Final answer:
Phantom Limb Syndrome refers to the experience of sensations in amputated limbs. In the spinal cord hemisection scenario, the right leg would lose motor control and fine touch, while pain and temperature sensation would be lost on the contralateral side (the left side, in this case) below the level of injury due to the crossing over of sensory fibers.
Step-by-step explanation:
The Phantom Limb Syndrome phenomenon refers to amputees reporting sensations in limbs that are no longer there. The correct answer is b) Phantom Limb Syndrome. This syndrome is a neurological condition where amputees feel sensations, whether painful or otherwise, in the limb that has been amputated. The brain's representation of the missing body part might still be active, which can lead to the perception of sensations as if the limb was still present.
As for the scenario mentioned regarding a motorcycle accident victim, a hemisection of the spinal cord in the thoracic region can lead to various sensory deficits. This injury might result in loss of motor function on the side of the injury, which matches the loss of movement in the right leg. Moreover, sensory deficits could include loss of proprioception and fine touch on the same side of the body as the injury (ipsilateral) because these pathways ascend in the spinal cord on the same side. Conversely, loss of pain and temperature sensations would occur on the opposite side (contralateral) since these fibers cross over to the other side shortly after entering the spinal cord and then ascend. Therefore, the sensation of pain and temperature would be compromised on the left side of the body below the level of injury.