Reflexes

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Receptor
Detects stimuli and converts to action potentials (transduction)
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Afferent
Neurons that carry information to the CNS
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Central
Interneurons found in the spinal cord and brainstem nuclei
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Efferent
Neurons that carry information away from the CNS and to the effectors
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Effectors
Deliver appropriate responses to the reflex, e.g. skeletal/cardiac/smooth muscle contraction or glandular release
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Monosynaptic
There is only a single neuron-neuron synapse
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Myotatic
A simple stretch reflex whose receptors are muscle fibres and Golgi tendon organs. The stretching of muscles can be enough to initiate a sensory response and an action potential - contraction of muscles prevents damage. It is monosynaptic
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Knee jerk
A reflex in which there is a second branch interacting with an interneuron. This leads to an inhibitory response which stops the contraction of one set of muscles, allowing for the contraction of the other set.
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Reverse myotatic
The reflex where the contraction of muscles applies pressure to sensory nerve endings, leading to excitation of the inhibitory neuron. Efferent neuron activity decreases and there is no contraction. This prevents overcontraction of muscle and damage
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Crossed extensor
A reflex where some interneurons are excitatory and some inhibitory, causing the contraction of one set of muscles (e.g. extensor) and the relaxation of the corresponding muscle (e.g. flexor)
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Other cards in this set

Card 2

Front

Neurons that carry information to the CNS

Back

Afferent

Card 3

Front

Interneurons found in the spinal cord and brainstem nuclei

Back

Preview of the back of card 3

Card 4

Front

Neurons that carry information away from the CNS and to the effectors

Back

Preview of the back of card 4

Card 5

Front

Deliver appropriate responses to the reflex, e.g. skeletal/cardiac/smooth muscle contraction or glandular release

Back

Preview of the back of card 5
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