Dr. Walid Soussou, President of Wearable Sensing and CEO of QUASAR, leads both companies’ efforts at developing applications of dry-electrode EEG technology. Dr. Soussou leverages his PhD in Neuroscience from the University of Southern California (USC), expertise in Brain-Computer-Interfaces, and experience in sleep research, for developing commercial applications of wearable EEG/EOG/EMG/ECG sensors in commercial domains including neuroergonomics, augmented cognition, Brain-Computer-Interfaces (BCI), neuromarketing, peak-performance training, neuroeducation, etc. Address: San Diego, California, United States
... Walid V. Soussou and Theodore W. Berger 121 Neurofeedback for Control of Emotions and Antisoc... more ... Walid V. Soussou and Theodore W. Berger 121 Neurofeedback for Control of Emotions and Antisocial Personality Disorders EEG handheld devices work well to ... REFERENCES Abelson, JL, G C. Curtis, O. Sagher, R C. Albucher, M. Harrigan, SF Taylor, B. Martis, and B. Giordani ...
... WALID SOUSSOU, GHASSAN GHOLMIEH, MARTIN HAN, ASHISH AHUJA, DONG SONG, MIN-CHI HSIAO, ZHUO WAN... more ... WALID SOUSSOU, GHASSAN GHOLMIEH, MARTIN HAN, ASHISH AHUJA, DONG SONG, MIN-CHI HSIAO, ZHUO WANG, ARMAND R. TANGUAY JR., AND ... how useful and easy a color spatial map can be for visually presenting a long-term potentiation (LTP) experiment run ...
International Conference on Human-Computer Interaction, 2018
While operators performing tasks with high workload can increase task performance in response to ... more While operators performing tasks with high workload can increase task performance in response to limited increases in cognitive stress, chronic or rapidly accelerating stress can exceed the operator’s ability to compensate, generating acute cognitive strain (ACS). ACS represents a state wherein performance, situation awareness and cooperativity deteriorate markedly, leading to critical errors, mishaps or casualties. Nearly two decades of augmented cognition (AugCog) research has demonstrated the utility of psychophysiologic sensing and analysis for identification and tracking of changes in cognitive state and to modulate human machine interactions for improving system task performance. The proposed approach leveraged prior efforts to modulate cognitive stress using a multiagent approach to acquire and analyze multiple Psychophysiologic sensory channels, including changes in vocalizations, to create a reliable and non-intrusive Detector of Acute Cognitive Strain (DACS). The DACS system provides an integrated wearable multi-modal Research Sensor Suite (RSS) using the open-source Adaptive Multiagent Integration (AMI) architecture, that includes analysis agents for electroencephalograph (EEG), electromyography (EMG), video oculography (VOG), vocalization, and others to identify and correlate physiological signatures with cognitive stress and strain. An online AMI agent-based processing algorithm was developed and applied to audio communications to evaluate for changes in speaker vocalization fundamental frequency (F0) and cadence (utterances per minute). This paper describes initial phase results of aerospace mishap vocalization stress marker detection, a potential element of the proposed DACS system. DACS could use these markers to trigger adaptive automation agents that reduce task load and allow pilots to prevent or recover from ACS episodes.
... FRANCO M. BUONAGURO,12 MICHAEL BUKRINSKY,13 ARSÈNE BURNY,14 ARNALDOCARUSO,15 SHARON ... 20 MA... more ... FRANCO M. BUONAGURO,12 MICHAEL BUKRINSKY,13 ARSÈNE BURNY,14 ARNALDOCARUSO,15 SHARON ... 20 MARIO STEVENSON,58 JAN SVOBODA,59 JIM TARTAGLIA,60GIUSEPPE TORELLI,61 ... conscious students and me to exercise our voices in the world we'll ...
This paper describes measurements made using an ECG system with QUASAR&am... more This paper describes measurements made using an ECG system with QUASAR's capacitive bioelectrodes integrated into a pad system that is placed over a chair. QUASAR's capacitive bioelectrode has the property of measuring bioelectric potentials at a small separation from the body. This enables the measurement of ECG signals through fabric, without the removal of clothing or preparation of skin. The ECG was measured through the subject's clothing while the subject sat in the chair without any supporting action from the subject. The ECG pad system is an example of a high compliance system that places minimal requirements upon the subject and, consequently, can be used to generate a long-term record from ECG segments collected on a daily basis, providing valuable information on long-term trends in cardiac health.
