Anatomic specificity of central vestibular signs in posterior fossa lesions.

The reliability of central vestibular signs such as decruitment in signifying retrolabyrinthine lesions has been well established. This study was initiated to determine if this and other central vestibular signs, individually or collectively, indicate involvement of specific anatomic structures in the posterior fossa. Forty-six patients with morphologic lesions defined by computerized tomography (CT), pneumo-CT autopsy were studied. Oculomotor signs showed a statistically significant correlation with lesions of the archicerebellum. The other central vestibular signs did not show any correlation.