Electronystagmography and the diagnosis of a cerebellar tumour

Nagabhyru, Appa Rao

doi:10.1017/s0022215100087594

Cited by 1 publication

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“…In central lesions, visual fixation either induces spontaneous nystagmus or enhances the caloric nystagmus, but closure of the eyes reduces both types of nystagmus. 12 In the present study, vertigo due to peripheral causes accounted for 32 (64%) cases and central causes accounted for 6 (12%) cases. 12 (24%) of the cases presented with vertigo but they did not show any neurotological abnormality on investigations and was labelled as idiopathic vertigo (Table 5).…”

Section: Discussionsupporting

confidence: 44%

Vestibular test and electronystagmography in the diagnosis of vertigo

Zorengpuii¹,

Naveen²

2019

Int J Otorhinolaryngol Head Neck Surg

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Background: Vertigo, by definition, is a subjective sense of imbalance, and can result from a variety of disorders both peripheral and central. Although perfect function is required for precise balance and eye movement control, man is able to function adequately with only two of the three main sensory inputs. Great difficulty, however, occurs if only one system is intact, or if the control integrating mechanisms within the nervous system are deranged. Minor deficiencies of any, or all three sensory inputs may give rise to symptoms of imbalance. The disorders causing vertigo may be of peripheral or central origin, and accurate diagnosis of the underlying pathology is warranted for effective treatment.Methods: The study was carried out in the Department of Otorhinolaryngology, Regional Institute of Medical Sciences, Imphal. 50 cases presenting with symptoms of vertigo were studied irrespective of age, sex, caste, religion, socio-economic status and duration of illness. They were subjected to a thorough clinical examination and relevant investigations with main emphasis on vestibular tests and electronystagmography in every patient.Results: Vertigo of peripheral and central lesions accounted for 64% and 12% respectively. Idiopathic vertigo in which no neurotological abnormality is detected accounted for 24% of cases. Meniere’s disease (28%) comprised the single largest group amongst the peripheral vertigo. Majority of the patients (58%) presented with hearing impairment as associated symptom.Conclusions: Ninety percent of patients presented with less than one year duration of vertigo. Vertigo caused by peripheral vestibular lesion presents as acute, unprecipitated, short-lived episodes associated with nausea and vomiting, while vertigo of central vestibular origin follows a more gradual and insidious onset of continual imbalance.

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Section: Discussionsupporting

confidence: 44%