Final answer:
Brown-Séquard Syndrome occurs due to a hemisection of the spinal cord, typically from forceful trauma, resulting in hemiplegia and complex sensory outcomes.
Step-by-step explanation:
Brown-Séquard Syndrome results from a hemisection of the spinal cord. This condition can occur when there is forceful trauma to the trunk that may cause bones to fracture and lead to a partial tearing or crushing of the spinal cord. Unlike a complete transection, which would result in paraplegia, a hemisection leaves one side of the spinal cord tracts intact, leading to hemiplegia on the side of the trauma with paralysis of one leg, while the other leg may retain movement. The sensory results of a hemisection are more complicated and can vary depending on the specific nerves affected by the injury.