Multiple Choice
Which of the following nerves does not arise from the brachial plexus?
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13. The Peripheral Nervous System
Introduction to the Peripheral Nervous System
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Which of the following is not a motor cranial nerve?
A
Abducens nerve (CN VI)
B
Optic nerve (CN II)
C
Trochlear nerve (CN IV)
D
Oculomotor nerve (CN III)
Verified step by step guidance1
Understand the function of cranial nerves: Cranial nerves can be classified as sensory, motor, or both. Motor cranial nerves primarily control muscle movements.
Identify the cranial nerves listed: Abducens nerve (CN VI), Optic nerve (CN II), Trochlear nerve (CN IV), and Oculomotor nerve (CN III).
Determine the function of each nerve: The Abducens nerve (CN VI), Trochlear nerve (CN IV), and Oculomotor nerve (CN III) are involved in motor functions, specifically controlling eye movements.
Examine the Optic nerve (CN II): The Optic nerve is responsible for vision and is classified as a sensory nerve, not a motor nerve.
Conclude which nerve is not a motor cranial nerve: Based on the functions, the Optic nerve (CN II) is the one that does not have motor functions.
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