Biomaterial Database

Computer analysis of optokinetic nystagmus in patients with spontaneous nystagmus of peripheral vestibular origin. 1978

T Brandt, and J H Allum, and J Dichgans

The bias of slow phase velocity (SPV) of optokinetic nystagmus (OKN) caused by an acute labyrinthine lesion was examined in 8 patients using differnet optokinetic stimulus velocities. In all patients a directional preponderance of OKN-SPV was found corresponding to spontaneous nystagmus. This was due to enhancement of nystagmus SPV to the side of the lesion and depression of SPV in the opposite horizontal direction. The preponderance of OKN on the average increased with the intensity of spontaneous nystagmus and decreased along with recovery. These vestibularly induced differences in OKN-SPV range up to 70%. A differentiation is discussed between OKN preponderances caused by labyrinthine lesions and brain stem lesions.

UI	MeSH Term	Description	Entries
D007759	Labyrinth Diseases	Pathological processes of the inner ear (LABYRINTH) which contains the essential apparatus of hearing (COCHLEA) and balance (SEMICIRCULAR CANALS).	Inner Ear Disease,Ear Disease, Inner,Ear Diseases, Inner,Inner Ear Diseases,Labyrinth Disease
D008297	Male		Males
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D009759	Nystagmus, Pathologic	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)	Convergence Nystagmus,Horizontal Nystagmus,Jerk Nystagmus,Pendular Nystagmus,Periodic Alternating Nystagmus,Rotary Nystagmus,See-Saw Nystagmus,Vertical Nystagmus,Conjugate Nystagmus,Dissociated Nystagmus,Fatigable Positional Nystagmus,Multidirectional Nystagmus,Non-Fatigable Positional Nystagmus,Permanent Nystagmus,Rebound Nystagmus,Retraction Nystagmus,Rotational Nystagmus,Spontaneous Ocular Nystagmus,Symptomatic Nystagmus,Temporary Nystagmus,Unidirectional Nystagmus,Non Fatigable Positional Nystagmus,Nystagmus, Conjugate,Nystagmus, Convergence,Nystagmus, Dissociated,Nystagmus, Fatigable Positional,Nystagmus, Horizontal,Nystagmus, Jerk,Nystagmus, Multidirectional,Nystagmus, Non-Fatigable Positional,Nystagmus, Pendular,Nystagmus, Periodic Alternating,Nystagmus, Permanent,Nystagmus, Rebound,Nystagmus, Retraction,Nystagmus, Rotary,Nystagmus, Rotational,Nystagmus, See-Saw,Nystagmus, Spontaneous Ocular,Nystagmus, Symptomatic,Nystagmus, Temporary,Nystagmus, Unidirectional,Nystagmus, Vertical,Ocular Nystagmus, Spontaneous,Pathologic Nystagmus,Positional Nystagmus, Non-Fatigable,See Saw Nystagmus
D003201	Computers	Programmable electronic devices designed to accept data, perform prescribed mathematical and logical operations at high speed, and display the results of these operations.	Calculators, Programmable,Computer Hardware,Computers, Digital,Hardware, Computer,Calculator, Programmable,Computer,Computer, Digital,Digital Computer,Digital Computers,Programmable Calculator,Programmable Calculators
D003937	Diagnosis, Differential	Determination of which one of two or more diseases or conditions a patient is suffering from by systematically comparing and contrasting results of diagnostic measures.	Diagnoses, Differential,Differential Diagnoses,Differential Diagnosis
D004584	Electronystagmography	Recording of nystagmus based on changes in the electrical field surrounding the eye produced by the difference in potential between the cornea and the retina.	Electronystagmographies
D005133	Eye Movements	Voluntary or reflex-controlled movements of the eye.	Eye Movement,Movement, Eye,Movements, Eye
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man