BIOB33H3 Chapter Notes - Chapter 5: Posterior Parietal Cortex, Arachnoid Mater, Auditory Cortex

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20 Mar 2013
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Specific pathways for transmission of signals between areas of body. Interacts with endocrine system (wireless: organization of nervous system. Central nervous system (cns: brain and spinal cord. Afferent: in afferent division of pns, peripheral end has a sensory receptor, generates aps in response to a stimulus, cell body near spinal cord, synapses with other neurons in spinal cord. Efferent: in efferent division of pns, cell body in cns, terminates at a muscle or gland. Interneurons (most neurons: in cns, between afferent and efferent neurons, interconnect with one another, protection /nourishment of the brain. Bones offer physical protection: cranium (skull) - brain, vertebral column - spinal cord brain structure, cerebrum. Cortex is outer layer of gray matter (neuron cell bodies and dendrites, glial cells) Underneath is white matter (tracts of myelinated fibers), which transmits signals between cortical areas, and to other cns locations. Divided into functional areas (some degree of overlap) specialized for particular activities, but no area acts alone.

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