A5070810765- Neural dynamics and brain function
- Neuroscience and Neural Engineering
- EEG and Brain-Computer Interfaces
- Retinal Development and Disorders
- Visual perception and processing mechanisms
- Terahertz technology and applications
- Muscle activation and electromyography studies
- Acoustic Wave Resonator Technologies
- Thermography and Photoacoustic Techniques
- CCD and CMOS Imaging Sensors
- Advanced machining processes and optimization
- Laser Material Processing Techniques
- Injection Molding Process and Properties
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2020-2021
Direction de la Recherche Technologique
2020-2021
Stanford University
2010-2011
Neurosciences Institute
2006
Salk Institute for Biological Studies
2002-2004
University of California, San Diego
2002-2003
Functional asymmetries in the ON and OFF pathways of primate visual system were examined using simultaneous multi-electrode recordings from dozens retinal ganglion cells (RGCs) vitro . Light responses RGCs characterized white noise stimulation. Two distinct functional types frequently encountered, one OFF, had non-opponent spectral sensitivity, relatively high response gain, transient light responses, large receptive fields (RFs) that tiled region retina recorded, suggesting they belonged to...
A multielectrode array system has been developed to study how the retina processes and encodes visual images. This can simultaneously record extracellular electrical activity from hundreds of retinal output neurons as a dynamic image is focused on input neurons. The signals detected be correlated with neural code used by eye send information about world brain. consists following components: 1) 32 /spl times/ 16 rectangular 512 planar microelectrodes sensitive area 1.7 mm/sup 2/; electrode...
Recent studies have examined the temporal precision of spiking in visual system neurons, but less is known about time scale that relevant for behaviorally important computations. We how spatiotemporal patterns spikes ensembles primate retinal ganglion cells convey information motion to brain. The direction a bar was estimated by comparing timing responses parasol (magnocellular-projecting) recorded simultaneously, using cross-correlation approach similar standard models sensing. To identify...
Understanding the relationship between neural activity in motor cortex and muscle during movements is important both for basic science design of prostheses. While there has been significant work decoding EMG from data, decoders often require many parameters which make analysis susceptible to overfitting, reduces generalizability makes results difficult interpret. To address this issue, we recorded simultaneous cortices (M1/PMd) rhesus monkeys performing an arm-reaching task while recording...
Sensing motion requires reading out spatiotemporal patterns of activity from ensembles neurons in the early visual pathways. Most models this process do not incorporate noise, spatial and temporal sampling, or nonlinearities present retinal ganglion cell (RGC) light responses. To probe whether downstream processing places ultimate limit on sensing, we compared psychophysical speed discrimination to limits imposed by ensemble responses primate RGCs. 512-electrode recordings were used measure...
Terahertz (THz) reflective imaging and scanning acoustic microscopy (SAM) were utilized for material characterization as well quality control of an injection-molded thermoplastic electrical receptacle plate. V-notched weld lines that degrade the mechanical strength products significantly, are observed in both SAM THz results. The dimension V-shaped morphological feature line is ~ 400 μm width 10 depth. Position resolved birefringence also locates line.