ABSTRACT Multiple configurations of planar, conformally-mapped multielectrode arrays (cMEAs) are ... more ABSTRACT Multiple configurations of planar, conformally-mapped multielectrode arrays (cMEAs) are used to enable stimulation and recording of hippocampal acute slice activities. The configurations of the multielectrode arrays are conformal in that the designs incorporate the specific geometrical mapping of various sub-regions of the rat hippocampus (CA1-to-CA3, dentate gyrus-to-CA3, or individual regions). The high-density feature of the arrays also provides a high spatial resolution for current-source density (CSD) analysis, with 50 μm or 60 μm center-to-center distances. Fabrication of gold and ITO (indium tin oxide) based multielectrode arrays with up to sixty-four recording/stimulating elements has been achieved. Impedance measurements are taken for the multielectrode arrays, and a simple equivalent circuit has been employed to model the electrode-electrolyte interface; cyclic voltammetry and potential monitoring experiments are performed to set guidelines and to identify limitations of stimulation protocols, thus avoiding undesirable irreversible faradaic reactions due to excess stimulation. Evoked in-vitro electrophysiological experiments with acute slices of rat hippocampus have successfully been performed using the cMEAs.
While operators performing tasks with high workload can increase task performance in response to ... more While operators performing tasks with high workload can increase task performance in response to limited increases in cognitive stress, chronic or rapidly accelerating stress can exceed the operator’s ability to compensate, generating acute cognitive strain (ACS). ACS represents a state wherein performance, situation awareness and cooperativity deteriorate markedly, leading to critical errors, mishaps or casualties. Nearly two decades of augmented cognition (AugCog) research has demonstrated the utility of psychophysiologic sensing and analysis for identification and tracking of changes in cognitive state and to modulate human machine interactions for improving system task performance. The proposed approach leveraged prior efforts to modulate cognitive stress using a multiagent approach to acquire and analyze multiple Psychophysiologic sensory channels, including changes in vocalizations, to create a reliable and non-intrusive Detector of Acute Cognitive Strain (DACS). The DACS system provides an integrated wearable multi-modal Research Sensor Suite (RSS) using the open-source Adaptive Multiagent Integration (AMI) architecture, that includes analysis agents for electroencephalograph (EEG), electromyography (EMG), video oculography (VOG), vocalization, and others to identify and correlate physiological signatures with cognitive stress and strain. An online AMI agent-based processing algorithm was developed and applied to audio communications to evaluate for changes in speaker vocalization fundamental frequency (F0) and cadence (utterances per minute). This paper describes initial phase results of aerospace mishap vocalization stress marker detection, a potential element of the proposed DACS system. DACS could use these markers to trigger adaptive automation agents that reduce task load and allow pilots to prevent or recover from ACS episodes.
2021 43rd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC), Nov 1, 2021
Conventional transcranial direct current stimulation (tDCS) protocols typically deliver 2 mA for ... more Conventional transcranial direct current stimulation (tDCS) protocols typically deliver 2 mA for 20-30 minutes. The most common administration uses a wet electrode approach which dries out in ~60 minutes at room temperature. This restricts its application to limited duration electrode-scalp contact use cases unless additional conductive media (saline, gel, or paste) is re-applied. This problem is further compounded by the subject's hair which not only presents administration challenges (interferes with electrode attachment and adhesion) but also acts as a conduit of current flow into the scalp resulting in current hotspots. This non-uniform current injection results in increased skin sensation. The aim of this study was to determine suitability of a commercially available hydrogel for DC delivery through hair. Experiments involved both non-clinical testing on an agar block and clinical testing on subjects’ forearms. Electrodes were positioned on the posterior side of the forearm that has hair for the clinical testing. Typical dose as used in tDCS was delivered and pain scores were collected. Results indicate suitable current delivery performance and all subjects tolerated delivery with pain scores ranging between 0-6. Our study paves the way for future testing on the scalp for tDCS application.Clinical Relevance—This study demonstrates the possibility of delivering tDCS through hair via dry electrodes. Specific use cases that cannot use a traditional wet electrode approach stand to benefit from the results of our work.
