The person whose condition is detailed above needs immediate neurological consultation.
You have not mentioned if the person had any other features of brain injury
like loss of memory, vomiting
, loss in balance while walking, visual disturbances.
It may need to be investigated throughly through CT scan/ MRI
scan of the brain.
The medulla oblongata
is very much within the head and unlikely to be damaged, but other areas of the brain need to assessed.
Hope this helps.