Perilymph fistula . Usually symptoms of imbalance and dizziness provoked by straining or blowing the nose. The frequency to which this syndrome occurs is controversial, but general opinion holds that it is rare. Vertigo due to brain injury, typically the part of the temporal lobe that processes vestibular signals. Loss of consciousness usually occurs at the time of injury.
Treatment is with anticonvulsants.
Historically, significant DAI is not felt to occur in awake humans who do not report loss of consciousness. This is basically a combination of headache, dizziness, and mental disturbance which follows a head injury, without an identifiable etiology. If an etiology can be determined for symptoms, a more specific diagnosis should be used. While dizziness and nausea symptoms usually resolve over 6 weeks, cognitive symptoms and headaches may be persist longer. Occasionally symptoms are permanent.