... Walid V. Soussou and Theodore W. Berger 121 Neurofeedback for Control of Emotions and Antisoc... more ... Walid V. Soussou and Theodore W. Berger 121 Neurofeedback for Control of Emotions and Antisocial Personality Disorders EEG handheld devices work well to ... REFERENCES Abelson, JL, G C. Curtis, O. Sagher, R C. Albucher, M. Harrigan, SF Taylor, B. Martis, and B. Giordani ...
... WALID SOUSSOU, GHASSAN GHOLMIEH, MARTIN HAN, ASHISH AHUJA, DONG SONG, MIN-CHI HSIAO, ZHUO WAN... more ... WALID SOUSSOU, GHASSAN GHOLMIEH, MARTIN HAN, ASHISH AHUJA, DONG SONG, MIN-CHI HSIAO, ZHUO WANG, ARMAND R. TANGUAY JR., AND ... how useful and easy a color spatial map can be for visually presenting a long-term potentiation (LTP) experiment run ...
International Conference on Human-Computer Interaction, 2018
While operators performing tasks with high workload can increase task performance in response to ... more While operators performing tasks with high workload can increase task performance in response to limited increases in cognitive stress, chronic or rapidly accelerating stress can exceed the operator’s ability to compensate, generating acute cognitive strain (ACS). ACS represents a state wherein performance, situation awareness and cooperativity deteriorate markedly, leading to critical errors, mishaps or casualties. Nearly two decades of augmented cognition (AugCog) research has demonstrated the utility of psychophysiologic sensing and analysis for identification and tracking of changes in cognitive state and to modulate human machine interactions for improving system task performance. The proposed approach leveraged prior efforts to modulate cognitive stress using a multiagent approach to acquire and analyze multiple Psychophysiologic sensory channels, including changes in vocalizations, to create a reliable and non-intrusive Detector of Acute Cognitive Strain (DACS). The DACS system provides an integrated wearable multi-modal Research Sensor Suite (RSS) using the open-source Adaptive Multiagent Integration (AMI) architecture, that includes analysis agents for electroencephalograph (EEG), electromyography (EMG), video oculography (VOG), vocalization, and others to identify and correlate physiological signatures with cognitive stress and strain. An online AMI agent-based processing algorithm was developed and applied to audio communications to evaluate for changes in speaker vocalization fundamental frequency (F0) and cadence (utterances per minute). This paper describes initial phase results of aerospace mishap vocalization stress marker detection, a potential element of the proposed DACS system. DACS could use these markers to trigger adaptive automation agents that reduce task load and allow pilots to prevent or recover from ACS episodes.
... FRANCO M. BUONAGURO,12 MICHAEL BUKRINSKY,13 ARSÈNE BURNY,14 ARNALDOCARUSO,15 SHARON ... 20 MA... more ... FRANCO M. BUONAGURO,12 MICHAEL BUKRINSKY,13 ARSÈNE BURNY,14 ARNALDOCARUSO,15 SHARON ... 20 MARIO STEVENSON,58 JAN SVOBODA,59 JIM TARTAGLIA,60GIUSEPPE TORELLI,61 ... conscious students and me to exercise our voices in the world we'll ...
This paper describes measurements made using an ECG system with QUASAR&am... more This paper describes measurements made using an ECG system with QUASAR's capacitive bioelectrodes integrated into a pad system that is placed over a chair. QUASAR's capacitive bioelectrode has the property of measuring bioelectric potentials at a small separation from the body. This enables the measurement of ECG signals through fabric, without the removal of clothing or preparation of skin. The ECG was measured through the subject's clothing while the subject sat in the chair without any supporting action from the subject. The ECG pad system is an example of a high compliance system that places minimal requirements upon the subject and, consequently, can be used to generate a long-term record from ECG segments collected on a daily basis, providing valuable information on long-term trends in cardiac health.
