2 Neural Transmission

2 Neural Transmission - OT441:Foundationsof...

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LECTURE 1: MINI REVIEW OT 441: Foundations of  Occupation: Neuroscience
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Review Questions The gray matter toward the front part of the spinal  cord can be referred to as: a. The dorsal ganglion c. The ventral column b. The anterior horn d. The superior peduncle The principal of topographic organization refers to the  notion that structures are divided into distinct areas  having a specific relation or a specific position relative  to one another.   True False
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Review Questions C. B. D. A. E.
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Review Questions A
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LECTURE 2: NEURONS AND  TRANSMISSION OT 441: Foundations of  Occupation: Neuroscience
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Outline 1. Neurons 2. Glial cells 3. Stem cells 4. How neurons communicate - Postsynaptic potentials - Action potentials - Synaptic transmission 5. Clinical conditions
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The Neuron Function: primary functional  and anatomic unit of the NS Receives and integrates info Analysis of info Transmission of info Initiation of a response or  output
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The Neuron 4 Components: Soma Dendrites Axon Presynaptic terminals Presynaptic terminals
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The Neuron Soma Receives and integrates info Metabolic center Dendrite Receives information, main input  site for cell Increases receptive surface of neuron
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The Neuron Axon Sends information to other neurons  Main output  unit of the cell Arises from the axon hillock Ends in presynaptic terminals/   terminal  bouton Group together to form nerves & tracts
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The Axon Initial segment Myelin sheath Fatty insulation surrounding an axon Increases speed of action potential Node of Ranvier Small unmyelinated gaps on myelinated  axons Saltatory conduction: as the AP “jumps”  from node to node Presynaptic terminal/terminal  node/presynaptic bouton Releases NTs into the cleft
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Let’s label…
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Structure of the Synapse Synaptic  knob/presynaptic  terminal/terminal bouton Vesicles Presynaptic cell Synaptic cleft Postsynaptic cell
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The Synapse Types:  Axodendritic: Axosomatic: Axoaxonal: The point where interchange of  information happens between 2 neurons
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Classifications 1. By number of processes that originate  from the cell body 1. Functional classification 1. By neurotransmitter used
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Classification by Number of Processes Unipolar (invertebrates) Pseudounipolar:  Both processes function as an axon Bipolar:  1 axon, 1 dendrite Multipolar:  1 axon, many dendrites
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Functional Classification Sensory/Afferent: convey  information into the CNS Motor/Efferent: transmit  information from CNS to  peripheral structures   (muscles  and glands) Interneuronal: Send  information between sensory  and motor neurons
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Purkinje Cells
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This note was uploaded on 09/02/2010 for the course OT 441 taught by Professor Stein during the Summer '10 term at USC.

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2 Neural Transmission - OT441:Foundationsof...

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