Dizziness after head trauma: clinical and morphologic findings

Area of Science:

• Neurosurgery
• Otolaryngology
• Neurology

Background:

• Balance problems after head injury pose diagnostic challenges.
• Vestibular neurectomy is a surgical option for severe vestibular dysfunction.

Observation:

• Twelve patients with post-traumatic balance issues underwent vestibular neurectomy (translabyrinthine or middle fossa).
• Clinical, otoneurologic, surgical, and histopathologic data were analyzed to determine lesion sites.

Findings:

• Six patients had peripheral lesions: four with delayed endolymphatic hydrops, one with a stapedial footplate fracture/perilymphatic fistula, and one with internal auditory canal fracture causing eighth nerve atrophy.
• Six patients had central lesions; only one, with an arterial loop compressing the eighth nerve, benefited from neurectomy.
• Central lesions at the brain-stem junction or more centrally rarely responded to neurectomy.

Implications:

• Vestibular neurectomy is most effective for specific peripheral eighth nerve pathologies causing balance disorders.
• Accurate localization of the lesion (peripheral vs. central) is crucial for surgical success in post-traumatic vertigo.
• Further research is needed to understand the pathophysiology of central vestibular disorders post-head injury.