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Asymmetric modulation of human visual cortex activity during 10° lateral gaze (fMRI study)

A. Deutschländer, E. Marx, T. Stephan, E. Riedel, M. Wiesmann, M. Dieterich, T. Brandt
2005 NeuroImage  
We used BOLD fMRI to study the differential effects of the direction of gaze on the visual and the ocular motor systems.  ...  During lateral fixation, deactivations in higher-order visual areas (one ventral cluster in the lingual and fusiform gyri and one dorsal cluster in the posterosuperior cuneus) and, as a trend, activations  ...  central fixation (group analysis; n = 13; P < 0.001) Lateral gaze modulates human visual cortex activity with preference of the hemisphere contralateral to gaze direction Asymmetric activations and deactivations  ... 
doi:10.1016/j.neuroimage.2005.06.001 pmid:16005247 fatcat:fs6phvg7jzeyhlazxz4ikh5yze

An fMRI Study of the Ventriloquism Effect

Akiko Callan, Daniel Callan, Hiroshi Ando
2015 Cerebral Cortex  
This study was performed in 2 steps. First, we investigated how sound locations were represented in the auditory cortex.  ...  Ventriloquists make good use of this auditory illusion. In this study, we investigated neural substrates of the ventriloquism effect to understand the neural mechanism of multimodal integration.  ...  Notes We express our gratitude to Drs Hiroaki Kato and Ryouichi Nishimura for helpful advice in early phases of this work. Conflict of Interest: None declared.  ... 
doi:10.1093/cercor/bhu306 pmid:25577576 pmcid:PMC4816779 fatcat:k3y66vcf7fexjlhffury3qjdwa

Expectancies influence attention to neutral but not necessarily to threatening stimuli: An fMRI study

Tatjana Aue, Raphaël Guex, Léa A S Chauvigné, Hadas Okon-Singer, Patrik Vuilleumier
2018 Emotion  
Predictive cues in our study evoked specific behavioral and neural expectancy states and effectively modulated response latencies to detect neutral (bird) targets in a 3 × 3 visual search matrix: When  ...  The origin of this asymmetry, however, remains unclear. Here, therefore, we investigated its neural basis by using fMRI.  ...  Acknowledgements This research was supported by grant PZ001P1_121590 of the Swiss National Science Foundation to Tatjana Aue. We kindly thank Bruno Bonet for his support in data acquisition.  ... 
doi:10.1037/emo0000496 pmid:30475038 fatcat:bi36dokmmjhvvesmh4pr2twdtq

Unfamiliar Walking Movements Are Detected Early in the Visual Stream: An fMRI Study

Vincenzo Maffei, Maria Assunta Giusti, Emiliano Macaluso, Francesco Lacquaniti, Paolo Viviani
2014 Cerebral Cortex  
TOJ activation signals the detection in unfamiliar scenes of a mismatch between facing orientation and visual movement direction.  ...  The study demonstrates that unfamiliar walking movements are detected earlier than so far assumed along the visual movement processing stream.  ...  Conflict of Interest: The authors declare no competing financial interests.  ... 
doi:10.1093/cercor/bhu008 pmid:24532318 fatcat:7j2fdnyewvcnhcyaklwe3labte

Is there a role of visual cortex in spatial hearing?

Ulrike Zimmer, Jörg Lewald, Michael Erb, Wolfgang Grodd, Hans-Otto Karnath
2004 European Journal of Neuroscience  
When gaze was to the left or right, we found the primary visual cortex (V1 ⁄ V2) activated in both hemispheres.  ...  Using functional magnetic resonance imaging, we investigated which cortical areas of the human brain participate in such auditory-visual coordinate transformations.  ...  Abbreviations fMRI, functional magnetic resonance imaging; GLM, general linear model; hrf, haemodynamic response function; ILD, interaural level differences; LIP, lateral intraparietal area; MNI, Montreal  ... 
doi:10.1111/j.1460-9568.2004.03766.x pmid:15579169 fatcat:btl6fsswkveczno5jnin3goq7q

