Final answer:
The correct term for slight paralysis of one side of the body is hemiparesis, which may result from conditions affecting the nervous system.
Step-by-step explanation:
The correct spelling for slight paralysis of the left or right side of the body is hemiparesis. Hemiparesis is characterized by the weakness of one side of the body and is often a result of injuries or disorders affecting the nervous system such as a stroke or spinal cord trauma. When a person experiences severe damage to the spinal cord that affects only one side, it's known as a hemisection, which can lead to hemiplegia, a more severe form of paralysis on the impact side. In Michael's case, his stiff neck and hemiparesis could be indicative of an infection affecting the nervous system, which necessitates additional medical tests.