Premature Reversal Caloric Nystagmus in a Patient withMedulloblastoma, Originated from the 4th Ventricle
Journal of the Korean Neurological Association
; : 794-797, 2000.
Article
de Ko
| WPRIM
| ID: wpr-193151
Bibliothèque responsable:
WPRO
ABSTRACT
Some individuals may demonstrate a secondary phase nystagmus (SPN) following the caloric irrigation. It has been stated that if a SPN begins prior to 140 seconds after the onset of caloric stimulation and if the magnitude of the slow phase velocity is greater than 6 degrees/sec, then a premature reversal caloric nystagmus (PRCN) is said to exit. Thus far, there have been no reports describing PRCN in Korea. We described a typical PRCN in a patient with medulloblastoma within the 4th ventricle. The patient had a gaze-evoked horizontal and upbeating nystagmus. However, there was no indication of spontaneous nystagmus. A monothermal caloric test was administered. The initial left beating primary phase nystagmus was subsided at 60 seconds after right cold water stimulation and at 110 seconds, a right beating SPN with 14 degrees/sec of slow phase velocity was appeared and was continuous for 240 seconds. Although the precise mechanism of PRCN is unknown, vestibular nuclei damage may be related.
Mots clés
Texte intégral:
1
Indice:
WPRIM
Sujet Principal:
Nystagmus physiologique
/
Épreuves vestibulaires caloriques
/
Noyaux vestibulaires
/
Eau
/
Corée
/
Médulloblastome
Limites du sujet:
Humans
Pays comme sujet:
Asia
langue:
Ko
Texte intégral:
Journal of the Korean Neurological Association
Année:
2000
Type:
Article