The special route and effect of pain signals that involve the reticular formation; how responses to these signals differ from other responses to pain. Introduction: Somatosensory signals like facial sensations (from head) reach the pons and medulla oblongata through various cranial nerves. The first-order nerve fibers of these somatosensory neurons synapse with the second-order neurons in the brainstem. Most of these neurons (second-order somatosensory) synapse with the third order in the contralateral thalamus. The third-order somatosensory neurons complete the pathway to the brain (cerebrum). The second-order nerve fibers carry the proprioceptive signals (from head) to the cerebellum.

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Chapter 16.2, Problem 11AYLO

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The special route and effect of pain signals that involve the reticular formation; how responses to these signals differ from other responses to pain.

Introduction:

Somatosensory signals like facial sensations (from head) reach the pons and medulla oblongata through various cranial nerves. The first-order nerve fibers of these somatosensory neurons synapse with the second-order neurons in the brainstem. Most of these neurons (second-order somatosensory) synapse with the third order in the contralateral thalamus. The third-order somatosensory neurons complete the pathway to the brain (cerebrum). The second-order nerve fibers carry the proprioceptive signals (from head) to the cerebellum.

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