Final answer:
The man is showing symptoms of hemiplegia and body dissociation after a stroke.
Step-by-step explanation:
The man is most likely showing symptoms of hemiplegia, which is the paralysis or loss of sensation and movement in one side of the body, often caused by a stroke.
In this case, the man's belief that his own leg belongs to someone else is a form of body dissociation, a rare neurological condition known as somatoparaphrenia that can occur after a stroke or brain injury.
It involves a disconnect between the brain's perception and awareness of the body.
Hence, the individual is exhibiting signs of hemiplegia and body dissociation following a stroke.