Commande volontaire du mouvement - SVT - Terminale

The brain is composed of neurons and glial cells that ensure the proper functioning of the whole system. Exploration of the cerebral cortex allows us to locate the specialized motor areas responsible for voluntary movements. Motor nerve messages originating from the brain travel through bundles of neurons that "descend" into the spinal cord to the motor neurons. The cell body of the motor neuron receives diverse information, which it integrates into a single motor message, and each muscle fiber receives the message from a single motor neuron. Certain dysfunctions of the nervous system alter behavior and have consequences for health. Learning or the recovery of brain function after an accident rely on an essential capacity: cerebral plasticity.