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BRAIN STEM- MEDULLA

BRAIN STEM- MEDULLA. Brainstem. Performs spinal cord-like functions for the head Contains LMN for head muscles Initial processing of general afferent information concerning head. Conduit function. Ascending tracts reach thalamus and cerebellum Descending tracts reach spinal cord

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BRAIN STEM- MEDULLA

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  1. BRAIN STEM- MEDULLA

  2. Brainstem • Performs spinal cord-like functions for the head • Contains LMN for head muscles • Initial processing of general afferent information concerning head

  3. Conduit function • Ascending tracts reach thalamus and cerebellum • Descending tracts reach spinal cord • Many tracts do not run through straight- frequent involvement of relay nuclei

  4. Cranial nerve functions • Cranial nerves are head’s equivalent of spinal nerves • Involved in olfaction, sight, hearing, equilibrium and taste • Olfactory → telencephalon • Optic → diencephalon

  5. The rest project to or emerge from brainstem • Collection of sensory and motor nuclei related to cranial nerve function at various levels in brainstem

  6. Integrative function • Complex motor patterns • Regulation of cardiovascular and respiratory activity • Some regulation of consciousness [function of reticular formation in central core of brainstem]

  7. Level of pyramidal decussation

  8. Level of sensory decussation

  9. Components of inferior cerebellar peduncle

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