keyword
MENU ▼
Read by QxMD icon Read
search

Intraparietal

keyword
https://www.readbyqxmd.com/read/28186673/modulation-of-fronto-parietal-connections-during-the-rubber-hand-illusion
#1
Anke Ninija Karabanov, Anina Ritterband-Rosenbaum, Mark Schram Christensen, Hartwig Roman Siebner, Jens Bo Nielsen
Accumulating evidence suggests that parieto-frontal connections play a role in adjusting body ownership during the Rubber Hand Illusion (RHI). Using a motor version of the rubber hand illusion paradigm, we applied single-site and dual-site transcranial magnetic stimulation (TMS) to investigate cortico-spinal and parietal-frontal connectivity during perceived rubber hand ownership. Healthy volunteers received a conditioning TMS pulse over left anterior intraparietal sulcus (aIPS) and a test TMS pulse over left primary motor cortex (M1)...
February 10, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28183861/tool-selection-and-the-ventral-dorsal-organization-of-tool-related-knowledge
#2
Michael J Tobia, Christopher R Madan
Tool selection is a cognitive process necessary for tool use, and may rely on distinct knowledge under different conditions. This fMRI experiment was designed to identify neural substrates mediating tool selection under different conditions. Participants performed a picture-matching task that presented a recipient object and an action-goal, and required the selection of the best tool object from among four candidates. Some trials allowed selection of the prototypical tool, whereas others forced selection of either a functionally substitutable or impossible tool...
February 2017: Physiological Reports
https://www.readbyqxmd.com/read/28159617/a-brief-comparative-review-of-primate-posterior-parietal-cortex-a-novel-hypothesis-on-the-human-toolmaker
#3
S Kastner, Q Chen, S K Jeong, R E B Mruczek
The primate visual system contains two major cortical pathways: a ventral-temporal pathway that has been associated with object processing and recognition, and a dorsal-parietal pathway that has been associated with spatial processing and action guidance. Our understanding of the role of the dorsal pathway, in particular, has greatly evolved within the framework of the two-pathway hypothesis since its original conception. Here, we present a comparative review of the primate dorsal pathway in humans and monkeys based on electrophysiological, neuroimaging, neuropsychological, and neuroanatomical studies...
January 31, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28142026/isolating-response-inhibition-in-the-brain-parietal-versus%C3%A2-frontal-contribution
#4
Tamar Kolodny, Carmel Mevorach, Lilach Shalev
Response inhibition is a main function of cognitive control and its neural substrates have been studied extensively. However, it is still a question whether previous brain imaging investigations were successful in isolating specific response inhibition activation. In the current study we attempted to pinpoint response inhibition in the brain using a Go/No-go task and fMRI, by contrasting rare-No-go trials with prevalent-No-go trials. Although inhibition is required in all No-go trials, task variants with rare-No-go cases (25%) create a prepotent response which elicits a strong demand for inhibition, while task variants with prevalent-No-go cases (75%) require very little inhibition effort...
December 22, 2016: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28131811/activation-of-writing-specific-brain-regions-when-reading-chinese-as-a-second-language-effects-of-training-modality-and-transfer-to-novel-characters
#5
Aurélie Lagarrigue, Marieke Longcamp, Jean Luc Anton, Bruno Nazarian, Laurent Prévot, Jean-Luc Velay, Fan Cao, Cheryl Frenck-Mestre
We examined the implication of training modality on the cortical representation of Chinese words in adult learners of Chinese. In particular, we tested the implication of the neural substrates of writing in a reading task. The brain network sustaining finger writing was defined neuroanatomically based on an independent functional localizer, and brain activations during reading were analysed according to the position of the activation peaks in this localizer. We compared the brain activation elicited by Chinese words learned via writing vs...
January 25, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28129058/a-tms-investigation-on-the-role-of-lateral-occipital-and-caudal-intraparietal-sulcus-in-the-perception-of-object-form-and-orientation
#6
Philippe A Chouinard, Deiter K Meena, Robert L Whitwell, Matthew D Hilchey, Melvyn A Goodale
We used TMS to assess the causal roles of the lateral occipital (LO) and caudal intraparietal sulcus (cIPS) areas in the perceptual discrimination of object features. All participants underwent fMRI to localize these areas using a protocol in which they passively viewed images of objects that varied in both form and orientation. fMRI identified six significant brain regions: LO, cIPS, and the fusiform gyrus, bilaterally. In a separate experimental session, we applied TMS to LO or cIPS while the same participants performed match-to-sample form or orientation discrimination tasks...
January 27, 2017: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/28126618/functional-connectivity-when-detecting-rare-visual-targets-in-schizophrenia
#7
Amy M Jimenez, Junghee Lee, Michael F Green, Jonathan K Wynn
Individuals with schizophrenia demonstrate difficulties in attending to important stimuli (e.g., targets) and ignoring distractors (e.g., non-targets). We used a visual oddball task during fMRI to examine functional connectivity within and between the ventral and dorsal attention networks to determine the relative contribution of each network to detection of rare visual targets in schizophrenia. The sample comprised 25 schizophrenia patients and 27 healthy controls. Psychophysiological interaction analysis was used to examine whole-brain functional connectivity in response to targets...
