The pyramidal tracts include both the corticobulbar tract and the corticospinal tract. These are aggregations of efferent nerve fibers from the upper motor neurons that travel from the cerebral cortex and … 展开

The nerves within the corticospinal tract are involved in movement of muscles of the body. Because of the crossing-over of fibres, muscles are supplied by the side of the brain opposite to that of the muscle. … 展开

1. Damage to the fibres of the corticospinal tracts, anywhere along their course from the cerebral cortex to the lower end of the spinal cord, can cause an upper motor neuron syndrome.
2. A few days after the injury to the upper motor neurons, a … 展开

• Dissection of brain-stem. Lateral view.
• Superficial dissection of brain-stem. Ventral view.
• The motor tract.
• Diagram of the principal fasciculi of the spinal cord, from 展开

In National Lampoon's European Vacation, the Griswold family wins a vacation on a game show called Pig in a Poke when their opponents fail to correctly answer a question about the pyramidal tracts, despite Clark Griswold (played by Chevy Chase) mistakenly … 展开

• McGill
• Stained brain slice images which include the "Corticospinal tract" at the BrainMaps project 展开