Limits...
Using eye movement analysis to study auditory effects on visual memory recall.

Marandi RZ, Sabzpoushan SH - Basic Clin Neurosci (2014)

Bottom Line: The method was validated with eight different participants.Recognition rate in "with sound" stage was significantly reduced as compared with "without sound" stage.The result demonstrated that the familiarity of visual-auditory stimuli can be detected from EOG signals and the auditory input potentially improves the visual recall process.

View Article: PubMed Central - PubMed

Affiliation: Department of Biomedical Engineering, Iran University of Science and Technology, Narmak, Tehran, Iran.

ABSTRACT
Recent studies in affective computing are focused on sensing human cognitive context using biosignals. In this study, electrooculography (EOG) was utilized to investigate memory recall accessibility via eye movement patterns. 12 subjects were participated in our experiment wherein pictures from four categories were presented. Each category contained nine pictures of which three were presented twice and the rest were presented once only. Each picture presentation took five seconds with an adjoining three seconds interval. Similarly, this task was performed with new pictures together with related sounds. The task was free viewing and participants were not informed about the task's purpose. Using pattern recognition techniques, participants' EOG signals in response to repeated and non-repeated pictures were classified for with and without sound stages. The method was validated with eight different participants. Recognition rate in "with sound" stage was significantly reduced as compared with "without sound" stage. The result demonstrated that the familiarity of visual-auditory stimuli can be detected from EOG signals and the auditory input potentially improves the visual recall process.

No MeSH data available.


Configuration of electrodes on a subject's face for EOG signal acquisition.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4202595&req=5

Figure 0003: Configuration of electrodes on a subject's face for EOG signal acquisition.

Mentions: Neurophysiologic signals were recorded and filtered using a Simulink application. For the present study, a g.USBAmp amplifier (g.tec Medical Engineering GmbH, Austria) was used. This device represents a multimodal amplifier for electrophysiological signals such as EEG, EOG, EMG and ECG. EOG signals were captured by 5 electrodes placed as in Fig. 3 and were recorded using a bipolar configuration. For the horizontal EOG (HEOG) the electrodes were placed at the outer canthus of each eye and for the vertical EOG (VEOG) infra-orbital and supra-orbital electrodes were placed in line with the pupil of one eye. Ground electrode was placed on the earlobe. Sampling rate was adjusted to 256 Hz. High-purity gold (Au) electrodes with resistance of lower than 5 kΩ were used in this research.


Using eye movement analysis to study auditory effects on visual memory recall.

Marandi RZ, Sabzpoushan SH - Basic Clin Neurosci (2014)

Configuration of electrodes on a subject's face for EOG signal acquisition.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4202595&req=5

Figure 0003: Configuration of electrodes on a subject's face for EOG signal acquisition.
Mentions: Neurophysiologic signals were recorded and filtered using a Simulink application. For the present study, a g.USBAmp amplifier (g.tec Medical Engineering GmbH, Austria) was used. This device represents a multimodal amplifier for electrophysiological signals such as EEG, EOG, EMG and ECG. EOG signals were captured by 5 electrodes placed as in Fig. 3 and were recorded using a bipolar configuration. For the horizontal EOG (HEOG) the electrodes were placed at the outer canthus of each eye and for the vertical EOG (VEOG) infra-orbital and supra-orbital electrodes were placed in line with the pupil of one eye. Ground electrode was placed on the earlobe. Sampling rate was adjusted to 256 Hz. High-purity gold (Au) electrodes with resistance of lower than 5 kΩ were used in this research.

Bottom Line: The method was validated with eight different participants.Recognition rate in "with sound" stage was significantly reduced as compared with "without sound" stage.The result demonstrated that the familiarity of visual-auditory stimuli can be detected from EOG signals and the auditory input potentially improves the visual recall process.

View Article: PubMed Central - PubMed

Affiliation: Department of Biomedical Engineering, Iran University of Science and Technology, Narmak, Tehran, Iran.

ABSTRACT
Recent studies in affective computing are focused on sensing human cognitive context using biosignals. In this study, electrooculography (EOG) was utilized to investigate memory recall accessibility via eye movement patterns. 12 subjects were participated in our experiment wherein pictures from four categories were presented. Each category contained nine pictures of which three were presented twice and the rest were presented once only. Each picture presentation took five seconds with an adjoining three seconds interval. Similarly, this task was performed with new pictures together with related sounds. The task was free viewing and participants were not informed about the task's purpose. Using pattern recognition techniques, participants' EOG signals in response to repeated and non-repeated pictures were classified for with and without sound stages. The method was validated with eight different participants. Recognition rate in "with sound" stage was significantly reduced as compared with "without sound" stage. The result demonstrated that the familiarity of visual-auditory stimuli can be detected from EOG signals and the auditory input potentially improves the visual recall process.

No MeSH data available.