To discuss:
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 Solutions
LSC (CONCORDIA UNIV ST PAUL) BIO 315/316: B&N DPF Connect with APR and Phils Online Access for Anatomy and Physiology: The Unity of Form and Function 180 Day Access ENTRP
- How one action potential triggers another; how the continuous conduction seen in unmyelinated nerve fibers result from a chain reaction of action potentials; and what normally prevents the signal from traveling backward to the neurosoma.arrow_forwardIn the simplest kind of reflex______, directly signal ________, which act on muscle cells. a. sensory neurons; interneurons b. interneurons; motor neurons c. sensory neurons; motor neurons d. motor neurons; sensory neuronsarrow_forwardTrue or False; a unique feature of the optic tract compared to other cranial nerves is that it is an extension of the brain and are covered in meningeal layers.arrow_forward
- Locations of the gray and white matter in the cerebrum and cerebellum; the composition of gray and white matter and how this relates to their colors; and the meaning of cortex, nucleus, and tract in relation to brain gray and white matterarrow_forwardThe particular glial cells that engulf cellular debris and trigger inflammation aremicroglia.Schwann cells.astrocytes.oligodendrocytes.oligodendroglia.arrow_forwardSensation and Perception, say how or where they overlap (if they overlap). in addition examples may be givenarrow_forward
- How the sensory somatic nervous system reacts by reflex to a person touching something hot.How does this allow for rapid responses in potentially dangerous situations?arrow_forwardLivingston book (Improvising Medicine) Drawing on Livingston’s discussion in chapter 5, “Pain and Laughter,” discuss why global health policies and practices have largely ignored the problem of pain and palliation in the global south. Give at least two examples from the text that support your claims.arrow_forwardTrue or false: Only some, not all, LGN neurons project axons to primary visual cortex.arrow_forward
- Human Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage Learning
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