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110 Possible Causes for Nystagmus, Square-Wave Jerks

  • Abnormal Eye Movement

    Known as a saccadic intrusion, square wave jerks occur in only a small number of healthy individuals.[] These cases may be called "congenital nystagmus without gaze nystagmus."[] There are 2 main kinds of nystagmus: congenital nystagmus, and acquired nystagmus. What is the cause? Congenital nystagmus is present soon after birth.[]

  • Cerebellar Ataxia - Neuropathy - Vestibular Areflexia Syndrome

    Nystagmus, Gaze Evoked Nystagmus, Square Wave Jerks Creator Daniel R.[] Vestibular function testing showed severely reduced horizontal nystagmus in response to bithermal caloric stimulation.[] All patients showed gait and limb ataxia, positive Romberg sign, cerebellar dysarthria, gaze-evoked nystagmus, absent deep tendon reflexes, and impaired vibratory sensation[]

  • Friedreich Ataxia

    Oculomotor manifestations present early and include fixation instability (square wave jerks) and nystagmus. Visual loss may occur later.[] The clinical picture consisted of progressive spastic gait, truncal and limb ataxia, dysarthria, nystagmus, hyperreflexia with knee and ankle clonus and extensor plantar response[] Square wave jerks in Friedreich's ataxia . Am J Ophthalmol 1978; 85 : 400–406. 7. Furman JM , Perlman S , Baloh RW . Eye movements in Friedreich's ataxia .[]

  • Hereditary Nystagmus

    wave jerks, ocular flutter, opsoclonus (eyes and palate are 'dancing') wave: vertical, pendular amplitude: low frequency: low to medium localizes to: dento-rubro-olivary[] Abstract Our present understanding of the genetics of hereditary nystagmus is somewhat limited.[] None of them showed square-wave jerks. Written informed consent to participate in this study was obtained from all subjects.[]

  • Nystagmus

    Saccadic intrusions and oscillations and the clinical features, etiology, pathophysiology, and management of square-wave jerks, macrosaccadic oscillations, saccadic pulses[] The most common types of infantile nystagmus are 'congenital nystagmus' (CN) and latent/manifest latent nystagmus (LMLN).[] (E) Square wave jerks—small saccades away from and back to the position of the target, with an intersaccadic interval of about 200 ms.[]

  • Alcoholic Cerebellar Degeneration

    Identical cerebellar degeneration has been observed in non-alcoholic patients with severe malnutrition. 5 Eye Movements Square Wave Jerks Horizontal Saccadic Hypermetria Horizontal[] […] thiamine deficiency Alterations in GABA receptor dependent neurotransmission have also been proposed as a pathogenic mechanism Clinical features Truncal ataxia Unsteady gait Nystagmus[] Nystagmus (quick, small actions of the eyes.) Is there a known treatment for Alcoholic Cerebellar Degeneration?[]

  • Oculomotor Apraxia

    Additional features include square wave jerks, saccadic pursuit and gaze-evoked nystagmus, areflexia followed by severe peripheral neuropathy.[] The reading scan was disturbed by saccadic intrusions and/or nystagmus.[] wave jerks.[]

  • Infantile Periodic Alternating Nystagmus

    Saccadic intrusions and oscillations and the clinical features, etiology, pathophysiology, and management of square-wave jerks, macrosaccadic oscillations, saccadic pulses[] The female had nystagmus present on EMR only and all patients showed (a)periodicity to their nystagmus.[] A. true B. false B. false **ocular flutter has back to back saccades, BUT it does not have an intersaccadic interval Pathological square wave jerks/square wave oscillations[]

  • Spinocerebellar Ataxia Type 6

    Another had abnormal square-wave jerks and a fourth had a reduced gain for pursuit tracking.[] Abstract To investigate the frequency of positioning nystagmus in degenerative ataxic disorders, we examined downbeat positioning nystagmus (DPN) in 25 patients with spinocerebellar[] Abstract We report two siblings with spinocerebellar ataxia type 6 (SCA 6), both showing downbeat nystagmus (DBN) as a predominant clinical feature.[]

  • Cerebellar Disease

    When the jerks are only seen when looking at the optic disc with an ophthalmoscope they are referred to as micro-square wave jerks. 2.[] Abstract Three abnormalities of eye movement in man are described which are indicative of cerebellar system disorder, namely, centripetally beating nystagmus, failure to maintain[] , and rebound nystagmus.[]

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