Question

Purely motor cranial nerve includes

• A. I, V, VII
• B. I, II, IV
• C. III, IV, VI, XI
• D. None of the above

Answer 1

The correct option is C III, IV, VI, XI

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.