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Original Article
- Temporal Relationship between Nystagmus and Perception during Bithermal Alternate Caloric Test
- Sooyoung Kim, Eun-Jin Kwon, Hyunjin Jo, Seong-Hae Jeong
- Res Vestib Sci. 2021;20(4):134-140. Published online December 15, 2021
- DOI: https://doi.org/10.21790/rvs.2021.20.4.134
- 2,430 View
- 90 Download
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Abstract
PDF - Objectives
During caloric irritation, the spinning/rotating sensation is predominant. However, there is no report on the temporal relationship between caloric nystagmus and perception.
Methods
Consecutive 57 participants underwent bithermal caloric test in the dizziness clinic of Chungnam National University Hospital from February 2018 to September 2018. For vestibular perception, we asked the subject to report feelings of rotation and/or linear sensation during each warm and cold water irrigation period. Besides routine caloric parameters, the duration of nystagmus and vestibular sensation were analyzed.
Results
In most participants, the caloric nystagmus preceded the vestibular sensation (79.6% in right warm, 83.3% in left warm, 88.5% in right cool, and 84.6% in left cool stimuli). The precedence of perception was observed in 5 normal persons and 15 patients with vestibular migraine (n=4), unilateral vestibulopathy (n=3), and Menière’s disease (n=2), multiple systemic atrophy (n=2), cerebellar ataxia (n=2), vertebrobasilar insufficiency (n=1), and post-earthquake dizziness (n=1). The mean latency between nystagmus and perception was 11.7 seconds. And the duration of nystagmus was longer than that of perception in all conditions. Non-spinning sensations during the caloric test were also observed in some participants (26.8% in right warm, 30.3% in left warm, 29.1% in right cool, and 24.1% in left cool stimuli).
Conclusions
During the bithemal alternate caloric test, various vestibular perception and temporal relationship between perception and nystagmus suggest the bithermal caloric stimulation does not reflect only the signal originating from the horizontal canal pathway. A further validation study is needed.
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- 양온교대온도안진검사에서 안진과 전정지각의 시간적 관계
- Sooyoung Kim, Eun-Jin Kwon, Hyunjin Jo, Seong-Hae Jeong
- Received October 30, 2021 Accepted November 17, 2021 Published online November 17, 2021
- [Accepted]
- 455 View
- 0 Download
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Abstract
- Purpose
During caloric irritation, the spinning/rotating sensation is predominant. However, there is no report on temporal relationship between the caloric nystagmus and perception.
Method
Consecutive 57 participants underwent bithermal caloric test in dizziness clinic of Chungnam National University Hospital from Feb 2018 to Sep 2018. For vestibular perception, we asked the subject to report feelings of rotation and/or linear sensation during each warm and cold water irrigation period. Besides routine caloric parameters, the duration of nystagmus and vestibular sensation were analyzed.
Results
In most participants, the caloric nystagmus preceded the vestibular sensation (79.6 % in right warm, 83.3% in left warm, 88.5% in right cool, and 84.6% in left cool stimuli). The precedence of perception was observed in 5 normal persons and 15 patients with vestibular migraine (n=4), unilateral vestibulopathy (n=3), and Meniere’s disease (n=2), multiple systemic atrophy (n=2), cerebellar ataxia (n=2), vertebrobasilar insufficiency (n=1) and post-earthquake dizziness (n=1). The mean latency between nystagmus and perception was 11.7s. And the duration of nystagmus was longer than that of perception in all conditions. Non-spinning sensations during caloric test were also observed in some participants (26.8% in right warm, 30.3% in left warm, 29.1% in right cool, and 24.1% in left cool stimuli).
Conclusion
During bithemal alternate caloric test, various vestibular perception and temporal relationship between perception and nystagmus suggests the bithermal caloric stimulation does not reflect only the signal originating from horizontal canal pathway. Further validation study is needed.
Original Article
- The Feasibility and Utility of a Mobile-Based Eye Movement Recording Application: A Randomized Trial
- Hee Jin Chang, Sooyoung Kim, In-Sun Kwon, Han Young Yu, Seong-Hae Jeong
- Res Vestib Sci. 2020;19(4):120-126. Published online December 15, 2020
- DOI: https://doi.org/10.21790/rvs.2020.19.4.120
- 4,101 View
- 92 Download
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Abstract
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Supplementary Material - Objectives
This study was performed to assess the efficacy and feasibility of mobile application-based Frenzel tests in dizziness clinics.
Methods
We performed an investigator-initiated, blinded-outcome assessor, parallel, randomized controlled crossover trial at Chungnam National University Hospital between August 2019 and October 2019. Certified medical staffs were randomly assigned to the intervention group (i.e., a mobile application-based Frenzel glass system, n=15) or the observation group (i.e., a conventional desktop-based Frenzel glass system, n=15); the groups applied the respective systems for the preparation of eye movement recording and switched systems. The primary outcome was the elapsed time in seconds it took the participants to prepare the system for eye recording simulation. The secondary outcomes were perceived stress and satisfaction scores after completion of the operation, as measured by a questionnaire using 10-point Likert scales.
Results
The mean time of machine preparation for eye recording simulation was reduced by 50% in the mobile application group compared to the desktop group in both study periods (38.0±7.1 sec vs. 76.0±8.7 sec). We detected no carryover effect. Participants also reported lower stress while using application than while using the desktop system (2.3±1.3 vs. 4.6±2.4; p＜0.001). The application obtained a mean overall satisfaction score of 9.2 out of 10.
Conclusions
The implementation of an eye movement recording application in a dizziness examination was well adopted by users and decreased the time and stress related to machine operation.
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