Results 81 to 90 of about 1,285,227 (187)

From reference to sense: how the brain encodes meaning for speaking

open access: yesFrontiers in Psychology, 2012
In speaking, semantic encoding is the conversion of a nonverbal mental representation (the reference) into a semantic structure suitable for expression (the sense).
Laura eMenenti   +4 more
doaj   +1 more source

Time Adaptation Shows Duration Selectivity in the Human Parietal Cortex.

open access: yesPLoS Biology, 2015
Although psychological and computational models of time estimation have postulated the existence of neural representations tuned for specific durations, empirical evidence of this notion has been lacking.
Masamichi J Hayashi   +7 more
doaj   +1 more source

Seeing the world through non rose-colored glasses: anxiety and the amygdala response to blended expressions.

open access: yesFrontiers in Human Neuroscience, 2015
Anxious individuals have a greater tendency to categorize faces with ambiguous emotional expressions as fearful (Richards et al., 2002). These behavioral findings might reflect anxiety-related biases in stimulus representation within the human amygdala ...
Sonia eBishop   +3 more
doaj   +1 more source

Functional imaging of numerical processing in adults and 4-y-old children.

open access: yesPLoS Biology, 2006
Adult humans, infants, pre-school children, and non-human animals appear to share a system of approximate numerical processing for non-symbolic stimuli such as arrays of dots or sequences of tones.
Jessica F Cantlon   +3 more
doaj   +1 more source

Reduced neural specificity in middle-aged HIV+ women in the absence of behavioral deficits

open access: yesNeuroImage: Clinical, 2015
In the post combination antiretroviral therapy (cART) era, the prevalence of mild forms of HIV-associated neurocognitive disorders (HAND) in individuals with HIV-infection remains high.
Chenglong Liu   +4 more
doaj   +1 more source

Stages of Nonsymbolic Number Processing in Occipitoparietal Cortex Disentangled by fMRI Adaptation

open access: yesJournal of Neuroscience, 2011
The neurobiological mechanisms of nonsymbolic number processing in humans are still unclear. Computational modeling proposed three successive stages: first, the spatial location of objects is stored in an object location map; second, this information is ...
Chantal Roggeman   +3 more
semanticscholar   +1 more source

Adaptively and Spatially Estimating the Hemodynamic Response Functions in fMRI [PDF]

open access: yes, 2011
In an event-related functional MRI data analysis, an accurate and robust extraction of the hemodynamic response function (HRF) and its associated statistics (e.g., magnitude, width, and time to peak) is critical to infer quantitative information about the relative timing of the neuronal events in different brain regions.
Jiaping, Wang   +4 more
openaire   +2 more sources

Selectivity of Adaptation in Single Units: Implications for fMRI Experiments [PDF]

open access: yesNeuron, 2006
Understanding the neural basis of adaptation (repetition suppression) is critical for interpreting fMRI-adaptation experiments. Sawamura and colleagues provide a critical stepping-stone by elucidating the relation between neural adaptation and response selectivity. They find some cross-adaptation by two different stimuli that activate the same neuron.
openaire   +2 more sources

FMRI adaptation during performance of learned arbitrary visuomotor conditional associations

open access: yesNeuroImage, 2009
In everyday life, people select motor responses according to arbitrary rules. For example, our movements while driving a car can be instructed by color cues that we see on traffic lights. These stimuli do not spatially relate to the actions that they specify.
Philippe A, Chouinard, Melvyn A, Goodale
openaire   +2 more sources

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