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115 Possible Causes for Nystagmus, Square-Wave Jerks

  • 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.[]

  • 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).[] An approximately 155 s left-side nystagmus (slow phase velocity (SPV): 4.9 /s), an approximately 15 s pause with low amplitude square-wave jerks, and an approximately 105[]

  • Central Positional Vertigo

    An approximately 155 s left-side nystagmus (slow phase velocity (SPV): 4.9 /s), an approximately 15 s pause with low amplitude square-wave jerks, and an approximately 105[] The direction of nystagmus is important for the diagnosis of central paroxysmal positioning nystagmus (cPPV). Neuro-Ophthalmology, Vol. 21, Issue. 2, p. 97.[] (E) Square wave jerks—small saccades away from and back to the position of the target, with an intersaccadic interval of about 200 ms.[]

  • 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[] Differential Diagnosis Ataxia-telengiectasia - autosomal dominant, click HERE for a video of the nystagmus seen in this disorder.[]

  • 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?[]

  • Spinocerebellar Ataxia Type 6

    Another had abnormal square-wave jerks and a fourth had a reduced gain for pursuit tracking.[] The proband presented with periodic alternating nystagmus (PAN), and her 2 brothers had rebound nystagmus and gaze-evoked nystagmus.[] Abstract To investigate the frequency of positioning nystagmus in degenerative ataxic disorders, we examined downbeat positioning nystagmus (DPN) in 25 patients with spinocerebellar[]

  • Familial Progressive Vestibulocochlear Dysfunction

    The ocular signs of Friedreich’s ataxia include square wave jerks in 85 to 100% (1024-1026).[] The patient had a well-developed cervico-ocular reflex and optokinetic nystagmus response level (gain near unity at 20 /s and 40 /s stimulation); optokinetic after nystagmus[] […] vertical gaze limitation after extravolitional pathway activation with the vestibular ocular reflex (VOR) or the Bell phenomenon Nearly continuous square wave jerks commonly[]

  • Hereditary Nystagmus

    None of them showed square-wave jerks. Written informed consent to participate in this study was obtained from all subjects.[] Our present understanding of the genetics of hereditary nystagmus is somewhat limited.[] […] by 7 months to 1.5 years. 1 However, a later study observed square-wave jerks (a form of saccadic intrusion) at 7 weeks of age, which then developed into a smaller amplitude[]

  • Hereditary Cerebellar Degeneration

    wave jerks Deviation of the eyes up under closed lids (Bell's phenomenon) Vertical oculocephalic reflex normal Optokinetic nystagmus could not be elicited Constellation of[] […] positional down-beat nystagmus).[] Patients may also exhibit slow and slurred speech; nystagmus is also a feature commonly seen.[]

  • Opsoclonus-Myoclonus Syndrome

    Square-Wave Jerks Your browser does not support HTML5 video. Video 5. Ocular Flutter Your browser does not support HTML5 video. Video 6.[] The mildest cases of acute cerebellar ataxia represent a benign condition that is characterized by acute truncal and gait ataxia, variably with appendicular ataxia, nystagmus[] Furthermore, inexperienced individuals without any training in neurology often mistake opsoclonus or flutter for other more benign entities, such as square wave jerks.[]

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