Abnormal Head Impulse Test in a Unilateral Cerebellar Lesion
Journal of Clinical Neurology
;
: 279-282, 2015.
Article
in English
| WPRIM
| ID: wpr-96074
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 HIT findings caused by a cerebellar disorder can be distinguished from those produced by peripheral vestibular disorders.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Saccades
/
Reflex, Vestibulo-Ocular
/
Caloric Tests
/
Magnetic Resonance Imaging
/
Cerebellar Diseases
/
Cerebellum
/
Vertigo
/
Dizziness
/
Head Impulse Test
Limits:
Humans
/
Male
Language:
English
Journal:
Journal of Clinical Neurology
Year:
2015
Type:
Article
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