Neurology
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each of the black spaces below before clicking
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| What organs are catergorized in the CNS? | Brain and Spinal Cord
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| The grey matter contains... | site of neuron cell bodies & synapses
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| The white matter contains... | nerve tract
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| What are the parts of the brain? | cerebrum, cerebellum, pons& medulla, midbrain, and diencephalon
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| How many cranial nerves are in the brain? | 12
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| Where does the spinal cord extend through? | cranial, thorasic, lumbar, and saccral region
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| How many spinal nerves are there? | 31
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| What organs in the PNS? | spinal, cranial nerves and ganglia
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| Sensory fibers of the PNS travel in what direction? | afferent
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| Motor fibers of the PNS travel in what direction? | efferent
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| What components are composed of the neuron? | cell body, dentrite, and axon
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| What is the cell body of a neuron called and what is its function? | it is called a soma and is responsible for metabolic functions
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| What are dendrites? | receptors of synaptic connections- from hundreds to hundreds of other neurons
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| What is an axon? | transmitting process that may have few to many processes
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| What causes the transmission to be one way from axon of inpt cell to dentrite of output cell | because of the properties of synaptic connection
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| What do somatosensory receptors respond to? | sensory receptors respond to stimuli
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| what is the pathway of somatosensory receptors? | pass through spinal cord nerves or brain nerves
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| somatosensory axis | sensory receptors respond to stimuli
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| what is the path of somatosensory axis | pass signals to spinal cord (spinal nn.) or brain (cranial nn.) where is the sensory info from somatosensory axis
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| what is the direction of the sensory info in somatosensory | nerve tracts in cord are ascending
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| what is the motor axis | skeletal muscle responds to output from a- motor neurons of anterior horn of cord grey matter
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| where does motor axis signals originate | output signals originate from cord, from reticular substance of medulla, pons & midbrain, from basal ganglia, from cerebellum, & from cerebral cortex
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| what is the direction of the sensory info for motor | nerve tracts in cord are descending
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| what is integrative component | involves screening out majority of sensory signals (thalamus)
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| what plays a major role in integtative components | synapses play major role in controlling input signals screening many & amplifying others through mechanisms of facilitation & inhibition
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| stored sensory inputs (memory) reside mainly in the cerebral cortex | also a function of synapses
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| what repeated sensory inputs | may facilitate a certain sequence of synapses to such a level of sensitivity that other signals in the brain my excite the same sequence of synapses, independent of any sensory input
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Created by:
lisamarie9
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