Ascending And Descending Tracts Of Spinal Cord Ppt !link! Access

Fasciculus Cuneatus: Carries information from the upper limbs and upper trunk (above T6).

Ascending tracts transmit information from the body's periphery—such as pain, temperature, touch, and proprioception—upward to the cerebral cortex, cerebellum, and brainstem. A. Dorsal Column-Medial Lemniscus Pathway (DCML)

This system originates directly from the cerebral cortex (primarily the motor cortex) and passes through the medullary pyramids. It is responsible for conscious, voluntary control of skeletal muscle.

Ascending tracts are sensory pathways that travel upward through the white matter of the spinal cord, carrying afferent information from peripheral receptors to various regions of the brain. Most of these pathways utilize a three-neuron chain to reach the cerebral cortex. ascending and descending tracts of spinal cord ppt

Fasciculus Gracilis: Carries information from the lower limbs and lower trunk (below T6).

Descending tracts carry motor signals from the brain down to the spinal cord to control voluntary and involuntary movements. They are categorized into pyramidal and extrapyramidal systems. A. Pyramidal (Corticospinal) Tracts

Coordinates conscious proprioception (joint position sense), discriminative fine touch, two-point discrimination, and vibration sense. Most of these pathways utilize a three-neuron chain

Controls axial/trunk muscles (decussates at the spinal level). B. Extrapyramidal Tracts

Cortical homunculus → tract descending brainstem/spinal cord.

Transmits sensations of crude touch and pressure . discriminative fine touch

Transmits pain and temperature sensations.

Below are direct links to detailed documents, presentations, and clinical papers:

Focus on the tracts? Include a diagram for sensory receptor mapping ?

Posterior Spinocerebellar Tract : Uncrossed fibers entering via the inferior cerebellar peduncle.