Pendular Rotation Test in a Head-tilted Position to Evaluate Vertical Semicircular Canal Functions. Comparison of the Normal Adult Subjects and Elderly Subjects
| Autor: | Makoto Igarashi, Makoto Sakai, Masahiro Iida, Katsunori Ishida, Kimihisa Nomura |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Physics
genetic structures Semicircular canal Posterior Semicircular Canal Significant difference Rotation test Anatomy Maximal amplitude medicine.anatomical_structure Otorhinolaryngology Elderly persons Personal computer otorhinolaryngologic diseases medicine Vertical nystagmus sense organs Neurology (clinical) |
| Zdroj: | Equilibrium Research. 54:416-424 |
| ISSN: | 1882-577X 0385-5716 |
| DOI: | 10.3757/jser.54.416 |
| Popis: | Pendular rotation test in a head-tilted position was performed with a stimulus mode; amplitude=360 degrees, frequency=0.1 Hz, and maximal speed=114 deg/sec. The subject's head was tilted 60 degrees backward from the upright position, and then rotated 45 degrees either to the left or right. Using this test procedure, it was possible to evaluate the excitability of vertical semicircular canals, using infra-red CCD camera and a personal computer to analyze nystagmus.There were no significant differences in the maximal slow phase eye velocity (SPEV) or in the maximal amplitude of vertical nystagmus from the anterior or posterior semicircular canal in normal adult subjects. However, a significant difference in the maximal SPEV of vertical nystagmus was found between the anterior semicircular canal and posterior semicircular canal in elderly subjects over 70 years old. Excitability of the posterior semicircular canal was lower than that of the anterior semicircular canal in these elderly subjects. Moreover, excitability of the posterior semicircular canal in elderly persons was lower than that in normal non-elderly subjects. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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