Conversation: The conversation between human and AI assistant.
[|Human|] My son has a problem. He gets ill because he has a delayed recognition of movement by the brain. He describes his illness as moving his head to thr left or right and the brain senses this movement in a delayed way. This is causing him to a bit like motion sikness but it is not motion sickness but a very real delayed recognition of movement.
[|AI|]  Hi, There are several things that come to mind that could fit his description of symptoms. One is positional vertigo which is a sense of unusual bodily movement that can come with symptoms of nausea (perhaps even vomiting if persistent). The other is something referred to perceptual POSTURAL POSITIONAL DIZZINESS (PPPD) and in this disorder a person is always feeling a little off kilter. Either a ENT specialist interested in vertiginous disorders or neurobiologist would be best to evaluate his symptoms for the best diagnosis. Hope I have answered your question. Let me know if I can assist you further.