A nurse shines a light into a patient's eye. Which pathway carries visual impulses from the retina toward the brain?
Correct answer: A. Optic nerve
- A. Optic nerve
- B. Oculomotor nerve
- C. Trigeminal nerve
- D. Facial nerve
Explanation
Retinal neurons transmit visual information through the optic nerve, cranial nerve II, toward the optic chiasm and visual centres. The oculomotor nerve controls several eye movements and pupil responses but does not carry the primary visual signal.
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About Nervous System and Special Senses
The nervous system covers neurons, neuroglia, nerve impulses, synapses, reflex arcs, and the organization of the central and peripheral nervous systems. It also explains the autonomic divisions and the receptors and pathways for vision, hearing, balance, taste and smell, distinguishing sensory reception from conscious perception.
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