Ascending And Descending Tracts Of Spinal Cord Ppt

PowerPoint Presentation Guide Title Slide

Title: Ascending & Descending Tracts of the Spinal Cord Subtitle: Sensory Pathways to the Brain & Motor Pathways from the Brain Your Name / Course / Date Image: A simple cross-section of the spinal cord showing white matter (tracts) and gray matter (horns).

Slide 1: Introduction – Why Tracts Matter

Key Points:

Spinal cord tracts = bundles of axons (white matter) carrying information up (ascending) or down (descending). Ascending tracts → sensory info from body to brain. Descending tracts → motor commands from brain to body.

Clinical relevance: Lesions in specific tracts cause predictable deficits (e.g., loss of vibration sense, paralysis).

Slide 2: Basic Organization of the Spinal Cord (Diagram) ascending and descending tracts of spinal cord ppt

Show a labeled cross-section:

Dorsal horn (sensory input) Ventral horn (motor output) White matter columns: Dorsal (posterior), Lateral, Ventral (anterior)

Highlight: Tracts are named by origin → destination (e.g., spinothalamic = spine → thalamus). Descending tracts → motor commands from brain to body

ASCENDING TRACTS (Sensory) Slide 3: Overview of Ascending Tracts

Function: Carry somatic & visceral sensory info → brain. Three-neuron pathway: 1st order (receptor → spinal cord) 2nd order (crosses over → thalamus) 3rd order (thalamus → cortex) Major tracts: