Effects of stimulus complexity on bisensory audiovisual integration

Qi Li, Naoya Nakamura, Jinglong Wu, Yasuyuki Ohta, Koji Abe

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

With the rapid increase in the number of elderly people, the number of people with dementia is also increasing. The most common form of dementia is Alzheimer's disease, which accounts for 50-70% of all dementia cases. Until the present time, however, there was no effective early detection method for Alzheimer's disease. A recent study showed that brain glucose metabolism in healthy volunteers was different than glucose metabolism in Alzheimer's patients during the response to passive audiovisual stimulation. This result suggested that the mechanism of audiovisual integration in patients with Alzheimer's disease was influenced by the disease. In the present study, the authors investigated the effects of modality-specific selective attention on audiovisual integration using simple visual and auditory stimuli in healthy human subjects. Three different attentional instructions were accessed: (1) visual selective attention, in which subjects were instructed to focus their attention on visual stimuli; (2) auditory selective attention, in which subjects were instructed to focus their attention on auditory stimuli; and (3) audiovisual divided attention, in which subjects were instructed to focus their attention on both visual and auditory stimuli. The results showed that significant bimodal enhancement was present only in the divided attention condition, which is similar to the results of a previous study using complex semantic stimuli. Therefore, the authors conclude that stimulus complexity does not influence the modality-specific selective attention effects of audiovisual integration. A future study will examine the mechanism of audiovisual integration in patients with Alzheimer's disease using the same experimental design (using simple stimuli), which will hopefully help find a new method for the early detection of Alzheimer's disease.

Original languageEnglish
Title of host publicationEarly Detection and Rehabilitation Technologies for Dementia: Neuroscience and Biomedical Applications
PublisherIGI Global
Pages80-88
Number of pages9
ISBN (Print)9781609605599
DOIs
Publication statusPublished - 2011

Fingerprint

Alzheimer Disease
Dementia
Healthy Volunteers
Glucose
Semantics
Early Diagnosis
Research Design
Brain

ASJC Scopus subject areas

  • Health Professions(all)

Cite this

Li, Q., Nakamura, N., Wu, J., Ohta, Y., & Abe, K. (2011). Effects of stimulus complexity on bisensory audiovisual integration. In Early Detection and Rehabilitation Technologies for Dementia: Neuroscience and Biomedical Applications (pp. 80-88). IGI Global. https://doi.org/10.4018/978-1-60960-559-9.ch010

Effects of stimulus complexity on bisensory audiovisual integration. / Li, Qi; Nakamura, Naoya; Wu, Jinglong; Ohta, Yasuyuki; Abe, Koji.

Early Detection and Rehabilitation Technologies for Dementia: Neuroscience and Biomedical Applications. IGI Global, 2011. p. 80-88.

Research output: Chapter in Book/Report/Conference proceedingChapter

Li, Q, Nakamura, N, Wu, J, Ohta, Y & Abe, K 2011, Effects of stimulus complexity on bisensory audiovisual integration. in Early Detection and Rehabilitation Technologies for Dementia: Neuroscience and Biomedical Applications. IGI Global, pp. 80-88. https://doi.org/10.4018/978-1-60960-559-9.ch010
Li Q, Nakamura N, Wu J, Ohta Y, Abe K. Effects of stimulus complexity on bisensory audiovisual integration. In Early Detection and Rehabilitation Technologies for Dementia: Neuroscience and Biomedical Applications. IGI Global. 2011. p. 80-88 https://doi.org/10.4018/978-1-60960-559-9.ch010
Li, Qi ; Nakamura, Naoya ; Wu, Jinglong ; Ohta, Yasuyuki ; Abe, Koji. / Effects of stimulus complexity on bisensory audiovisual integration. Early Detection and Rehabilitation Technologies for Dementia: Neuroscience and Biomedical Applications. IGI Global, 2011. pp. 80-88
@inbook{2fb4c5c362b14542b0787d07a39827fb,
title = "Effects of stimulus complexity on bisensory audiovisual integration",
abstract = "With the rapid increase in the number of elderly people, the number of people with dementia is also increasing. The most common form of dementia is Alzheimer's disease, which accounts for 50-70{\%} of all dementia cases. Until the present time, however, there was no effective early detection method for Alzheimer's disease. A recent study showed that brain glucose metabolism in healthy volunteers was different than glucose metabolism in Alzheimer's patients during the response to passive audiovisual stimulation. This result suggested that the mechanism of audiovisual integration in patients with Alzheimer's disease was influenced by the disease. In the present study, the authors investigated the effects of modality-specific selective attention on audiovisual integration using simple visual and auditory stimuli in healthy human subjects. Three different attentional instructions were accessed: (1) visual selective attention, in which subjects were instructed to focus their attention on visual stimuli; (2) auditory selective attention, in which subjects were instructed to focus their attention on auditory stimuli; and (3) audiovisual divided attention, in which subjects were instructed to focus their attention on both visual and auditory stimuli. The results showed that significant bimodal enhancement was present only in the divided attention condition, which is similar to the results of a previous study using complex semantic stimuli. Therefore, the authors conclude that stimulus complexity does not influence the modality-specific selective attention effects of audiovisual integration. A future study will examine the mechanism of audiovisual integration in patients with Alzheimer's disease using the same experimental design (using simple stimuli), which will hopefully help find a new method for the early detection of Alzheimer's disease.",
author = "Qi Li and Naoya Nakamura and Jinglong Wu and Yasuyuki Ohta and Koji Abe",
year = "2011",
doi = "10.4018/978-1-60960-559-9.ch010",
language = "English",
isbn = "9781609605599",
pages = "80--88",
booktitle = "Early Detection and Rehabilitation Technologies for Dementia: Neuroscience and Biomedical Applications",
publisher = "IGI Global",

