All of the following descriptions refer to specific ascending pathways except one: (a) they include the fasciculus gracilis and fasciculus cuneatus, which terminate in the thalamus; (b) they include a chain of three neurons; (c) their connections are diffuse and polymodal; (d) they are concerned with precise transmission of one or a few related sensory modalities.
POSTERIOR COLUMN-MEDIAL LEMNISCUS SENSORY (ASCENDING) PATHWAY TO THE CEREBRAL CORTEX
Sensory ascending pathways involving the fasciculus gracilis and fasciculus cuneatus do not terminate in the thalamus.
Here is a brief description of this pathway.
It is called the posterior column-medial lemniscus ...
A question concerning specific ascending pathways is answered and explained in detail.