Representation of Eye Position in the Human Parietal Cortex

Adrian L. Williams, Andrew T. Smith
2010 Journal of Neurophysiology  
During data acquisition, participants were cued to direct their gaze to the left or right for sustained periods as part of a block-design paradigm.  ...  Here we present data from functional MRI experiments that are consistent with the existence of neurons sensitive to eye position in darkness in the human posterior parietal cortex.  ...  It is known from functional MRI (fMRI) studies that both motor-related and visual activity can be influenced by direction of gaze (Baker et al. 1999) .  ... 
doi:10.1152/jn.00713.2009 pmid:20719926 fatcat:lpaoaepgzfbjzdadjkttj32urm

Visual Responses of the Human Superior Colliculus: A High-Resolution Functional Magnetic Resonance Imaging Study

Keith A. Schneider, Sabine Kastner
2005 Journal of Neurophysiology  
Our results provide first insights into basic visual responses of the human SC and show the feasibility of studying subcortical structures using high-resolution fMRI. Astruc J.  ...  Here, we performed a series of high-resolution fMRI studies at 3 T to investigate basic visual response properties of the SC.  ...  Our results show that high-resolution fMRI can be used effectively to study response properties of the human SC.  ... 
doi:10.1152/jn.00288.2005 pmid:15944234 fatcat:kiz45kibbvf4hid3omrqlecx6q

Asymmetries of the human social brain in the visual, auditory and chemical modalities

A. Brancucci, G. Lucci, A. Mazzatenta, L. Tommasi
2009 Philosophical Transactions of the Royal Society of London. Biological Sciences  
Structural and functional asymmetries are present in many regions of the human brain responsible for motor control, sensory and cognitive functions and communication.  ...  Here, we focus on hemispheric asymmetries underlying the domain of social perception, broadly conceived as the analysis of information about other individuals based on acoustic, visual and chemical signals  ...  Some lateralization has also been found in the amygdala: Wicker et al. (1998) found a strong activation of the right amygdala during gaze perception.  ... 
doi:10.1098/rstb.2008.0279 pmid:19064350 pmcid:PMC2666086 fatcat:7h7ijxaodrg4fnkxhzrobwajui

The functional neuro-anatomy of the human response to fear: A brief review

A Del Casale, S Ferracuti, G D Kotzalidis, C Rapinesi, D Serata, E Ambrosi, A Simonetti, V Savoja, M Pompili, G Angeletti, R Tatarelli, P Girardi
2011 South African Journal of Psychiatry  
Functional neuroimaging studies of the neural basis of fear during the last few decades in humans contributed to significant advancement in the understanding of its mechanisms.  ...  Imaging studies help us delineating the role of amygdala-based neurocircuitry in fear activation and attention capture.  ...  Most of these studies were published in the last 10 years. Fear perception and modulation Several functional imaging studies focused on areas activated in healthy people after fearful stimuli.  ... 
doi:10.4102/sajpsychiatry.v17i1.270 fatcat:5yflcw5in5davekemszz56pmy4

Neural activity underlying tinnitus generation: Results from PET and fMRI

C.P. Lanting, E. de Kleine, P. van Dijk
2009 Hearing Research  
Even though there are many differences across studies, the general trend emerging from the neuroimaging studies reviewed, is that tinnitus in humans may correspond to enhanced neural activity across several  ...  e neuroimaging methods fMRI and PET measure signals that presumably reflect the firing rates of multiple neurons and are assumed to be sensitive to changes in the level of neural activity.  ...  e study is part of the research program of our department: Communication through Hearing and Speech.  ... 
doi:10.1016/j.heares.2009.06.009 pmid:19545617 fatcat:xtbdw3lbmfd2jd4zaptfps7i2e

