UAG - Nervous system
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| show | Central Nervous System (CNS) - brain and spinal cord<P><P><P>Peripheral Nervous System (PNS) - remainder of nervous system outside of the CNS
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| Functional Nervous System | show 🗑
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| Nervous Tissue | show 🗑
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| show | structural & functional units of nervous system for rapid communication; cell body with dendrites (impulses to body) & an axon (impulses away from body)<P>myelin sheath=myelin(layers of lipid) + protein substances to increase velocity of impulses
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| Multipolar motor neurons | show 🗑
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| show | short, apparently single (but double), process extending from cell body; into peripheral process conducting from receptor organ (touch/pain/temp) toward the cell body & a central process continuing from cell body in CNS; outside CNS in sensory ganglia
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| Neuroglia (glial cells/glia) | show 🗑
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| show | brain and spinal cord; integrate & coordinate incoming and outgoing neural signals & to carry out higher mental functions (thinking & learning)
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| show | made of nerve cell bodies in the CNS=nucleus; in transverse section of spinal cord, gray matter appears to be an "H" in the white matter; right & left posterior(dorsal)/anterior(ventral) horns=supports of the "H"
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| show | interconnecting fiber tract system (bundle of nerve fibers/axons within the CNS connecting neighboring or distant nuclei of cerebral cortex)
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| show | 1. Pia Mater - innermost, delicate, transparent layer
<P>2. Arachnoid Mater - middle layer
<P>3. Dura Mater - thick, tough layer<P><P><P>Cerebrospinal fluid (CSF) is b/w pia mater & arachnoid mater
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| Peripheral Nervous System (PNS) | show 🗑
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| Nerve Fiber | show 🗑
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| Nerve Fiber - classes | show 🗑
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| Nerve tissue coverings | show 🗑
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| PNS afferent (sensory) fibers | show 🗑
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| PNS efferent (motor) fibers | show 🗑
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| show | exit the cranial cavity through foramina (openings), identified by descriptive name or Roman numeral; 11 of the 12 pairs arise from the brain, the other pair arises from the superior part of the spinal cord
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| show | exit the vertebral column (spine) through intervertebral foramina; bilateral pairs from specific segment of the spinal cord; 31 spinal cord segments & 31 pairs of nerves are identified by letter & number (Cervical, Thoracic, Lumbar, Sacral, Coccygeal)
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| show | arise from rootlets & converge to form 2 nerve roots<P>1.Anterior(ventral) =motor(efferent)fibers, from nerve cell bodies to effector organs<P>2.Posterior(dorsal) =sensory(afferent)fibers from cell bodies in spinal sensory to spinal cord gray matter
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| show | 1. Posterior (1*)=supply nerve fibers to synovial joints of spine, deep muscles of back, & overlying skin in segmental pattern<P>2. Anterior (1*)=supply nerve fibers to larger remaining area, anterior/lateral regions of trunk & UL/LL, most merge together
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sgarcia31
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