Abnormal Head Impulse Test in a Unilateral Cerebellar Lesion.

ABSTRACT:

Background

The findings of head impulse tests (HIT) are usually normal in cerebellar lesions.

Case report

A 46-year-old male presented with progressive dizziness and imbalance of 3 weeks duration. The patient exhibited catch-up saccades during bedside horizontal HIT to either side, which was more evident during the rightward HIT. However, results of bithermal caloric tests and rotatory chair test were normal. MRI revealed a lesion in the inferior cerebellum near the flocculus.

Conclusions

This case provides additional evidence that damage to the flocculus or its connections may impair the vestibulo-ocular reflex only during high-speed stimuli, especially when the stimuli are applied to the contralesional side. By observing accompanying cerebellar signs, the abnormal H

SUBMITTER: Baek SH 

PROVIDER: S-EPMC4507384 | biostudies-literature | 2015 Jul

REPOSITORIES: biostudies-literature