Ans: Hemiparesis is a condition that results in slight weakness such as mild loss of strength, either in any part of the body or half part of the body. Hemiplegia, on the other hand, is the condition when a part of the body or half portion of the body is paralysed. Thus, hemiplegia is a severe condition of hemiparesis. Both conditions arise when there is damage caused to the brain and the nervous system.