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Questions and Answers
Which of the following cranial nerves arises from the posterior aspect of the midbrain?
Which of the following cranial nerves arises from the posterior aspect of the midbrain?
- Oculomotor nerve
- Trigeminal nerve
- Abducens nerve
- Trochlear nerve (correct)
Which of the following is NOT a function of the brain stem?
Which of the following is NOT a function of the brain stem?
- Vital centers in reticular formation
- Sensory, motor, and parasympathetic nuclei
- Control of voluntary movements (correct)
- Passage for ascending and descending tracts
What is the cavity of the hindbrain called?
What is the cavity of the hindbrain called?
- Lateral ventricle
- Cerebral aqueduct
- Fourth ventricle (correct)
- Third ventricle
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Study Notes
- Brain stem consists of medulla oblongata, pons, and midbrain.
- Fourth ventricle is the cavity of the hindbrain.
- Brain stem is a passage for ascending and descending tracts.
- Cranial nerves arise from different areas of the brain stem.
- Brain stem has sensory, motor, and parasympathetic nuclei.
- Brain stem has vital centers in reticular formation.
- Trochlear nerve arises from the posterior aspect of the midbrain.
- Hypoglossal nerve arises from the groove between the olive and pyramid.
- Medulla oblongata is divided into 4 levels/sections.
- Closed and opened medulla have different cavities and structures.
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