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Module 1: Las bases biológicas de la conducta

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Distinción entre la actividad de la neurona sensorial y motor

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Psychology -> Distinction between sensory and motor neuron activity

Distinction between sensory and motor neuron activity


A sensory neuron is a nerve cell that carries messages from the senses toward the central nervous system, whereas a motor neuron is a nerve cell that carries motor commands from the central nervous system to muscles and glands.

For example, if a person stepped on a piece of glass it is detected in the foot by a sensory neuron and a message is fired off to the spinal cord. The sensory neuron then synapses with a connector neuron inside the spinal cord. The connector neuron in turn activates another nerve cell, a motor neuron. The motor neuron leads back to muscle fibres that contract and cause the foot to withdraw from the piece of glass. This combined activity of the sensory and motor neurons is called a reflex arc, where brain activity is not required. It is an adaptive behaviour where the body can react quickly to protect itself from potential harm, without needing the brain.