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Virtual Reality-based Dual-task Exercise in Vestibular Hypofunction Patients

2018-05-31 21:41:11 | BioPortfolio

Summary

The aim is to assess the effects of virtual reality-based intervention on vestibular functions in in patients with chronic peripheral unilateral vestibular hypofunction.

Description

In a close interplay of sensory and motor functions, the brain constantly evaluates intrinsic and extrinsic movements, creating an inner - always subjective - representation of the stability. If there is an acute or chronic imbalance ("mismatch"), a multisensory misperception can occur. This is perceived subjectively as dizziness. Dizziness is the third most common neurological cause of an emergency with 11-13% after headache and stroke.

The central vestibular system is often involved in dizziness. The organ is part of the inner ear and is located in the petrous bone. It consist of macula organs, which are responsible for the detection of linear accelerations, and semicircular canals, which perceive the head velocity. Furthermore, the central vestibular system provides ocular muscles and the spinal cord with output, in order to control three reflexes. The vestibulo-ocular reflex (VOR) is responsible for a clear vision while the head is rotating, whereas the vestibulo-collic reflex (VCR) innervates the neck musculature in order to fix the head. The purpose of the vestibulo-spinal reflex (VSR) is the stabilization of the body by compensatory movements. In terms of restoring vestibular functioning, compensation can be classified into adaptation, substitution and habituation. Adaptation enhances the VOR, which is equivalent to restoration. Substitution is distinguished in literature between sensory and behavioral, in which the sensorial substitution transfers the importance given to proprioceptive and visual inputs and the behavioral substitution refers to avoidance strategies e.g. immobilization, increased blink reflex and prevention of head rotations. Habituation on the other hand, accustoms the affected person to a conflicting situation, in order that the response of the VOR is avoided.

So far, it is known that previous conventional vestibular rehabilitation is effective for age-related vestibular loss. By improving vestibular function, the vestibular rehabilitation therapy aims to improve balance and neuromuscular coordination, minimize falls and decrease the feeling of dizziness.

However, new advances in technology have been made which generate additional methods for an effective therapy; exercise and videogaming, in short, exergaming. Successful use of virtual reality in rehabilitation of vestibular patients has previously been implemented. Further, recent evidence has examined the effects of exergaming in healthy dwellers on vestibular function. There was a significant reduction found in the dynamic visual acuity (DVA) after an eight-session exergame training (in total 160 minutes).

To date, the effects on vestibulo-ocular reflex of exergames in patients with chronic peripheral vestibular hypofunction have not been systematically explored. Moreover, very little is known about the effects of exergaming includes exercises requiring head turns on vestibular function in this patients. Furthermore, exergaming could become a new tool to improve DVA and dizziness and increase the training intensity without requiring many therapists, which in turn reduces health costs. In addition, patients with dizziness are severely affected by their disease. They will welcome new, efficient and motivating forms of therapy.Finally, the main aim is to assess the effects of virtual reality-based intervention with dividat "senso" on vestibular functions in patients with chronic peripheral unilateral vestibular hypofunction.

Study Design

Conditions

Vestibular Diseases

Intervention

Exergame

Location

University Hospital Zurich, Directorate of Research and Education, Physiotherapy & Occupational Therapy Research
Zurich
ZH
Switzerland
8091

Status

Not yet recruiting

Source

University of Zurich

Results (where available)

View Results

Links

Published on BioPortfolio: 2018-05-31T21:41:11-0400

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Medical and Biotech [MESH] Definitions

Pathological processes of the VESTIBULAR LABYRINTH which contains part of the balancing apparatus. Patients with vestibular diseases show instability and are at risk of frequent falls.

The vestibular part of the 8th cranial nerve (VESTIBULOCOCHLEAR NERVE). The vestibular nerve fibers arise from neurons of Scarpa's ganglion and project peripherally to vestibular hair cells and centrally to the VESTIBULAR NUCLEI of the BRAIN STEM. These fibers mediate the sense of balance and head position.

Vestibular nucleus lying immediately superior to the inferior vestibular nucleus and composed of large multipolar nerve cells. Its upper end becomes continuous with the superior vestibular nucleus. (From Dorland, 28th ed)

Pathological processes of the VESTIBULOCOCHLEAR NERVE, including the branches of COCHLEAR NERVE and VESTIBULAR NERVE. Common examples are VESTIBULAR NEURITIS, cochlear neuritis, and ACOUSTIC NEUROMA. Clinical signs are varying degree of HEARING LOSS; VERTIGO; and TINNITUS.

The 8th cranial nerve. The vestibulocochlear nerve has a cochlear part (COCHLEAR NERVE) which is concerned with hearing and a vestibular part (VESTIBULAR NERVE) which mediates the sense of balance and head position. The fibers of the cochlear nerve originate from neurons of the SPIRAL GANGLION and project to the cochlear nuclei (COCHLEAR NUCLEUS). The fibers of the vestibular nerve arise from neurons of Scarpa's ganglion and project to the VESTIBULAR NUCLEI.

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