Explanation The cranial nerves III, IV, as well as VI are the motor nerves that control and regulate the muscles that are involved in the movement of the eyeballs. The sensory nerve cells that arise from the extrinsic eyeball muscles move toward the brain in each of these cranial nerves. However, the sensory axons leave the neurons to join with the trigeminal nerve's ophthalmic branch. In these cranial nerves (trochlear nerve, oculomotor nerve, or abducens nerve), the sensory axons do not come back to the brain. The unipolar sensory neuron's cell bodies lie in the mesencephalic nucleus and via trigeminal nerve (cranial nerve V) they enter the midbrain...

15th Edition

ISBN: 9781119329398

Author: Gerard J Tortora, Bryan Derrickson

Publisher: John Wiley & Sons Inc

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Question

Chapter 14, Problem 28CP

Summary Introduction

To review:

The functional relationship between the oculomotor, trochlear, and abducens nerves.

Introduction:

The cranial nerves III, IV, as well as VI, that is, the oculomotor nerve, the trochlear nerve, and the abducens, respectively, are the motor nerves. These nerves contain the axons of the motor nerve cells when they leave the brainstem.

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Chapter 14, Problem 27CP

Chapter 14, Problem 29CP

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Solution Summary: The author explains the functional relationship between the oculomotor, trochlear, and abducens nerves.

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