the brain. They tell the brain what you are feeling—from the texture of a fabric to the heat of a flame. Descending Tracts (The "Motor Downstream") : These carry commands
S ensory = A scending (Afferent); M otor = D escending (Efferent). ascending and descending tracts of spinal cord ppt
Typically follow a three-neuron chain . The first-order neuron detects stimuli, the second-order neuron ascends the spinal cord, and the third-order neuron projects from the thalamus to the sensory cortex. the brain
: Picks up the signal at the sensory receptor and enters the spinal cord. 2nd Order Neuron : Carries the signal up the spinal cord to the thalamus. 3rd Order Neuron Typically follow a three-neuron chain
The spinal cord acts as the body's primary communication cable, but it isn't just a single wire. It is packed with specialized "tracts"—bundles of axons that carry specific types of information. To master this for your next presentation or exam, you simply need to know the direction of travel and the cargo being carried. 1. Ascending Tracts: The Sensory "Inbox" Ascending tracts are