UNIDIRECTIONAL NYSTAGMUS
\jˌuːnɪda͡ɪɹˈɛkʃənə͡l nˈɪstaɡməs], \jˌuːnɪdaɪɹˈɛkʃənəl nˈɪstaɡməs], \j_ˌuː_n_ɪ_d_aɪ_ɹ_ˈɛ_k_ʃ_ə_n_əl n_ˈɪ_s_t_a_ɡ_m_ə_s]\
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Involuntary movements of the eye that are divided into two types, jerk and pendular. Jerk nystagmus has a slow phase in one direction followed by a corrective fast phase in the opposite direction, and is usually caused by central or peripheral vestibular dysfunction. Pendular nystagmus features oscillations that are of equal velocity in both directions and this condition is often associated with visual loss early in life. (Adams et al., Principles of Neurology, 6th ed, p272)
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Word of the day
basidiomycota
- comprises fungi bearing the spores on basidium: Gasteromycetes (puffballs); Tiliomycetes (comprising orders Ustilaginales (smuts) and Uredinales (rusts)); Hymenomycetes (mushrooms; toadstools; agarics; bracket fungi); in some classification systems considered a division of kingdom comprises fungi bearing spores on a basidium; includes Gasteromycetes (puffballs) Tiliomycetes comprising the orders Ustilaginales (smuts) and Uredinales (rusts) Hymenomycetes (mushrooms, toadstools, agarics bracket fungi).
Nearby Words
- unidentified flying object
- unidigitate
- unidimensional
- unidiomatic
- unidirectional
- Unidirectional Nystagmus
- uniembryonate
- unifacial
- unifarious
- unific
- unification