Nerve tract

[1][2][3] In the peripheral nervous system, this is known as a nerve fascicle, and has associated connective tissue.

The nerve fibers in the central nervous system can be categorized into three groups on the basis of their course and connections.

The cingulum forms the white matter core of the cingulate gyrus and links from this to the entorhinal cortex.

Projection tracts connect the cerebral cortex with the corpus striatum, diencephalon, brainstem and the spinal cord.

Superior to the brainstem, such tracts form a broad, dense sheet called the internal capsule between the thalamus and basal nuclei, then radiate in a diverging, fanlike array to specific areas of the cortex.