Neurophysiology of Nerve Impulses The Nervous...
Transcript of Neurophysiology of Nerve Impulses The Nervous...
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Neurophysiology ofNerve Impulses
TheNervousSystem
Function of the Nervous System
sensoryreceptor
sensory input
integration
motor inputeffector
Anatomical Divisionsof the Nervous System
Central Nervous System (CNS)brainspinal cord
Peripheral Nervous System (PNS)cranial nervesspinal nerves
AnatomicalDivisions ofthe Nervous
System
CNS PNSbrain
spinalcord
cranialnerves
spinalnerves
Typical Motor Neuron
cell body
dendrite axon
axoncollateral
musclefibers
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Myelin Sheath
axon
nodes of RanvierSchwann cells
Neuron Interaction&
Integration
sensoryreceptors
sensoryneuron
interneuronmotorneuron effector
Anatomy of a Nerveaxon
myelin sheathendoneurium
fascicleperineurium
blood vesselsepineurium
Resting Potentialof an Axon
Resting Potentialof an Axon
Resting Potential of an Axon
-70 mV
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Depolarizing the Membrane
Depolarizationof the AxonMembrane
ActionPotential
Propagationof the Action
Potential
Stimuli Capable of Elicitingan Action Potential
ElectricalChemical
MechanicalThermal
Neuron-To-NeuronTransmissionsynapses
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Synapse
postsynapticneuron
presynapticneuron
synaptic vesiclescontaining
neurotransmitters
synapse
Synapses
Synapses Neurophysiology Apparatus
Eliciting a Nerve Impulse Inhibiting a Nerve Impulse
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Nerve Conduction Velocity