Definition for Pyramidal tract
From Biology Forums Dictionary
The pyramidal tract is a direct pathway from the motor cortex to the spinal cord. The axons terminate in the ventral horn and are called the upper motor neurons. Some synapse directly on the motor neurons, while others synapse with interneurons. Most of the axons in the pyramidal tract cross over in the medulla. The pyramidal tract controls fine, discrete movements of the distal extremities. The extrapyradimal tract includes all pathways outside of the pyramidal tract. These tracts are comprised of indirect connections between the brain and spinal cord (the extrapyramidal tract does not directly synapse with motor neurons).