January 17, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28110447/hemispheric-lateralization-of-resting-state-functional-connectivity-of-the-ventral-striatum-an-exploratory-study
#8
Sheng Zhang, Sien Hu, Herta H Chao, Chiang-Shan R Li
Resting-state functional connectivity (rsFC) is widely used to examine cerebral functional organization. The ventral striatum (VS) is critical to motivated behavior, with extant studies suggesting functional hemispheric asymmetry. The current work investigated differences in rsFC between the left (L) and right (R) VS and explored gender differences in the extent of functional lateralization. In 106 adults, we computed a laterality index (fcLI) to query whether a target region shows greater or less connectivity to the L vs R VS...
January 21, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28108496/connectivity-of-the-cingulate-sulcus-visual-area-csv-in-the-human-cerebral-cortex
#9
Andrew T Smith, Anton L Beer, Michele Furlan, Rogier B Mars
The human cingulate sulcus visual area (CSv) responds selectively to visual and vestibular cues to self-motion. Although it is more selective for visual self-motion cues than any other brain region studied, it is not known whether CSv mediates perception of self-motion. An alternative hypothesis, based on its location, is that it provides sensory information to the motor system for use in guiding locomotion. To evaluate this hypothesis we studied the connectivity pattern of CSv, which is completely unknown, with a combination of diffusion MRI and resting-state functional MRI...
January 19, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28100735/neural-tuning-to-numerosity-relates-to-perceptual-tuning-in-3-6-year-old-children
#10
Alyssa J Kersey, Jessica F Cantlon
: Neural representations of approximate numerical value, or numerosity, have been observed in the intraparietal sulcus (IPS) in monkeys and humans, including children. Using functional magnetic resonance imaging, we show that children as young as 3-4 years old exhibit neural tuning to cardinal numerosities in the IPS and that their neural responses are accounted for by a model of numerosity coding that has been used to explain neural responses in the adult IPS. We also found that the sensitivity of children's neural tuning to number in the right IPS was comparable to their numerical discrimination sensitivity observed behaviorally, outside of the scanner...
January 18, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28087234/interference-from-related-actions-in-spoken-word-production-behavioural-and-fmri-evidence
#11
Greig de Zubicaray, Douglas Fraser, Kori Ramajoo, Katie McMahon
Few investigations of lexical access in spoken word production have investigated the cognitive and neural mechanisms involved in action naming. These are likely to be more complex than the mechanisms involved in object naming, due to the ways in which conceptual features of action words are represented. The present study employed a blocked cyclic naming paradigm to examine whether related action contexts elicit a semantic interference effect akin to that observed with categorically related objects. Participants named pictures of intransitive actions to avoid a confound with object processing...
February 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28076355/multiple-choice-neurodynamical-model-of-the-uncertain-option-task
#12
Andrea Insabato, Mario Pannunzi, Gustavo Deco
The uncertain option task has been recently adopted to investigate the neural systems underlying the decision confidence. Latterly single neurons activity has been recorded in lateral intraparietal cortex of monkeys performing an uncertain option task, where the subject is allowed to opt for a small but sure reward instead of making a risky perceptual decision. We propose a multiple choice model implemented in a discrete attractors network. This model is able to reproduce both behavioral and neurophysiological experimental data and therefore provides support to the numerous perspectives that interpret the uncertain option task as a sensory-motor association...
January 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28069542/hemispheric-asymmetries-in-the-transition-from-action-preparation-to-execution
#13
Valentina Sulpizio, Giuliana Lucci, Marika Berchicci, Gaspare Galati, Sabrina Pitzalis, Francesco Di Russo
Flexible and adaptive behavior requires the ability to contextually stop inappropriate actions and select the right one as quickly as possible. Recently, it has been proposed that three brain regions, i.e., the inferior frontal gyrus (iFg), the anterior insula (aIns), and the anterior intraparietal sulcus (aIPs), play an important role in several processing phases of perceptual decision tasks, especially in the preparation, perception and action phases, respectively. However, little is known about hemispheric differences in the activation of these three areas during the transition from perception to action...
January 6, 2017: NeuroImage
https://www.readbyqxmd.com/read/28038366/brain-networks-underlying-novel-metaphor-production
#14
Roger E Beaty, Paul J Silvia, Mathias Benedek
Metaphors are widely used to convey abstract concepts and emotions in the arts and everyday life. Neuroimaging research suggests that dynamic interactions among large-scale brain networks, including the default and executive control networks, support the production of such creative ideas. However, the extent to which these networks interact to support other forms of creative language production such as metaphor remains unknown. Using functional magnetic resonance imaging (fMRI), we explored this question by assessing functional interactions between brain regions during novel metaphor production...
