Neurootology

The vascular system and its influence under sympathetic and parasympathetic stimulations plays an essential role in neurophysiology of equilibrium.

The diagnosis of patients in modern neuro-otogical centres has to include not only history and examination, but also objetive and quantitative tests. In this study stress the importance of a short but significant Many authors had reported different usefull studies in the evaluation of the nystagmus which may be spontaneous and induce, any one of […]

Whiplash injuries induce abnormalities in head-trunk control due both direct impact on the neck and indirect involvement of the central vestibular system. It is usually difficult to document specific abnormalities due to whiplash injuries. We stated that examinations aimed to document head-trunk coordination involvement could be useful in the functional assessment of vestibular disorders in […]

The possible relationship between inner ear and vasopressin (AVP, ADH) has been hypothesized since twenty years ago About ten years ago, in anaesthetized guinea pigs, we demonstrated that changes in the inner ear pressure modify plasma AVP (pAVP) level and AVP secretion with consequent changes in urine flow rate and osmolality : our experiment was […]

The variety of suggested treatments of nystagmus probably reflect its multiple pathogenetic mechanisms. Basic studies have shown that several neurotransmitters are involved in the ocular motor control, including gamma-aminobutyrric acid (GABA), acetylcholine and glycine. Recently, Stahl et al. (1995 ) investigated the effects of gabapentine on acquired pendular nystagmus in two patients with multiple sclerosis. […]

The balance system allows to our body to have a right relation with environment, this is probably due by different structures that collaborate to maintain the correct voluntary posture during erect position and the clear vision of the ambience; with regard to its synergetic purpose the balance system can therefore be schematised on the base […]

Several data indicate that compensation and habituation processes are the main phenomenons of the plasticity of central nervous system (CNS), especially the plasticity of vestibular system. The detailed role of particular parts of CNS in adapatation after lessions has not been clear yet (2). Evertbody knows that in birds and reptiles cerebral motor cortex in […]

THE FUNCTION OF THE VESTIBULO-OCULAR REFLEX (VOR) IS TO STABILIZE VISUAL IMAGES ON THE RETINA DURING HEAD MOVEMENTS, THEREBY ENSURING MAXIMAL VISUAL ACUITY. IT IS POSSIBLE TO OBTAIN RELIABLE AND QUANTITATIVE INFORMATION ON VESTIBULAR FUNCTION USING A MOTORISED CHAIR, WITH THE SUBJECT’S HEAD AND BODY FIXED. SUCH TESTING OF THE VOR HAS ENTAILED LOW-FREQUENCY ROTATION […]

L’Impianto cocleare che ha nei sordi postverbali e nei bambini impiantati precocemente i suoi candidati ideali, deve oggi confrontarsi con un’altra categoria di pazienti, sicuramente più difficili, come gli adolescenti sordi preverbali. Per questi ultimi, la terapia riabilitativa e le performances che si possono ottenere hanno una vasta variabilità sia sotto l’aspetto quantitativo che qualitativo […]

The usefulness of conventional posturography when the changes of muscle tonus of the lower limbs affect position of the center of gravity which movement is measured is well known. The radius of the gravity center deflection such as length of the „way” and velocity of the movement can be calculated and compared during sequences with […]