The document outlines various spinal cord tracts, including the rubrospinal, medial reticulospinal, lateral reticulospinal, olivospinal, vestibulospinal, and tectospinal tracts. It details their origins in the brain, crossing characteristics, and their entry points into the spinal cord's white columns. Each tract has distinct pathways, either crossed, uncrossed, or both, and specific regions of descent.

1. Rubrospinal
Tract
• From Red Nucleus of Mid Brain.
• Cross to opposite side in the Tegmentum
of Mid Brain constituting the Ventral
Tegmentum Decussation in Mid Brain.
• Fibres descends through Pons & Medulla.
• Enters the lateral white column of spinal
cord.
Medial
Reticulospinal
Tract
• From Reticular formation in Pons.
• Uncrossed.
• Fibres descends to Cervical segment only.
• Enters the Anterior White column of spinal
cord.
Lateral
Reticulospinal
Tract
• From Reticular formation of Brain Stem.
• Has both crossed and uncrossed fibres.
• Fibres Descends to Thoracic segment.
• Enters the Anterolateral White column of
spinal cord.
Olivospinal
Tract
• From the Inferior Olivary nucleus of
Medulla Oblongata.
• Enters the Anterolateral White
Column of spinal cord.
Vestibulospinal
Tract
• From Lateral Vestibular Nucleus of
Ponto-Medullary junction.
• Uncrossed.
• Enters the Anterior White Column of
spinal cord.
Tectospinal
Tract
• From Tectum of Superior Colliculus of Mid
Brain.
• Fibres cross to opposite side forming
Dorsal Tegmental Decussation in the Mid
Brain.
• Enters the Anterior White column of
spinal cord.