The man who lives in a badly dubbed world: 67-year-old HEARS people speak before he SEES their lips move
- The man, known only as PH, started suffering the unusual sight and sound discrepancy shortly after undergoing surgery
- Scans show he has two lesions in areas of the brain which potentially play a role in hearing, timing and movement
A 67-year-old man has a rare brain defect which causes him to hear people speak before he sees their lips move.
The end result is that all of his conversations resemble a badly dubbed film where the sound and actions are out of sync.
The man, known only as PH, is the first confirmed case of the disorder where his brain processes sight significantly slower than sound.
PH first started suffering the unusual symptoms after undergoing surgery.
‘I said to my daughter “hey, you’ve got two TVs that need sorting!'”, he told New Scientist.
But PH then realised that he was hearing his own voice before feeling his jaw move.
Doctors conducted scans of his brain which showed two lesions in areas that potentially play a role in hearing, timing and movement.
The signals are then processed at different rates in the brain but still appear as though they are happening simultaneously.
PH’s brain is believed to processes visual input much slower than it processes sound – causing the large time discrepancy.
Elliot Freeman and colleagues at City University London performed several temporal order judgment tests using video clips to confirm the condition.
They found that they had to play the sound 200 milliseconds later for PH to view it as in sync with the visual action
Mr Freeman is now looking for a way to slow down PH’s hearing so it matches what he is seeing.
Read more: http://www.dailymail.co.uk/health/article-2356194/The-man-lives-badly-dubbed-world-67-year-old-hears-people-speak-brain-registers-lips-moved.html#ixzz2Y7h1AUiZ
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