The vestibular system provides an attractive model for understanding how changes in cellular and synaptic activity influence learning and memory in a quantifiable behavior, the vestibulo-ocular reflex. The vestibulo-ocular reflex produces eye movements that compensate for head motion; simple yet powerful forms of motor learning calibrate the circuit throughout life. Learning in the vestibulo-oc...

A quantitative electro-oculographic method was used to assess the impairment in smooth-pursuit and vestibulo-ocular reflex suppression eye movements in 12 epileptic patients and eight normal volunteers. Both types of eye movement were impaired by a factor of 40% in the epileptic patients, and the impairment was at least partly due to the treatment with phenytoin and phenobarbitone. There was a ...

UNLABELLED Benign Positional Paroxysmal Vertigo (BPPV) is one of the most common vestibular diseases and the active head rotation test one of the most modern methods of vestibular function assessment. AIM this study aims to verify if the active head rotation test may reveal signs of horizontal and/or vertical vestibulo-ocular reflex dysfunction in vertigo patients suspected for BPPV. STUDY ...

an 18-year-old girl fulfilled the diagnostic criteria for the proteus syndrome (ps). here we report our findings in comprehensive general physical and ocular examination and review the literature focused on clinical manifestations and differential diagnoses. the patient had ‘mild’ involvement of the ophthalmic apparatus: absent foveal reflex, cataract, and abnormal retinal vessels, which in the...

The vestibulo-ocular reflex (VOR) was measured in congenitally blind, adventitiously blind, and normally sighted adults to determine how it was affected by loss of vision. VOR gain and phase were measured in subjects rotated sinusoidally in total darkness, while concentrating on an imaginary earth-fixed target. Gain was lower in adventitiously blind subjects than in sighted subjects. The gain r...

H-reflex recovery curves studied in 57 normal volunteers could be divided into three groups: one with sinusoidal properties having one or more periods, one having primarily linear or exponential properties, and a third, indeterminate group.

Staphylococcal ocular infections of food animals have been somewhat under diagnosed probably due to the ubiquitous nature of staphylococcal organisms. This study was undertaken to determine the occurrence of staphylococcal ocular infections of food producing animals in Nsukka Southeast, Nigeria, and to determine the antibiogram of the isolated staphylococci. A total of 5,635 food producing anim...

The vestibulo-ocular reflex, because of its close relationship with the cerebellum and its marked adaptiveness, has become a model system for studying the functions of the cerebellum. It has been hypothesized that an evolutionarily old part of the cerebellum, the flocculus, forms a modifiable accessory pathway for the vestibulo-ocular reflex arc for adaptive control, and that the modification i...

PURPOSE Steady state tear turnover (TTO), defined as TTO under normal physiological conditions, is significantly lower in patients with untreated glaucoma than in healthy control subjects. To obtain more information on the effect of glaucoma on lacrimation, a method for quantification of reflex lacrimation was developed and applied to patients with glaucoma or ocular hypertension and healthy co...