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MS2 NEURO

CHS 56, 58-60

TermDefinition
autonomic nervous system (ANS) governs involuntary functions of cardiac muscle, smooth muscle, and glands
blood-brain barrier physiologic barrier between blood capillaries and brain tissue
central nervous system (CNS) c/o brain, spinal cord, and cranial nerves I and II
cerebrospinal fluid (CSF) fluid circulating within the subarachnoid space that surrounds brain, brainstem, spinal cord; provides cushioning for brain, spinal cord & allows fluid shifts from cranial cavity to spinal cav; carries nutrients
cranial nerves CNs 12 paired nerves c/o cell bodies w/ fibers that exit from cranial cavity; some have only afferent, others efferent & some both
dermatome area of skininnervated by sensor fibers of a single dorsal root of a spinal nerve
glial cells (glia or neuroglia) provide support, nourishment, & protection to neurons div into microglia and macroglia (astrocytes and oligodendrocytes)
lower motor neurons (LMN) final common pathway in which descending motor tracts influence skeletal muscle
meninges 3 layers of protective membranes that surround the brain and spinal cord
neurons primary functional unit of the nervous system characterized by: 1)excitability 2)conductivity, & 3)influence
neurotransmitters chemicals affecting the transmission of impulses across the synaptic cleft
peripheral nervous system (PNS) c/o cranial nerves III to XII, spinal nerves, peripheral components of ANS
reflex involuntary response to stimulus
synapse structural and functional junction between 2 neurons
upper motor neurons (UMN) originate in cerebral cortex and project downward; corticobulbar tract ends in brainstem & corticospinal tract descents into spinal cord
Created by: JaeLaw23