Zobrazeno 1 - 10
of 145
pro vyhledávání: '"Ralph D. Freeman"'
Publikováno v:
Philos Trans R Soc Lond B Biol Sci
Philosophical transactions of the Royal Society of London. Series B, Biological sciences, vol 376, iss 1815
Philosophical transactions of the Royal Society of London. Series B, Biological sciences, vol 376, iss 1815
Functional neuroimaging using MRI relies on measurements of blood oxygen level-dependent (BOLD) signals from which inferences are made about the underlying neuronal activity. This is possible because neuronal activity elicits increases in blood flow
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ca6a8e88eb54e5bc7859beef287b528
http://sro.sussex.ac.uk/id/eprint/94251/1/HALL_Philosophical_Transactions_B_Sep_2020(2).pdf
http://sro.sussex.ac.uk/id/eprint/94251/1/HALL_Philosophical_Transactions_B_Sep_2020(2).pdf
Autor:
Ralph D. Freeman
Publikováno v:
Optometry and vision science : official publication of the American Academy of Optometry, vol 94, iss 10
During a Research Career Development Award from the National Eye Institute, I spent a year at the University of Cambridge doing research with John Robson. The goal was to use a visual stimulation approach that had not been previously attempted, with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e7304648dcfd33c863f810b2eda745c1
https://doi.org/10.1097/opx.0000000000001116
https://doi.org/10.1097/opx.0000000000001116
Autor:
Baowang Li, Ralph D. Freeman
Publikováno v:
Neuroscience. 248:529-540
Non-invasive brain imaging requires comprehensive interpretation of hemodynamic signals. In functional magnetic resonance imaging, blood oxygen level dependent (BOLD) signals are used to infer neural processes. This necessitates a clear understanding
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d39fdf48e34434207fc0da0f32089f2
https://doi.org/10.1016/j.neuroscience.2013.06.036
https://doi.org/10.1016/j.neuroscience.2013.06.036
Autor:
Baowang Li, Ralph D. Freeman
Publikováno v:
Philosophical transactions of the Royal Society of London. Series B, Biological sciences. 371(1705)
Studies are described which are intended to improve our understanding of the primary measurements made in non-invasive neural imaging. The blood oxygenation level-dependent signal used in functional magnetic resonance imaging (fMRI) reflects changes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae294a221f5fb060bbdb809114487c47
https://pubmed.ncbi.nlm.nih.gov/27574310
https://pubmed.ncbi.nlm.nih.gov/27574310
Autor:
Ralph D. Freeman, Taekjun Kim
Neurons in the visual cortex are generally selective to direction of movement of a stimulus. Although models of this direction selectivity (DS) assume linearity, experimental data show stronger degrees of DS than those predicted by linear models. Our
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::98f7c182e82ec94eab927d08ee56506f
https://europepmc.org/articles/PMC4874909/
https://europepmc.org/articles/PMC4874909/
Autor:
Baowang Li, Ralph D. Freeman
Publikováno v:
Neuroscience. 213:112-121
Noninvasive neural imaging has become an important tool in both applied and theoretical applications. The hemodynamic properties that are measured in functional magnetic resonance imaging (fMRI), for example, are generally used to infer neuronal char
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef54e62a87d5bf45f3302805ecc23eef
https://doi.org/10.1016/j.neuroscience.2012.04.007
https://doi.org/10.1016/j.neuroscience.2012.04.007
Autor:
Bartlett D. Moore, Ralph D. Freeman
Publikováno v:
Journal of Neurophysiology. 107:2506-2516
Orientation selectivity and its development are basic features of visual cortex. The original model of orientation selectivity proposes that elongated simple cell receptive fields are constructed from convergent input of an array of lateral geniculat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::72253e0799b3a88b722ede7870bc01fd
https://doi.org/10.1152/jn.00719.2011
https://doi.org/10.1152/jn.00719.2011
Autor:
Baowang Li, Ralph D. Freeman
Publikováno v:
The Journal of Physiology. 589:3175-3190
Neurons in visual cortex exhibit two major types of stimulus elicited suppression. One, cross-orientation suppression, occurs within the classical receptive field (CRF) when an orthogonal grating is superposed on one at optimal orientation. The secon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72d5bed7c3b17c1132bd84b56d7fd427
https://doi.org/10.1113/jphysiol.2011.205039
https://doi.org/10.1113/jphysiol.2011.205039
Publikováno v:
Neuron. 62(2):291-303
SummaryElectrical brain stimulation is a promising tool for both experimental and clinical applications. However, the effects of stimulation on neuronal activity are highly variable and poorly understood. To investigate the basis of this variability,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c2647383c1288f28ed9249788075f8f1
Contrast Sensitivity Is Enhanced by Expansive Nonlinear Processing in the Lateral Geniculate Nucleus
Autor:
Thang Duong, Ralph D. Freeman
Publikováno v:
Journal of Neurophysiology. 99:367-372
The firing rates of neurons in the central visual pathway vary with stimulus strength, but not necessarily in a linear manner. In the contrast domain, the neural response function for cells in the primary visual cortex is characterized by expansive a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::26f420ca1b7d6fa785481bd596fbbc56
https://doi.org/10.1152/jn.00873.2007
https://doi.org/10.1152/jn.00873.2007