Final answer:
The medial lemniscal tract is responsible for conveying sensations of fine touch, vibration, and proprioception, different from the spinothalamic tract which carries pain and temperature sensations.
Step-by-step explanation:
The medial lemniscal tract is concerned with transmitting sensations of fine touch, vibration, and proprioception. This tract, also referred to as the dorsal column-medial lemniscal pathway, originates from sensory neurons in the dorsal root ganglia and ascends ipsilaterally in the spinal cord. It decussates, or crosses over to the other side, in the medulla before reaching the brain. In contrast, the spinothalamic tract is responsible for carrying sensations of pain and temperature, and it decussates at the level of entry in the spinal cord before ascending contralaterally. Thus, the correct answer to what the medial lemniscal tract is concerned about is (c) Proprioception and (d) Tactile Sensation. Testing the ability to discriminate between light touch and pain involves comparing the integrity of these two major sensory tracts.