Pyramidal syndrome - Definition

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Definition


A pyramidal syndrome attacks the pyramidal tracts, the neural pathways controlling voluntary movement. This pathway begins in the central nervous system, then continues to the spinal cord. Here a synapse, a message passed between neurons, transmits the neural impulse to a motor neuron, which directly acts on the muscle via the neuromuscular junction where the command to contract the muscle is given. When there are lesions on a part of this system, for example in cases of brain lesions caused by stroke, such as in hemiplegia, this can lead to a pyramidal syndrome. This condition typically manifests as motor impairment, a type of contraction described as spastic or elastic hypertonia, and exaggerated tendon reflex.

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