Morphometry of the pyramidal tract in the spinal cord of normal rats

A morphometric study of the pyramidal tract at the spinal cord level in the normal albino rat is reported. The area, perimeter, axonal and glial cell count, and axonal concentration were determined at the seventh cervical, second thoracic, and third lumbar spinal cord levels. The results show consistent diminishing values of the area, axonal and glial cell count, and axonal concentration with the tract descent in the spinal cord.