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Motor Speech lecture 2
Basic Neurology elements
31
Science
Graduate
10/01/2010

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Term
glial cells (defined)
Definition
support cells to the neurons that make up the majority of the brain tissue
Term
Name the four types of glial cells
Definition
astrocytes, oligodendrocytes, schwann cells, microglia
Term
astrocytes
Definition
glial cells responsible for supplying nutrients and for scarring damaged areas.
Term
oligodendrcytes
Definition
produce myelin in the CNS
Term
Schwann cells
Definition
produce myelin in the PNS
Term
Microglia
Definition
(Phagocytes) clean up dead tissue
Term
Name the 4 basic neuron types
Definition
bipolar, unipolar, multipolar, and pyrimidal
Term
Where are neurochemicals manufactured in the neuron?
Definition
In the soma (cell body)
Term
How are neurochemicals transported?
Definition
via axon to axon terminals
Term
What are the 2 transport methods for neurochemicals?
Definition
anterograde and retrograde
Term
anterograde
Definition
transport of a neurochemical from soma to terminal.
Term
retrograde
Definition
transport of a neurochemical from the terminal to the soma.
Term
synapse (defined)
Definition
discharge of a neurochemical from the bouton into the synaptic cleft stimulating the receptor neuron.
Term
synaptic cleft (defined)
Definition
small space between the bouton of the axon & receptor sites on the dendrites of the next bouton.
Term
name the 3 types of information passed between synapse
Definition
excitatory, inhibitory, and regulatory
Term
Name the three types of fiber tracts
Definition
commissural fiber tracts, association fiber tracts, and projection fiber tracts
Term
commissural fiber tracts
Definition
connects the hemispheres
Term
association fiber tracts
Definition
connects the cortical areas within a hemisphere
Term
projection fiber tracts
Definition
connect thalamus to cortex, cortex to bulbar region and cortex to the red nucleus.
Term
name the three projection fiber tracts
Definition
Thalamocortical, corticobulbar, corticorubral
Term
name 4 ways the glial cells control the internal environment of the CNS
Definition
shuttle nutritive molecules from blood to neurons, remove waste, maintain electrochemical surroundings of neuron, guide developing neurons to correct locations
Term
ependymal cells
Definition
simple cuboidal epithelium tightly packed that lines the vetricles and central canal of the spinal cord.
Term
tanycytes
Definition
special ependymal cells that attaches appendages to the blood vessels and acts as a transport system between blood and ventricles.
Term
3 functions of microglia
Definition
immune cells for the brain, help clear away & clean up dead & dying cells and cell debris, trigger astrocytes or additional cells of the immune system to respond to injury site.
Term
hierarchy of motor system (DAB)
Definition
The lower motor neruon level, the vestibular-reticular level, the extrapyramidal system, the upper motor neuron level, the cerebellar level, the conceptual-programming level
Term
motor speech system organization (Benarroch et al)
Definition
the final common pathway, the direct activation pathway, the indirect activation pathway, the control circuits, the conceptual-programming level
Term
what are the levels of the sensory system?
Definition
peripheral organs; afferrent neuronal fibers; spinal cord; afferrent pathways up spinal cord and brain stem; portions of thalamus; pathway from thalamus to cortex; sensory cortex in temporal, parietal and occipital lobes
Term
transduction
Definition
converting energy (electrical or chemical) into receptor current
Term
name 4 types of transducers
Definition
sound, light, chemical, thermal, and mechanical
Term
Name 7 types of senses
Definition
visceral, touch, pressure, temperature, pain, proprioception, and special senses.
Term
Name the five special senses
Definition
sight, hearing, taste, smell, and equilibrium.
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