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Quiz 2 Crossed Extensor Reflex
Quiz 2 for A&P II from Lecture 10/28; Class 7
7
Science
10/28/2011

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Term
Flexor/Withdrawal Reflex
Stimulus
Sensory Receptor
Response
Definition
Stimulus - PAIN
Sensory Receptor - Nocoiceptors
Response - Flexing and withdrawing from the painful stimuli
Term
Crossed-extensor Reflex
Stimulus
Receptor
Response
Definition
Stimulus - PAIN
Receptor - Nocioceptors
Response - Extensor muscle on the opposite side of the body are stimulated (flexor muscles are inhibited.)
Term
Describe how the Crossed-extensor reflex work?
Definition
Sensory neurons synapse with an interneuron that crosses to the other side of the spinal cord, and synapse with more interneurons that go ip and down to other segments.
Term
What is the only reflex that occurs contralaterally in the body?
Definition
Crossed-extensor reflex.
The response occurs on the opposite side of the body.
Term
Ipsilateral Reflexes:
Definition
Stretch - Tendon - Flexor Withdrawl
All 7 steps of the reflex arc happen on the same side
Term
Unisegmental Reflexes:
Definition
Stretch - Tendon
The sensory neuron and motor neuron are found on the same spinal cord segment.
Term
Multisegmental Reflexes:
Definition
Flexor Withdrawal - Crossed-extensor
Interneuronas ascend and decend to additional cord segments involving multiple spinal nerves.