The objective was to evaluate nystagmus intensity and direction (NID) during bow and lean test (BLT) in subjects suffering from idiopathic lateral semicircular canal benign paroxysmal positional vertigo (LSC-BPPV), in order to differentiate between the geotropic and the apogeotropic form and to determine the affected ear before using classic diagnostic procedures. The BLT was performed in 32 su...

In Volume 1 , this chapter ( 1 ) contained a definition and at least one relevant reference for each type of nystagmus, saccadic oscillation or saccadic intrusion. Table 1 lists the 41 different types of nystagmus along with 64 other terms found in the l iterature to describe them ; similarly, Table 2 lists the 1 6 saccadic oscilla­ tions and intrusions with 27 other terms found in the literatu...

Abstract Dizziness is a common symptom in medicine. The anamnesis and detection of nystagmus essential to distinguish vertigo's pathogenesis. diagnosis complex, expensive, not always available across the board. We present novel location- time-independent mobile application for videonystagmography (VNG) support vertigo patients medical staff. No additional hardware necessary. app uses artificial...

We investigated the nystagmus of a 12-year-old boy with suspected X-linked congenital nystagmus (CN) and exophoria to determine the underlying mechanisms and component signals in the 'dual-velocity' and other slow phases of his Asymmetric (a)Periodic Alternating Nystagmus (APAN). Fast Fourier transforms (FFT) were performed on the waveforms and residual data after subtracting a sawtooth wavefor...

THE cause of congenital nystagmus has been considered to be as obscure as the disorder is resistant to treatment. This paper contains little hint of value regarding the former but it is believed that it does contain some for the latter. Nystagmus may be divided into the following groups: (1) Visual or fixation nystagmus. (2) Oculomotor or gaze nystagmus. (3) Vestibular nystagmus. The movements ...

We wished to study how the severity and duration of early onset visual deprivation affects eye alignment and ocular stability. Thirty-three patients (aged 1 week to 12.8 years) with infantile cataracts (16 bilateral, 17 unilateral) were examined for periods up to 61 months. Twenty-three patients were considered to have cataracts, which were a major obstacle to vision (major form deprivation), 9...

PURPOSE Nystagmus eye movement data from infants and young children are often not suitable for advanced quantitative analysis. A method was developed to capture useful information from noisy data and validate the technique by showing meaningful relationships with visual functioning. METHODS Horizontal eye movements from patients (age 5 months-8 years) with idiopathic infantile nystagmus syndr...