Labyrinthine concussion is the most common cause of vertigo following head injury
Symptoms generally diminish within several days but may linger for a month or more
Basilar skull fractures that traverse the inner ear usually result in severe vertigo lasting several days to a week and deafness in the involved ear
Chronic posttraumatic vertigo may result from cupulolithiasis
This occurs when traumatically detached statoconia (otoconia) settle on the ampulla of the posterior semicircular canal and cause an excessive degree of cupular deflection in response to head motion
Clinically, this presents as episodic positioning vertigo