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20 Cards in this Set
- Front
- Back
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what is the reticular formation
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continuation of central gray matter of cord (column of cells)
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where does the reticular formation receive information from
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everywhere
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where do the fibers of the pontine RF and the medullary RF go to and what do they do
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ventral horn cells
control motor activity of locomotion and posture |
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where do 1/3 of the fibers in the corticospinal tract come from
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sensory fibers
sensory fibers come into the cord cortex controls its own input |
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how does the cortical output activate and inhibit for movement
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through basal ganglia
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what would happen with a lesion in the basal ganglia
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inadequate output
could lead to excessive movement |
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what are the UMN signs
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hyperreflexia
hypertonia clonus spastic paralysis rigidity |
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where are the LMN located
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ventral horn (skeletal m) of gray matter
lateral horn parasympathetic nuclei in brain stem |
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axons go out to innervate what
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skeletal muscle
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what are the peripheral fibers of the LMN
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extensions of cell body in nucleus
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what are the causes of LMN not working
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lack of genetic ability to stop Ab from attaching Ach receptors
crunch of nerve motor fibers lack of UMN from firing dz affecting LMN (distal m) |
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what is the first thing to suffer if the nerve cell has a lack of energization
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Na/K pump
becomes less negative rises closer to threshold easier to polarize and more sensitive |
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what does a fasciculation in a muscle mean
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UMN lesion
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what is a fibrilation
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individual contraction of a single muscle fiber
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what does the frontal lobe do
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controls sensory input
can block out outside input thru inhibiting thalamus |
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what is the tectum
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roof
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what is the tegmentum
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floor of brainstem
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what is receptive dysphasia
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problem with language
wernicke's area in superior/posterior temporal lobe |
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what is expressive aphasia
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problem with expressing language
broca's motor speech area (understand what they say but is not what they wanted to say) |
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where is the right anterior cingulated cortex
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just above the corpus callosum
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