Questions and Answers
Which of the following cranial nerves arises from the posterior aspect of the midbrain?
Trochlear nerve
Which of the following is NOT a function of the brain stem?
Control of voluntary movements
What is the cavity of the hindbrain called?
Fourth 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.
