THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The ascending tracts include the dorsal column-medial lemniscus system, the spinothalamic system, and the spinocerebellar system. These tracts carry sensory information from the periphery, such as pain, touch, and temperature to the brain.

Detailed explanation-2: -The corticospinal tract belongs to one of the most important descending tracts of the CNS. It contains fibers from the upper motor neurons to synapse on the lower motor neurons.

Detailed explanation-3: -Located in the white matter of the spinal cord, the ascending sensory tracts arise from either the the cells of the spinal ganglia or the intrinsic neurons within the grey matter that receive primary sensory input.

Detailed explanation-4: -The spinal cord contains ascending and descending tracts. The primary ascending tracts use three neurons to relay peripheral sensory information to the brain. In contrast, the descending tracts transmit motor impulses from the cerebral cortex throughout the body.