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John Hermiz
University of California, San Diego
7Publications
3H-index
25Citations
Publications 7
Newest
#1Angelique C. Paulk (Harvard University)H-Index: 16
#2Jae-Hyun Yang (Harvard University)H-Index: 1
Last.Sydney S. Cash (Harvard University)H-Index: 46
view all 29 authors...
Efforts to deepen our understanding of the nervous system depends on high resolution sampling of neuronal activity. We leveraged clinically necessary intracranial monitoring performed during surgical resections to record from the cortical surface (N=30) using high spatial resolution, low impedance PEDOT:PSS microelectrodes. We identified three classes of activity. The first included relatively fast repeated waveforms with kinetics similar to, but not perfectly matching, extracellular single unit...
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#1Nicholas Rogers (UCSD: University of California, San Diego)H-Index: 1
#2John Hermiz (UCSD: University of California, San Diego)H-Index: 3
Last.Vikash Gilja (UCSD: University of California, San Diego)H-Index: 24
view all 14 authors...
Electrocorticography (ECoG) is becoming more prevalent due to improvements in fabrication and recording technology as well as its ease of implantation compared to intracortical electrophysiology, larger cortical coverage, and potential advantages for use in long term chronic implantation. Given the flexibility in the design of ECoG grids, which is only increasing, it remains an open question what geometry of the electrodes is optimal for an application. Conductive polymer, PEDOT:PSS, coated micr...
1 CitationsSource
#1Alfredo Lucas (UCSD: University of California, San Diego)H-Index: 1
#2John Hermiz (UCSD: University of California, San Diego)H-Index: 3
Last.Vikash Gilja (UCSD: University of California, San Diego)H-Index: 24
view all 6 authors...
Stroke patients are monitored hourly by physicians and nurses in an attempt to better understand their physical state. To quantify the patients’ level of mobility, hourly movement (i.e. motor) assessment scores are performed, which can be taxing and time-consuming for nurses and physicians. In this paper, we attempt to find a correlation between patient motor scores and continuous accelerometer data recorded in subjects who are unilaterally impaired due to stroke. The accelerometers were placed ...
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#1John Hermiz (UCSD: University of California, San Diego)H-Index: 3
#2Nicholas Rogers (UCSD: University of California, San Diego)H-Index: 1
Last.Vikash Gilja (UCSD: University of California, San Diego)H-Index: 24
view all 10 authors...
Abstract Electrocorticography (ECoG), electrophysiological recording from the pial surface of the brain, is a critical measurement technique for clinical neurophysiology, basic neurophysiology studies, and demonstrates great promise for the development of neural prosthetic devices for assistive applications and the treatment of neurological disorders. Recent advances in device engineering are poised to enable orders of magnitude increase in the resolution of ECoG without comprised measurement qu...
4 CitationsSource
#1Mehran Ganji (UCSD: University of California, San Diego)H-Index: 4
#2Erik Kaestner (UCSD: University of California, San Diego)H-Index: 5
Last.Shadi A. Dayeh (UCSD: University of California, San Diego)H-Index: 32
view all 18 authors...
Recording neural activity during neurosurgical interventions is an invaluable tool for both improving patient outcomes and advancing our understanding of neural mechanisms and organization. However, increasing clinical electrodes' signal-to-noise and spatial specificity requires overcoming substantial physical barriers due to the compromised metal electrochemical interface properties. The electrochemical properties of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) based inte...
16 CitationsSource
Aug 1, 2016 in EMBC (International Conference of the IEEE Engineering in Medicine and Biology Society)
#1John Hermiz (UCSD: University of California, San Diego)H-Index: 3
#2Nick Rogers (UCSD: University of California, San Diego)H-Index: 3
Last.Vikash Gilja (UCSD: University of California, San Diego)H-Index: 24
view all 10 authors...
Open source electrophysiology (ephys) recording systems have several advantages over commercial systems such as customization and affordability enabling more researchers to conduct ephys experiments. Notable open source ephys systems include Open-Ephys, NeuroRighter and more recently Willow, all of which have high channel count (64+), scalability, and advanced software to develop on top of. However, little work has been done to build an open source ephys system that is clinic compatible, particu...
4 CitationsSource
#1Jamie Nicole LaBuzetta (UCSD: University of California, San Diego)H-Index: 3
#2John Hermiz (UCSD: University of California, San Diego)H-Index: 3
Last.Navaz Karanjia (UCSD: University of California, San Diego)H-Index: 2
view all 4 authors...
Objective: We explore the feasibility of automating motor function scoring by using continuous accelerometer measurements to identify characteristics present in both accelerometer recordings and motor exam scores. Background: The neurological motor exam provides important information about a patient’s clinical status in the ICU, but the frequency at which it needs to be performed often makes it arduous for both healthcare providers and patients. Methods: Patients with unilateral motor impairment...
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