ABSTRACT Multiple configurations of planar, conformally-mapped multielectrode arrays (cMEAs) are ... more ABSTRACT Multiple configurations of planar, conformally-mapped multielectrode arrays (cMEAs) are used to enable stimulation and recording of hippocampal acute slice activities. The configurations of the multielectrode arrays are conformal in that the designs incorporate the specific geometrical mapping of various sub-regions of the rat hippocampus (CA1-to-CA3, dentate gyrus-to-CA3, or individual regions). The high-density feature of the arrays also provides a high spatial resolution for current-source density (CSD) analysis, with 50 μm or 60 μm center-to-center distances. Fabrication of gold and ITO (indium tin oxide) based multielectrode arrays with up to sixty-four recording/stimulating elements has been achieved. Impedance measurements are taken for the multielectrode arrays, and a simple equivalent circuit has been employed to model the electrode-electrolyte interface; cyclic voltammetry and potential monitoring experiments are performed to set guidelines and to identify limitations of stimulation protocols, thus avoiding undesirable irreversible faradaic reactions due to excess stimulation. Evoked in-vitro electrophysiological experiments with acute slices of rat hippocampus have successfully been performed using the cMEAs.
While operators performing tasks with high workload can increase task performance in response to ... more While operators performing tasks with high workload can increase task performance in response to limited increases in cognitive stress, chronic or rapidly accelerating stress can exceed the operator’s ability to compensate, generating acute cognitive strain (ACS). ACS represents a state wherein performance, situation awareness and cooperativity deteriorate markedly, leading to critical errors, mishaps or casualties. Nearly two decades of augmented cognition (AugCog) research has demonstrated the utility of psychophysiologic sensing and analysis for identification and tracking of changes in cognitive state and to modulate human machine interactions for improving system task performance. The proposed approach leveraged prior efforts to modulate cognitive stress using a multiagent approach to acquire and analyze multiple Psychophysiologic sensory channels, including changes in vocalizations, to create a reliable and non-intrusive Detector of Acute Cognitive Strain (DACS). The DACS system provides an integrated wearable multi-modal Research Sensor Suite (RSS) using the open-source Adaptive Multiagent Integration (AMI) architecture, that includes analysis agents for electroencephalograph (EEG), electromyography (EMG), video oculography (VOG), vocalization, and others to identify and correlate physiological signatures with cognitive stress and strain. An online AMI agent-based processing algorithm was developed and applied to audio communications to evaluate for changes in speaker vocalization fundamental frequency (F0) and cadence (utterances per minute). This paper describes initial phase results of aerospace mishap vocalization stress marker detection, a potential element of the proposed DACS system. DACS could use these markers to trigger adaptive automation agents that reduce task load and allow pilots to prevent or recover from ACS episodes.
2021 43rd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC), Nov 1, 2021
Conventional transcranial direct current stimulation (tDCS) protocols typically deliver 2 mA for ... more Conventional transcranial direct current stimulation (tDCS) protocols typically deliver 2 mA for 20-30 minutes. The most common administration uses a wet electrode approach which dries out in ~60 minutes at room temperature. This restricts its application to limited duration electrode-scalp contact use cases unless additional conductive media (saline, gel, or paste) is re-applied. This problem is further compounded by the subject's hair which not only presents administration challenges (interferes with electrode attachment and adhesion) but also acts as a conduit of current flow into the scalp resulting in current hotspots. This non-uniform current injection results in increased skin sensation. The aim of this study was to determine suitability of a commercially available hydrogel for DC delivery through hair. Experiments involved both non-clinical testing on an agar block and clinical testing on subjects’ forearms. Electrodes were positioned on the posterior side of the forearm that has hair for the clinical testing. Typical dose as used in tDCS was delivered and pain scores were collected. Results indicate suitable current delivery performance and all subjects tolerated delivery with pain scores ranging between 0-6. Our study paves the way for future testing on the scalp for tDCS application.Clinical Relevance—This study demonstrates the possibility of delivering tDCS through hair via dry electrodes. Specific use cases that cannot use a traditional wet electrode approach stand to benefit from the results of our work.
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Papers by Walid Soussou