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Questions and Answers
Which nerve controls muscles in the eye?
Which nerve controls muscles in the eye?
- Trochlear nerve
- Oculomotor nerve (correct)
- Trigeminal nerve
- Optic nerve
Which nerve conducts sensory impulses from the skin of the face and mucosa of the nose and mouth?
Which nerve conducts sensory impulses from the skin of the face and mucosa of the nose and mouth?
- Optic nerve
- Oculomotor nerve
- Trochlear nerve
- Trigeminal nerve (correct)
Which nerve supplies motor fibers for one external eye muscle?
Which nerve supplies motor fibers for one external eye muscle?
- Oculomotor nerve
- Trigeminal nerve
- Optic nerve
- Trochlear nerve (correct)
Which nerve forms the optic chiasma by partial crossover of fibers?
Which nerve forms the optic chiasma by partial crossover of fibers?
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Which nerve runs from the midbrain to the eye?
Which nerve runs from the midbrain to the eye?
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Study Notes
Cranial Nerves
- There are 12 pairs of cranial nerves that originate from the brain or brain stem, numbered based on where they emerge (front to back).
- The cranial nerves have three functions: sensory, motor, and both.
Mnemonics for Cranial Nerves
- Oh Oh Oh To Touch And Feel Very Good Velvet Ah Heaven
- Some Says Money Matters But My Brother Says Big Boobs Matter Most
Cranial Nerve I: Olfactory Nerve
- Function: carries impulses for the sense of smell
- Origin: fibers arise from olfactory receptors in the nasal mucosa and synapse with the olfactory bulbs, which send fibers to the olfactory cortex
Cranial Nerve II: Optic Nerve
- Function: carries impulses for vision
- Origin: fibers arise from the retina of the eye and form the optic nerve
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