Nystagmus produced by static placement of the head in different orientations is termed positional nystagmus and is known to occur In human subjects who are free of vestibular sympitoms. This study provides quantitative data for horizontal positional nystagmus occurrence in 49 normal human subjects, in whom the number of nystagmus beats, the slow-phase velocity of each beat, and distribution statistics were determined. A metric for the possible differentiation of physiologic positional nystagmus from pathologic positional nystagmus is described.
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References
1.
FernandezCAlzateRLindsayJR. Experimental observations on postural nystagmus.Ann Otol1960;69:94–114
2.
KameiTKornhuberHH. Spontaneous and head-shaking nystagmus in normals and in patients with central lesions.Can J Otolaryngol1974;3:372–80
3.
SpeigelEAScalaNP. Positional nystagmus in cerebellar lesions.J Neurophysiol1942;5:247–60
4.
NylenCO. Some cases of ocular nystagmus due to certain positions of the head.Acta Otolaryngol (Stockh)1924;6:106–37
5.
NylenCO. Positional nystagmus. A review and future prospects.J Laryngol Otol1950;64:295–318
6.
FrenzelH. Spontan- und Provokationsynstagmus als Krankheitssymptom.Berlin: Springer,1955
7.
FluurEErikssonL. Nystagmographs recording of vertical eye movements.Acta Otolaryngol (Stockh)1961;53:486–92
