A lthough the computer-based electronystagmography (ENG) system's analytic routines offer refinements available only in research laboratories, the system is very useful also in everyday practice. The computer-based ENG system contains a stimulator for saccadic and sinusoidal eye movements and for optokinetic eye movements, both of which are connected to the registration program. The system cont...

The term electronystagmography (ENG) refers to the recording of eye movements and nystagmus during ®xation and in response to vestibular, visual, caloric, rotational, or positional stimulation. Typically, electrooculography (EOG) is the method used to record eye movements during ENG, with the exception that the classical EOG uses DC (direct current coupling) ampli®cation, whereas ENG in clinica...

Of the numerous causes of dizziness, those that represent a life-threatening condition are rare. Physicians must guard against missing these rare but serious conditions while controlling the cost of the evaluation of patients who present with dizziness. This case study involving a 41-year-old female was written to illustrate the importance of systematic case history taking and of obtaining an E...

The classic model of blood pressure regulation by Guyton et al. (Annu Rev Physiol 34:13-46, 1972a; Ann Biomed Eng 1:254-281, 1972b) set a new standard for quantitative exploration of physiological function and led to important new insights, some of which still remain the focus of debate, such as whether the kidney plays the primary role in the genesis of hypertension (Montani et al. in Exp Phys...

Normal visual acuity requires a stationary retinal image on the fovea. If fixation instabilities cause movement of the retinal image across the fovea for a few degrees, visual acuity is diminished. Nystagmus as the fixation instability, consequently, may impair vision. Period of foveation is the area in the wave form, i.e. a brief period of time when the eye is still and is pointed at the objec...

The general aim of this paper is to explore different ways of expressing static location in French and Serbian. Both languages use three main types of locative predicates : neutral verbs (e.g. FR. être ‘to be’), posture verbs (e.g. ENG. to sit, to lie, to stand) and verbs expressing fictive motion, i.e. verbs whose reference is to motion but which actually describe static situations (e.g. The r...

Falls are a major problem in the elderly population, but few communications address the influence of anesthesia on balance control. This study reports how a general balanced anesthesia (GBA) and a spinal anesthesia (SA) affect balance control in the elderly. We divided into three groups, according to electronystagmography findings and type of anesthesia, 21 men older than 65 years (mean age, 72...

UNLABELLED Balance alterations in the postoperative of cochlear implant surgeries varies from 31 to 75%. AIM to analyze vestibular function in the pre and postoperative periods of cochlear implanted individuals. MATERIALS AND METHODS the vestibular function was assessed, through electronystagmography, in 38 patients, in the pre and postoperative of cochlear implant procedures. RESULTS The...

In 1906 Robert Barany published his original research on the caloric test and his convection theory to explain the direction of nystagmus. Subsequent publications by others suggested different explanations, including the effect of temperature on the vestibular nerves, pressure changes in the ampulla related to temperature expansion, but also the possibility of otolith modulation of the response...