February 2017: Brain and Cognition
https://www.readbyqxmd.com/read/28034601/the-involvement-of-the-dorsal-stream-in-processing-implied-actions-between-paired-objects-a-tms-study
#15
Shan Xu, Glyn W Humphreys, Carmel Mevorach, Dietmar Heinke
Perceiving and selecting the action possibilities (affordances) provided by objects is an important challenge to human vision, and is not limited to single-object scenarios. Xu et al. (2015) identified two effects of implied actions between paired objects on response selection: an inhibitory effect on responses aligned with the passive object in the pair (e.g. a bowl) and an advantage associated with responses aligned with the active objects (e.g. a spoon). The present study investigated the neurocognitive mechanisms behind these effects by examining the involvement of the ventral (vision for perception) and the dorsal (vision for action) visual streams, as defined in Goodale and Milner's (1992) two visual stream theory...
December 27, 2016: Neuropsychologia
https://www.readbyqxmd.com/read/28029706/morphological-brain-measures-of-cortico-limbic-inhibition-related-to-resilience
#16
Arpana Gupta, Aubrey Love, Lisa A Kilpatrick, Jennifer S Labus, Ravi Bhatt, Lin Chang, Kirsten Tillisch, Bruce Naliboff, Emeran A Mayer
Resilience is the ability to adequately adapt and respond to homeostatic perturbations. Although resilience has been associated with positive health outcomes, the neuro-biological basis of resilience is poorly understood. The aim of the study was to identify associations between regional brain morphology and trait resilience with a focus on resilience-related morphological differences in brain regions involved in cortico-limbic inhibition. The relationship between resilience and measures of affect were also investigated...
December 28, 2016: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/28025017/automatic-numerical-spatial-association-in-synaesthesia-an-fmri-investigation
#17
Isabel Arend, Sarit Ashkenazi, Kenneth Yuen, Shiran Ofir, Avishai Henik
A horizontal mental number line (MNL) is used to describe how quantities are represented across space. In humans, the neural correlates associated with such a representation are found in different areas of the posterior parietal cortex, especially, the intraparietal sulcus (IPS). In a phenomenon known as number-space synaesthesia, individuals visualise numbers in specific spatial locations. The experience of a MNL for number-space synaesthetes is explicit, idiosyncratic, and highly stable over time. It remains an open question whether the mechanisms underlying numerical-spatial association are shared by synaesthetes and nonsynaesthetes...
December 23, 2016: Neuropsychologia
https://www.readbyqxmd.com/read/28017920/common-and-distinct-brain-regions-processing-multisensory-bodily-signals-for-peripersonal-space-and-body-ownership
#18
Petr Grivaz, Olaf Blanke, Andrea Serino
We take the feeling that our body belongs to us for granted. However, recent research has shown that it is possible to alter the subjective sensation of body ownership (BO) by manipulating multisensory bodily inputs. Several frontal and parietal regions are known to specifically process multisensory cues presented close to the body, i.e., within the peripersonal space (PPS). It has been proposed that these PPS fronto-parietal regions also underlie BO. However, most previous studies investigated the brain mechanisms of either BO or of PPS processing separately and by using a variety of paradigms...
February 15, 2017: NeuroImage
https://www.readbyqxmd.com/read/27999536/cortical-asymmetries-during-hand-laterality-task-vary-with-hand-laterality-a-fmri-study-in-295-participants
#19
Emmanuel Mellet, Bernard Mazoyer, Gaelle Leroux, Marc Joliot, Nathalie Tzourio-Mazoyer
The aim of this study was to characterize, using fMRI, the functional asymmetries of hand laterality task (HLT) in a sample of 295 participants balanced for handedness. During HLT, participants have to decide whether the displayed picture of a hand represent a right or a left hand. Pictures of hands' back view were presented for 150 ms in the right or left hemifield. At the whole hemisphere level, we evidenced that the laterality of the hand and of the hemifield in which the picture was displayed combined their effects on the hemispheric asymmetry in an additive way...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27989463/coupling-between-one-dimensional-networks-reconciles-conflicting-dynamics-in-lip-and-reveals-its-recurrent-circuitry
#20
Wujie Zhang, Annegret L Falkner, B Suresh Krishna, Michael E Goldberg, Kenneth D Miller
Little is known about the internal circuitry of the primate lateral intraparietal area (LIP). During two versions of a delayed-saccade task, we found radically different network dynamics beneath similar population average firing patterns. When neurons are not influenced by stimuli outside their receptive fields (RFs), dynamics of the high-dimensional LIP network during slowly varying activity lie predominantly in one multi-neuronal dimension, as described previously. However, when activity is suppressed by stimuli outside the RF, slow LIP dynamics markedly deviate from a single dimension...
January 4, 2017: Neuron
keyword
keyword
79821
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"