NEET PG DENTAL EXAM

Detailed explanation-1: -The corticospinal tract constitutes a large part of the internal capsule, carrying motor information from the primary motor cortex to the lower motor neurons in the spinal cord.

Detailed explanation-2: -The internal capsule consists of projection fibres passing through the corpus striatum. It forms a knee-bend (genu) around the apex of the lentiform nucleus and is V-shaped on axial (horizontal) sections.

Detailed explanation-3: -The internal capsule, a white matter structure, is a unique location where a large number of motor and sensory fibers travel to and from the cortex.

Detailed explanation-4: -Descending tracts are the pathways by which motor signals are sent from the brain to the spinal cord. They are also called motor tracts, due to their involvement in movement coordination. These tracts can be classified by their structural arrangement, into lateral and medial tracts.