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16 Cards in this Set
- Front
- Back
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Where do upper motor neurons begin and end |
Starts in the CNS and ends in cranial nerve or spinal cord |
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Where do you lower motor neurons begin and end |
Starts in spinal cord and ends in skeletal muscle or neuromuscular Junction |
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What is an afferent neuron |
Goes to the control center. Sensory |
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What happens in the anterior ventral Horn of the gray matter in the spinal cord |
Efferent motor neurons synapse |
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What happens in the posterior dorsal Horn of the gray matter in the spinal cord |
Afferent Sensory neurons synapse |
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What is an efferent neuron |
Goes away from the control center. Motor |
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What happens to action potentials in the afferent and efferent neurons of the muscle that is being stretched |
Both afferent and efferent neurons have increased action potentials |
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What are proprioceptors |
Receptors that sends body position and movement |
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Reciprocal innervation |
Contraction in a muscle while relaxing the opposite or opposing muscle |
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Golgi tendon organ |
Protects from muscle and tendon damage. Like lifting a load heavier than you have lifted before |
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Withdrawal reflex |
Quickly removing your hand from a hot stove |
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Stretch reflex |
Knee-jerk reflex |
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Crossed extensor reflex |
Allows you to keep from falling when you slip or step on something Sharp |
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What is the role of gamma motor neurons |
Activate the muscle spindle to maintain tension |
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What is the role of intrafusal fibers |
Run parallel to the contractile skeletal muscle fibers |
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What is the role of extrafusal fibers |
Contractile skeletal muscle fibers. Makes up most of the muscle |
