
Explanation:
Cranial nerves are a set of twelve nerves that emerge directly from the brain or brainstem and control various functions in the head and neck. They are divided into sensory, motor, and mixed nerves based on their functions. Purely motor cranial nerves are those that control only motor functions and do not have a sensory component.
The purely motor cranial nerves are:
III - Oculomotor nerve: This nerve controls the movement of the eye muscles that enable upward, downward, and inward eye movements and controls the size of the pupil.
IV - Trochlear nerve: This nerve controls the superior oblique muscle of the eye, which rotates the eye downward and away from the midline.
VI - Abducens nerve: This nerve controls the lateral rectus muscle of the eye, which moves the eye away from the midline.
XI - Accessory nerve: This nerve controls the movement of the sternocleidomastoid and trapezius muscles, which are involved in head and shoulder movements.
Option C includes all these four nerves, making it the correct answer to the question.
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Purely motor cranial nerve includes :-a)I, V, VIIb)I, II, IVc)III, IV, VI, XId)None of theseCorrect answer is option 'C'. Can you explain this answer?
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