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Questions posted in the
Neurology and Neurosurgery Forum have been answered by doctors from The Cleveland Clinic Foundation.
Question Title: head injury - concussionForum: Neurology Forum
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My husband suffered a level 3 concussion playing hockey, 8 days ago. While his memory is back (except for 12 hours of that day) and he is feeling better. He still experiences dizziness and fatigue, which I understand is normal given the circumstances, however his left pupil frequently dilates throughout the day (but, does respond to light and is not fixed for the whole day). We have been to our general practioner twice this week with our concerns with no answers. Please, if you can provide any information, should I be concerned? Thanks Drew _ _ Dear Drew, Transient and intermittent pupillary dilatation after a concussion without any other neurological signs or alteration of consciousness is likely due to mild injury to a portion of the 3rd cranial nerve. Part of the 3rd cranial nerve controls the parasympathetic input to the pupil which, in its absence, can cause pupillary dilation. This usually resolves with time. If the pupillary dilatation were associated with alterations in consciousness, eye deviation and weakness on the opposite side of the body, a more serious situation would be developing. If you see any of these signs you should seek help immediately. Give it some time. Good luck.
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