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:: Volume 23, Issue 1 (4-2014) ::
aud 2014, 23(1): 50-61 Back to browse issues page
Visuo-spatial memory enhancement by galvanic vestibular stimulation: A preliminary report
Fatemehsadat Ghaheri1, Mansoureh Adel Ghahraman 1, Farnoush Jarollahi2, Shohreh Jalaie3
1- Department of Audiology, School of Rehabilitation, Tehran University of Medical Sciences, Iran
2- Department of Audiology, Faculty of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran
3- Department of Biostatistics, School of Rehabilitation, Tehran University of Medical Sciences, Iran
Abstract:   (6254 Views)

Background and Aim: Navigation information is processed and stored in different brain areas such as hippocampus. Since multiple pathways has been reported between vestibular nuclei and hippocampus and also cognitive dysfunction specifically in spatial memory is induced by vestibular deficits, it can be assumed that vestibular system stimulation ameliorates spatial memory. The aim of study was to evaluate the effect of galvanic vestibular stimulation on normal individual’s spatial memory.

Methods: In this experimental-interventional study, sixty 18-30-years-old women were randomly allocated in intervention and control groups. Intervention group undergone subthreshold bilateral bipolar galvanic vestibular stimulation and control group received sham stimulation. Stimulation was presented for 15 minutes. Corsi Block Tapping (CBT) test scores were compared before and after subthreshold bipolar galvanic vestibular stimulation exposure or no stimulation in each group and between groups.

Results: All test parameters were the same in both groups before stimulation (p<0.050). There were significant improvement in block span, total score and learning score in intervention group after galvanic vestibular stimulation (p<0.050), no significant difference in delayed score (p=0.600). Learning score was improved (p=0.003) and delayed score was deteriorated (p=0.010) in control group. Percentages of block span and total score in intervention group were significantly different compared to the other group (p<0.050).

Conclusion: Galvanic vestibular stimulation improves short-term and long-term spatial memory. This test may inherently have learning effect that is not influenced by stimulation.

Keywords: Galvanic vestibular stimulation, vestibular system, hippocampus, visuo-spatial memory
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Type of Study: Research |
Received: 2013/01/9 | Accepted: 2013/02/6 | Published: 2014/02/2
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Volume 23, Issue 1 (4-2014) Back to browse issues page
شنوایی شناسی - دانشگاه علوم پزشکی تهران Bimonthly Audiology - Tehran University of Medical Sciences
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