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Chris Berka
University of California, San Diego
77Publications
17H-index
1,730Citations
Publications 76
Newest
#1Timothy S. Brown (UI: University of Iowa)H-Index: 2
#2Timothy L. Brown (UI: University of Iowa)H-Index: 17
Last.Chris BerkaH-Index: 17
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AbstractObjective: The objective of this study was to use electroencephalogram (EEG) biomarkers derived from a short, easily administered neurocognitive testbed to determine acute cannabis intoxica...
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Oct 1, 2019 in SMC (Systems, Man and Cybernetics)
#1Amir H. MeghdadiH-Index: 8
Last.Chris BerkaH-Index: 17
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Automated quantitative analysis of EEG data is ubiquitous in clinical neurophysiology research. However, these methods have not been fully adopted in medical practice, specifically to inform clinical diagnosis of neurological disorders. In this paper, some of the benefits and challenges of using these techniques as biomarkers for disease indication and progression are discussed. Examples of baseline EEG (resting state) data acquired with the same system and software from patients diagnosed with ...
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Jul 26, 2019 in INTERACT (International Conference on Human-Computer Interaction)
#2Chris BerkaH-Index: 17
Last.Ajay VermaH-Index: 10
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The co-acquisition of EEG in a virtual environment (VE) would give researchers and clinicians the opportunity to acquire EEG data with millisecond-level temporal resolution while participants performed VE activities. This study integrated Advanced Brain Monitoring’s (ABM) X-24t EEG hardware with the HTC Vive VR headset and investigated EEG differences in tasks delivered in two modalities: VE and a desktop computer.
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#1Amir H. MeghdadiH-Index: 8
#2Chris BerkaH-Index: 17
Last.David H. SalatH-Index: 60
view all 7 authors...
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#2Charlene E. Gamaldo (JHUSOM: Johns Hopkins University School of Medicine)H-Index: 18
Last.Chris BerkaH-Index: 17
view all 8 authors...
1 CitationsSource
#2Chris BerkaH-Index: 17
Last.Thomas D. Marcotte (UCSD: University of California, San Diego)H-Index: 46
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The number of older drivers is steadily increasing, and advancing age is associated with a high rate of automobile crashes and fatalities. This can be attributed to a combination of factors including decline in sensory, motor, and cognitive functions due to natural ageing or neurodegenerative diseases such as HIV-Associated Neurocognitive Disorder (HAND). Current clinical assessment methods only modestly predict impaired driving. Thus, there is a need for inexpensive and scalable tools to predic...
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Objective: To demonstrate the utility of rheoencephalography (REG) for measuring cerebral blood flow and fluid dynamics during different stages of sleep. Methods: Anteroposterior cranial electrical impedance was measured with concurrent polysomnography in a group of healthy subjects during sleep. Transcranial electrical impedance was characterized by measuring the peak-to-trough and envelope of the filtered pulsative REG signal as well as its frequency. The sensitivity of the REG amplitude to ch...
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#2Erik K. St. LouisH-Index: 24
Last.Chris BerkaH-Index: 17
view all 6 authors...
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#1Elena Ratti (Biogen Idec)H-Index: 1
#2Shani WaningerH-Index: 2
Last.Ajay Verma (Biogen Idec)H-Index: 10
view all 5 authors...
Objectives: To compare quantitative EEG signal and test-retest reliability of medical grade and consumer EEG systems. Methods: Resting state EEG was acquired by two medical grade (B-Alert, Enobio) and two consumer (Muse, Mindwave) EEG systems in 5 healthy subjects during two study visits. EEG patterns, power spectral densities (PSDs) and test/retest reliability in eyes closed and eyes open conditions were compared across the four systems, focusing on Fp1, the only common electrode. Fp1 PSDs were...
16 CitationsSource
Jul 9, 2017 in INTERACT (International Conference on Human-Computer Interaction)
Last.Chris BerkaH-Index: 17
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Technology continues to advance at exponential rates and we are exposed to a multitude of electronic interfaces in almost every aspect of our lives. In order to achieve seamless integration of both, human and technology, we must examine the objective and subjective responses to such interactions. The goal of this study was to examine neurophysiological responses to movement, communication, and usability with a robot assistant, in comparison to human assistant, in a real-world setting. OSHbot (ro...
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