Abnormal Head Impulse Test in a Unilateral Cerebellar Lesion
Journal of Clinical Neurology
; : 279-282, 2015.
Article
em En
| WPRIM
| ID: wpr-96074
Biblioteca responsável:
WPRO
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.Palavras-chave
Texto completo:
1
Índice:
WPRIM
Assunto principal:
Movimentos Sacádicos
/
Reflexo Vestíbulo-Ocular
/
Testes Calóricos
/
Imageamento por Ressonância Magnética
/
Doenças Cerebelares
/
Cerebelo
/
Vertigem
/
Tontura
/
Teste do Impulso da Cabeça
Limite:
Humans
/
Male
Idioma:
En
Revista:
Journal of Clinical Neurology
Ano de publicação:
2015
Tipo de documento:
Article