A5049425702- Neural and Behavioral Psychology Studies
- Neural dynamics and brain function
- Functional Brain Connectivity Studies
- Visual perception and processing mechanisms
- Face Recognition and Perception
- Memory and Neural Mechanisms
- Transcranial Magnetic Stimulation Studies
- Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
- Evolutionary Psychology and Human Behavior
- Mental Health Research Topics
- Multisensory perception and integration
- Media Influence and Health
- Sexuality, Behavior, and Technology
- Aesthetic Perception and Analysis
- Humor Studies and Applications
- Bipolar Disorder and Treatment
- Hallucinations in medical conditions
- Creativity in Education and Neuroscience
- Color perception and design
- Stress Responses and Cortisol
- Dementia and Cognitive Impairment Research
- Olfactory and Sensory Function Studies
- Neuroscience and Music Perception
- Music Therapy and Health
- Bone and Dental Protein Studies
University of Georgia
2015-2025
Seton Hall University
2020
Indiana University Bloomington
2020
Center for Translational Research in Neuroimaging and Data Science
2015-2019
University of Florida
2001-2010
University of Cincinnati
2004
National Institutes of Health
2003
National Institute of Mental Health
2001
Adhering to the view that emotional reactivity is organized in part by underlying motivational states--defensive and appetitive--we investigated sex differences activation. Men's women's affective reactions were measured while participants viewed pictures with varied neutral content. As expected, highly arousing contents of threat, mutilation, erotica prompted largest both men women. Nonetheless, women showed a broad disposition respond greater defensive aversive pictures, regardless...
Functional activation (measured with fMRI) in occipital cortex was more extensive when participants view pictures strongly related to primary motive states (i.e., victims of violent death, viewer-directed threat, and erotica). This functional activity greater than that observed for less intense emotional happy families or angry faces) neutral images household objects, faces). Both the extent strength were judged affective arousal different picture contents, same pattern present whether...
Dense-array electrocortical and functional hemodynamic measures of human brain activity were collected to assess the relationship between 2 established neural emotional reactivity. Recorded in parallel sessions, slow-wave late positive potential (LPP) visual cortical blood oxygen level–dependent (BOLD) signals both modulated by rated intensity picture arousal. The amplitude LPP correlated significantly with BOLD lateral occipital, inferotemporal, parietal areas across contents. Estimated...
Activity in extrastriate visual cortex is greater when people view emotional relative to neutral pictures. Prior brain imaging and psychophysiological work has further suggested a bias for men react more strongly pleasant pictures, women unpleasant Here we investigated cortical activity using fMRI 28 during picture viewing. Men showed reliably reactivity both neutral, consistent with the that motivational relevance of stimuli directs attention enhances elaborative perceptual processing....
Recent human functional imaging studies have linked the processing of pleasant visual stimuli to activity in mesolimbic reward structures. However, whether activation is driven specifically by pleasantness stimulus, or its salience, unresolved. Here we find two that free viewing images erotic and romantic couples prompts clear, reliable increases nucleus accumbens (NAc) medial prefrontal cortex (mPFC) activity, whereas equally arousing (salient) unpleasant images, neutral pictures, do not....
Abstract Research on emotional perception and learning indicates appetitive cues engage nucleus accumbens (NAc) medial prefrontal cortex (mPFC), whereas amygdala activity is modulated by the intensity of aversive cues. This study sought to determine patterns functional activation connectivity among these regions during narrative imagery. Using event‐related fMRI, we investigate structures when participants vividly imagine pleasant, neutral, unpleasant scenes. Results indicate that pleasant...
Models of visual emotional perception suggest a reentrant organization the ventral system with amygdala. Using focused functional magnetic resonance imaging in humans sampling rate 100 ms, here we determine relative timing discrimination amygdala and cortical structures during perception. Results show that inferotemporal cortex differentiate from nonemotional scenes ∼1 s before extrastriate occipital cortex, whereas primary shows consistent activity across all scenes. This pattern is...
Re-entrant modulation of visual cortex has been suggested as a critical process for enhancing perception emotionally arousing stimuli. This study explores how the time information inherent in large-scale electrocortical measures can be used to examine functional relationships among structures involved emotional perception. Granger causality analysis was conducted on steady-state evoked potentials elicited by pictures flickering at rate 10 Hz. procedure allows one direction neural...
Convoluted cortical folding and neuronal wiring are 2 prominent attributes of the mammalian brain. However, macroscale intrinsic relationship between these general cross-species attributes, as well underlying principles that sculpt architecture cerebral cortex, remains unclear. Here, we show axonal fibers connected to gyri significantly denser than those sulci. In human, chimpanzee, macaque brains, a dominant fraction were found be gyri. This finding has been replicated in range brains via...
Affectively arousing visual stimuli have been suggested to automatically attract attentional resources in order optimize sensory processing. The present study crosses the factors of spatial selective attention and affective content, examines relationship between instructed (spatial) automatic stimuli. In addition response times error rate, electroencephalographic data from 129 electrodes were recorded during a covert task. This task required silent counting random-dot targets embedded 10 Hz...
Converging electrophysiological and hemodynamic findings indicate sensory processing of emotional pictures is preferred to that neutral pictures. Whereas neuroimaging studies picture perception have employed stimulus durations lasting several seconds, recent electrocortical investigations report early visual cortical discrimination between emotionally arousing processing. Here, we use a hybrid presentation paradigm covering range rapid rates (0.75–6 Hz), while system activity recorded with...
Startle modulation was investigated as participants first anticipated and then viewed affective pictures in order to determine whether of the startle reflex is similar these different task contexts. During a 6-s anticipation period, neutral light cue signaled upcoming picture would portray snakes, erotica, or household objects; at end anticipatory category for 6 s. Male highly fearful snakes were recruited maximize emotional arousal during perception. Results indicated that potentiated when...
Depressive patients typically show biased attention towards unpleasant and away from pleasant emotional material. Imaging studies suggest that dysfunctions in a distributed neural network, including the ventromedial prefrontal cortex (vmPFC), are associated with this processing bias. Accordingly, changes vmPFC activation should mediate of stimuli. Here, we investigated effect inhibitory excitatory transcranial direct current stimulation (tDCS) on scene two within-subject experiments using...
Abstract Electrophysiological studies of human visual perception typically involve averaging across trials distributed over time during an experimental session. Using oscillatory presentation, in which affective or neutral pictures were presented for 6 s, flickering on and off at a rate 10 Hz, the present study examined single steady‐state evoked potentials. Moving window subsequent Fourier analysis stimulation frequency yielded spectral amplitude measures electrocortical activity....