Final answer:
The ID Tract in the question likely refers to either the dorsal column system or the spinothalamic tract, which are major ascending sensory pathways in the spinal cord, each conveying different types of sensations and decussating at different levels.
Step-by-step explanation:
The ID Tract mentioned in the question refers most likely to one of the major pathways that transmit sensory information to the brain. Many resources differentiate the dorsal column system (also known as the dorsal column-medial lemniscus pathway) and the spinothalamic tract as the two major ascending sensory pathways in the spinal cord. Both of these tracts are composed of three successive neurons and carry different types of sensory information to the brain.
The dorsal column system is primarily responsible for conveying sensations of fine touch, vibration, and proprioception. This pathway's information ascends ipsilaterally and decussates in the medulla. In contrast, the spinothalamic tract carries information regarding pain and temperature and decussates at the level it enters the spinal cord before ascending contralaterally. The segregation of these pathways in the spinal cord is important for sensory discrimination and for diagnosing potential pathway damages based on sensory deficits.