VESTIBULAR TESTING AT HIGH FREQUENCY RANGE
Rasha Hamdi EI-Kabarity;
Abstract
The balance system consists of multiple sensory inputs from the vestibular end organs, visual system and somatosensory proprioceptive system (Baloh and Honrubia, 1990).
Vestibulo-ocular reflexes (VORs) have traditionally been viewed as a gaze stabilizing system that produces an eye movement equal in magnitude but opposite in direction to a head movement (Lioyd all([ David, 1998). Therefore, VORs are responsible for maintaining binocular foveal fixation and stabilizing binocular foveal images during head movement (Paige,
1996). In our daily life, the head undergoes rotations particularly
in the sagittal plane that have frequencies up to 5Hz during locomotion and even higher during running (Grossman et at.,
1988; Pozzo et al., 1990 and Leigh et al., 1992).
The assessment of patients with balance disorder or dizzness has changed significantly over the past several years (Cyr, 1991).
The present work was designed to study 20 patients with normal hearing sensitivity with excellent discrimination scores and documented peripheral disorder as evidenced by ENG test battery. They underwent conventional (0.01-0.64 Hz) and ultra high frequency (1-2Hz) sinusoidal harmonic acceleration (SHA) and ultra high frequency active bead rotation (AHR) (1-2Hz).
Vestibulo-ocular reflexes (VORs) have traditionally been viewed as a gaze stabilizing system that produces an eye movement equal in magnitude but opposite in direction to a head movement (Lioyd all([ David, 1998). Therefore, VORs are responsible for maintaining binocular foveal fixation and stabilizing binocular foveal images during head movement (Paige,
1996). In our daily life, the head undergoes rotations particularly
in the sagittal plane that have frequencies up to 5Hz during locomotion and even higher during running (Grossman et at.,
1988; Pozzo et al., 1990 and Leigh et al., 1992).
The assessment of patients with balance disorder or dizzness has changed significantly over the past several years (Cyr, 1991).
The present work was designed to study 20 patients with normal hearing sensitivity with excellent discrimination scores and documented peripheral disorder as evidenced by ENG test battery. They underwent conventional (0.01-0.64 Hz) and ultra high frequency (1-2Hz) sinusoidal harmonic acceleration (SHA) and ultra high frequency active bead rotation (AHR) (1-2Hz).
Other data
| Title | VESTIBULAR TESTING AT HIGH FREQUENCY RANGE | Other Titles | اختيار الاتزان فى الترددات العليا | Authors | Rasha Hamdi EI-Kabarity | Issue Date | 2000 |
Attached Files
| File | Size | Format | |
|---|---|---|---|
| B16164.pdf | 1.28 MB | Adobe PDF | View/Open |
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