The student nurse is reviewing the cranial nerves. The student recognizes some of the nerves are exclusively sensory nerves. Which of the following cranial nerves belong to this group? Standard Text: Select all that apply
1. Olfactory nerve (cranial nerve I)
2. Optic nerve (cranial nerve II)
3. Trochlear nerve (cranial nerve IV)
4. Trigeminal nerve (cranial nerve V)
5. Facial nerve (cranial nerve VII)
1,2
Rationale 1: Olfactory nerve (cranial cerve I). The cranial nerves may be classified by function. The nerves may be sensory, motor, or mixed. Sensory nerves are responsible for receiving sensory information. Motor nerves allow the body to perform an action. Mixed nerves are able to receive sensory information and perform physical activities. The olfactory nerve is a sensory nerve and is responsible for the sense of smell. The optic nerve is a sensory nerve responsible for vision.
Rationale 2: Optic nerve (cranial nerve II). The cranial nerves may be classified by function. The nerves may be sensory, motor or mixed. Sensory nerves are responsible for receiving sensory information. Motor nerves allow the body to perform an action. Mixed nerves are able to receive sensory information and perform physical activities. The olfactory nerve is a sensory nerve and is responsible for the sense of smell. The optic nerve is a sensory nerve responsible for vision.
Rationale 3: Trochlear nerve (cranial nerve IV). The cranial nerves may be classified by function. The nerves may be sensory, motor, or mixed. Sensory nerves are responsible for receiving sensory information. Motor nerves allow the body to perform an action. Mixed nerves are able to receive sensory information and perform physical activities. The trochlear nerve is a motor nerve responsible for eye movement.
Rationale 4: Trigeminal nerve (cranial nerve V). The cranial nerves may be classified by function. The nerves may be sensory, motor, or mixed. Sensory nerves are responsible for receiving sensory information. Motor nerves allow the body to perform an action. Mixed nerves are able to receive sensory information and perform physical activities. The trigeminal nerve is a mixed nerve is responsible for sensory impulses from the lower eyelid, nasal cavity and palate. Motor actions of the trigeminal nerve involve teeth clenching and movement of the mandible.
Rationale 5: Facial nerve (cranial nerve VI). The cranial nerves may be classified by function. The nerves may be sensory, motor or mixed. Sensory nerves are responsible for receiving sensory information. Motor nerves allow the body to perform an action. Mixed nerves are able to receive sensory information and perform physical activities. The facial nerve is a mixed nerve responsible for taste, facial movements, and the production of tears and salivary stimulation.
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