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22 Cards in this Set

  • Front
  • Back
injury to the area between the cerebral hemispheres and the spinal cord would damange what main structure?
a stroke in the temporal lobe would cause what impairment?
loss of memory and audition
a patient is diagnosed with a personality disorder. where is the most damage most likely located? what other impairments might you expect?
frontal lobe; motor problems
a stroke in the right frontal lobe would result in what impairment?
loss of motor on the left side of the body.
a patient has problem with vision after an accident. where did the damage most likely occur?
occipital lobe/visual cortex
damage to what structure would cause a problem in the processing of all sensory information before reaching the cortex?
what is the importance of the dendritic spines?
"site of action"
site of synapsis for all incoming, presynaptic inputs;
increases SA
whats the difference b/w upper and lower motor neurons?
upper: in motor cortex of brain; axons travel down spinal cord and synapse with lower motor neurons. axons of lower motor neurons travel to target and synapse on mm.
most neurons are of what type?
95% are interneurons: integrate information
why are sensory neurons called pseudounipolar?
they have 1 process off the cell body that splits into 2: one carries info from target to cell body; other carries info from cell body to brain
what is the "honda H"?
gray matter in the spinal cord composed of cell bodies; white matter surrounding it is composed of myelinated axons (glia)
how do sensory neurons enter and motor neurons leave the spinal cord?
(dorsal)ventral rootlets to root-> spinal nerve-> target mm
what occurs at the n/m jxn?
motor neurons rel ACh onto cholinergic nicotinic receptors that are clustered around the motor end plate
how do sensory neurons communicate with motor neurons in the spinal cord?
sensory neurons synapse on interneurons which then synapse on motor neurons
what are the types of interneurons?
projection and local
local remain within a given tissue
projection can project farther (ex: from spinal cord to thalamus)
what would happen if you cut the motor neuron involved in a n/m jxn and why?
the nicotinic receptors would disperse from the n/m jxn because the motor neuron was releasing something to keep them there
what type of information do the dendritic spines receive and convey?
they receive local potentials (excitatory post-synpatic potential, IPSP)
if EPSP>IPSP then they trigger the cell body to send an action potential
what are the glial cells of the CNS?
microglial cells
fxn of astrocytes?
maintain homeostasis of neurons (ex: if incr ECF K+, the neurons would depolarize!)
major source of GF
fxn of oligodendrocytes?
fxn microglial cells
immune-like cells
can be activated to rel cytokines
involved in inflammation and fighting infection
what are the glial cells of the PNS and what are their fxns?
Schwann cells-myelination; also provide GF support for neurons (there are myelinating and non myelinating schwann cells)
satellite cells-next to cell bodies; ensheath cell bodies and provide nutrients