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CATEGORIES:Colloquium/Seminar
DESCRIPTION:Title: Galvanic Vestibular Stimulation and Computational Models
  of Human Vestibular Processing\n\nPresenter: Dr. Torin Clark\, Associate P
 rofessor\, Bioserve Space Technologies\, College of Engineering and Applied
  Science\, University of Colorado Boulder\n\nAbstract: The vestibular syste
 m\, in the inner ear\, senses motion and orientation of our heads\, critica
 l for balance and other functions. Galvanic vestibular stimulation (GVS) ap
 plies low levels of electrical current to the mastoids\, behind the ears\, 
 to artificially stimulate the vestibular system. Here we explore potential 
 applications of (GVS)\, beginning with use as an alternative display modali
 ty to visual and auditory displays. We find that "bursts" of sinusoidal GVS
  waveforms can be reliably distinguished by modulating the frequency and th
 at this is robust to different environments (in the dark\, light\, sitting\
 , standing\, etc). Further\, these GVS cues are not destabilizing\, such th
 at they could be used to operational environments (e.g.\, to signal a firef
 ighter). Next\, we explore applying noisy GVS waveforms aimed at producing 
 stochastic resonance. In addition to improving (i.e.\, reducing) vestibular
  (self-motion) perceptual thresholds\, we find evidence of cross-modal stoc
 hastic resonance\, improving visual\, auditory\, and tactile perceptual thr
 esholds. Transitioning to computational models of spatial orientation perce
 ption\, we analyze visual-vestibular integration during transitions in the 
 availability of visual cues. Such models could be used in real-time to iden
 tify if an aircraft pilot is spatial disoriented and trigger and pilot aidi
 ng system to prevent accidents and improve performance. Finally\, we levera
 ge the model to consider the computations the brain may use to reinterpret 
 sensory cues during gravity transitions (e.g.\, landing on the moon). In a 
 Bayesian framework with parallel alternative hypotheses for the magnitude o
 f gravity\, the brain could dynamically update a probability distribution t
 o minimize sensory conflict. We implement and simulate the model to quantif
 y predictions for the time course of adaptation to altered gravity. \n\nBio
 : Torin Clark is an Associate Professor in the Smead Aerospace Engineering 
 Sciences Department and Biomedical Engineering Program at CU-Boulder. He is
  a member of the Bioastronautics Laboratory and faculty affiliate of BioSer
 ve Space Technologies.\n\nHis research is focused on the challenges that hu
 mans face during space exploration missions. This includes astronaut biomed
 ical issues\, space human factors\, human sensorimotor/vestibular function 
 and adaptation\, interaction of human-autonomous and human-robotic systems\
 , mathematical models of spatial orientation perception\, and human-in-the-
 loop experiments. \n\nhttps://www.colorado.edu/faculty/clark-torin/
DTEND:20230922T200000Z
DTSTAMP:20260310T004140Z
DTSTART:20230922T180000Z
GEO:40.008252;-105.268415
LOCATION:Muenzinger Psychology\, D430
SEQUENCE:0
SUMMARY:ICS Colloquium: Dr. Torin Clark\, Associate Professor\, Bioserve Sp
 ace Technologies\, College of Engineering and Applied Science\, University 
 of Colorado Boulder
UID:tag:localist.com\,2008:EventInstance_43968731829079
URL:https://calendar.colorado.edu/event/ics_colloquium_dr_torin_clark_assoc
 iate_professor_bioserve_space_technologies_college_of_engineering_and_appli
 ed_science_cu_boulder
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