Crossed Extensor Reflex
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Transcript of Crossed Extensor Reflex
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Crossed Extensor Reflex
Process Diagrams Step-by-Step
Copyright © 2007 by John Wiley & Sons, Inc.
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Withdrawal of right leg(flexor reflex)
Stepping on a tackstimulates SENSORYRECEPTOR (dendrites ofpain-sensitive neuron) inright foot
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SENSORYNEURONexcited
Withdrawal of right leg(flexor reflex)
Stepping on a tackstimulates SENSORYRECEPTOR (dendrites ofpain-sensitive neuron) inright foot
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Ascendinginterneurons
SENSORYNEURONexcited
Spinalnerve
Within INTEGRATING CENTER(spinal cord), sensory neuronactivates several interneurons
Descendinginterneurons
Withdrawal of right leg(flexor reflex)
Stepping on a tackstimulates SENSORYRECEPTOR (dendrites ofpain-sensitive neuron) inright foot
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Interneuronsfrom other side
![Page 5: Crossed Extensor Reflex](https://reader033.fdocuments.us/reader033/viewer/2022061507/5a4d1b067f8b9ab0599885f5/html5/thumbnails/5.jpg)
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Ascendinginterneurons
SENSORYNEURONexcited
Spinalnerve
Within INTEGRATING CENTER(spinal cord), sensory neuronactivates several interneurons
MOTORNEURONSexcited
Descendinginterneurons
Withdrawal of right leg(flexor reflex)
Stepping on a tackstimulates SENSORYRECEPTOR (dendrites ofpain-sensitive neuron) inright foot Extension of left leg
(crossed extensor reflex)
MOTORNEURONSexcited
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Interneuronsfrom other side
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Ascendinginterneurons EFFECTORS
(extensor muscles)contract, and extendleft leg
SENSORYNEURONexcited
Spinalnerve
Within INTEGRATING CENTER(spinal cord), sensory neuronactivates several interneurons
MOTORNEURONSexcited
Descendinginterneurons
Withdrawal of right leg(flexor reflex)
Flexor musclescontract and with-drawright leg
Stepping on a tackstimulates SENSORYRECEPTOR (dendrites ofpain-sensitive neuron) inright foot Extension of left leg
(crossed extensor reflex)
MOTORNEURONSexcited
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Interneuronsfrom other side
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