<P> Descending motor pathways carry motor signals from the brain down the spinal cord and to the target muscle or organ . They typically consist of an upper motor neuron and a lower motor neuron . The lateral corticospinal tract is a descending motor pathway that begins in the cerebral cortex , decussates in the pyramids of the lower medulla ( also known as the medulla oblongata or the cervicomedullary junction , which is the most posterior division of the brain ) and proceeds down the contralateral side of the spinal cord . It is the largest part of the corticospinal tract . It extends throughout the entire length of the medulla spinalis , and on transverse section appears as an oval area in front of the posterior column and medial to the posterior spinocerebellar tract . </P>
<P> Descending motor pathways carry motor signals from the brain down the spinal cord and to the target muscle or organ . They typically consist of an upper motor neuron and a lower motor neuron . The lateral corticospinal tract is a descending motor pathway that begins in the cerebral cortex , decussates in the pyramids of the lower medulla ( also known as the medulla oblongata or the cervicomedullary junction , which is the most posterior division of the brain ) and proceeds down the contralateral side of the spinal cord . It is the largest part of the corticospinal tract . It extends throughout the entire length of the medulla spinalis , and on transverse section appears as an oval area in front of the posterior column and medial to the posterior spinocerebellar tract . </P>
where are descending tracts found in the spinal cord
where are descending tracts found in the spinal cord
lateral corticospinal tract
lateral corticospinal tract