}

TY - CHAP

T1 - Effects of stimulus complexity on bisensory audiovisual integration

AU - Li, Qi

AU - Nakamura, Naoya

AU - Wu, Jinglong

AU - Ohta, Yasuyuki

AU - Abe, Koji

PY - 2011

Y1 - 2011

N2 - With the rapid increase in the number of elderly people, the number of people with dementia is also increasing. The most common form of dementia is Alzheimer's disease, which accounts for 50-70% of all dementia cases. Until the present time, however, there was no effective early detection method for Alzheimer's disease. A recent study showed that brain glucose metabolism in healthy volunteers was different than glucose metabolism in Alzheimer's patients during the response to passive audiovisual stimulation. This result suggested that the mechanism of audiovisual integration in patients with Alzheimer's disease was influenced by the disease. In the present study, the authors investigated the effects of modality-specific selective attention on audiovisual integration using simple visual and auditory stimuli in healthy human subjects. Three different attentional instructions were accessed: (1) visual selective attention, in which subjects were instructed to focus their attention on visual stimuli; (2) auditory selective attention, in which subjects were instructed to focus their attention on auditory stimuli; and (3) audiovisual divided attention, in which subjects were instructed to focus their attention on both visual and auditory stimuli. The results showed that significant bimodal enhancement was present only in the divided attention condition, which is similar to the results of a previous study using complex semantic stimuli. Therefore, the authors conclude that stimulus complexity does not influence the modality-specific selective attention effects of audiovisual integration. A future study will examine the mechanism of audiovisual integration in patients with Alzheimer's disease using the same experimental design (using simple stimuli), which will hopefully help find a new method for the early detection of Alzheimer's disease.

AB - With the rapid increase in the number of elderly people, the number of people with dementia is also increasing. The most common form of dementia is Alzheimer's disease, which accounts for 50-70% of all dementia cases. Until the present time, however, there was no effective early detection method for Alzheimer's disease. A recent study showed that brain glucose metabolism in healthy volunteers was different than glucose metabolism in Alzheimer's patients during the response to passive audiovisual stimulation. This result suggested that the mechanism of audiovisual integration in patients with Alzheimer's disease was influenced by the disease. In the present study, the authors investigated the effects of modality-specific selective attention on audiovisual integration using simple visual and auditory stimuli in healthy human subjects. Three different attentional instructions were accessed: (1) visual selective attention, in which subjects were instructed to focus their attention on visual stimuli; (2) auditory selective attention, in which subjects were instructed to focus their attention on auditory stimuli; and (3) audiovisual divided attention, in which subjects were instructed to focus their attention on both visual and auditory stimuli. The results showed that significant bimodal enhancement was present only in the divided attention condition, which is similar to the results of a previous study using complex semantic stimuli. Therefore, the authors conclude that stimulus complexity does not influence the modality-specific selective attention effects of audiovisual integration. A future study will examine the mechanism of audiovisual integration in patients with Alzheimer's disease using the same experimental design (using simple stimuli), which will hopefully help find a new method for the early detection of Alzheimer's disease.

UR - http://www.scopus.com/inward/record.url?scp=84898142771&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84898142771&partnerID=8YFLogxK

U2 - 10.4018/978-1-60960-559-9.ch010

DO - 10.4018/978-1-60960-559-9.ch010

M3 - Chapter

AN - SCOPUS:84898142771

SN - 9781609605599

SP - 80

EP - 88

BT - Early Detection and Rehabilitation Technologies for Dementia: Neuroscience and Biomedical Applications

PB - IGI Global

ER -