Functional brain imaging of peripheral and central vestibular disorders

Marianne Dieterich, Thomas Brandt
2008 Brain  
Most of it derives from brain activation studies with PET and fMRI conducted over the last decade.  ...  visual and somatosensory cortex areas. (2) In patients with bilateral vestibular failure the activation^deactivation pattern during vestibular caloric stimulation shows a decrease of activations and deactivations  ...  Note that the locations of the activated areas during galvanic stimulation of the vestibular nerve (fMRI; top right) are similar in humans.  ... 
doi:10.1093/brain/awn042 pmid:18515323 fatcat:kpeief2ul5cahjtmkx33ybcog4

Visual and proprioceptive interaction in patients with bilateral vestibular loss

Nicholas J. Cutfield, Gregory Scott, Adam D. Waldman, David J. Sharp, Adolfo M. Bronstein
2014 NeuroImage: Clinical  
This included a reduction in visual motion responses during high levels of proprioceptive input and differential activation in the midline cerebellum.  ...  An fMRI cervico-visual interaction may thus substitute the known visuo-vestibular interaction reported in normal subject fMRI studies.  ...  In the patient group, the interaction ((ML + SH) N (MH + SL)) showed an asymmetric pattern of activation in the left lateral occipital pole and the inferior part of the left lateral occipital cortex, with  ... 
doi:10.1016/j.nicl.2013.12.013 pmid:25061564 pmcid:PMC4107374 fatcat:jpqzbij4ujazncln3zufesxmwu

A Preferential Role for Ventromedial Prefrontal Cortex in Assessing "the Value of the Whole" in Multiattribute Object Evaluation

Gabriel Pelletier, Nadav Aridan, Lesley K. Fellows, Tom Schonberg
2021 Journal of Neuroscience  
In two samples of healthy human male and female participants undergoing eye tracking and functional magnetic resonance imaging (fMRI) while evaluating novel pseudo objects, we found evidence for both forms  ...  Ventromedial prefrontal cortex (vmPFC) and perirhinal cortex were engaged when configural processing was required.  ...  Value-modulated activation clusters during value rating in the vmPFC. A, Clusters where the fMRI signal was significantly modulated by value in configural trials.  ... 
doi:10.1523/jneurosci.0241-21.2021 fatcat:cz3no5c3sjg3pf7mqot5j34toa

Cortical oscillatory changes in human middle temporal cortex underlying smooth pursuit eye movements

Benjamin T. Dunkley, Tom C.A. Freeman, Suresh D. Muthukumaraswamy, Krish D. Singh
2011 Human Brain Mapping  
Here, we used magnetoencephalography (MEG) to study changes in oscillatory power related to smooth pursuit in extra-striate visual areas under three conditions: 'pursuit' of a small target, 'retinal motion  ...  Broadband alpha-beta suppression (5-25 Hz) was observed over bilateral extra-striate cortex (consistent with middle temporal cortex (MTþ)) during all conditions.  ...  In particular, human neuroimaging studies have mapped the spatial extent of the circuitry involved and have found reliable activation in V1, middle temporal cortex (MTþ), posterior parietal cortex/intraparietal  ... 
doi:10.1002/hbm.21478 pmid:22110021 fatcat:c3epwhhakbdgfieqg5oqzhfnmu

Visual Cortex Plasticity Following Peripheral Damage To The Visual System: fMRI Evidence

João Lemos, Daniela Pereira, Miguel Castelo-Branco
2016 Current Neurology and Neuroscience Reports  
Abnormal fMRI response patterns have been occasionally detected in the visually deprived cortex of patients with bilateral retinal diseases.  ...  There is however accumulating imaging evidence demonstrating trans-synaptic degeneration of the visual cortex in patients with disease of the anterior visual pathways.  ...  foveal BOLD activity may represent abnormal developmental organization Table 2 2 Selected human fMRI studies on visual cortical plasticity following optic nerve lesions Study Condition Number of  ... 
doi:10.1007/s11910-016-0691-0 pmid:27542799 fatcat:omrrvyr6ofatncjrsxeffvkqee
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