keyword
MENU ▼
Read by QxMD icon Read
search

parietal cortex

keyword
https://www.readbyqxmd.com/read/29777819/7-tesla-magnetic-resonance-imaging-of-caudal-anterior-cingulate-and-posterior-cingulate-cortex-atrophy-in-patients-with-trigeminal-neuralgia
#1
Hyeong Cheol Moon, Chan-A Park, Yeong-Jae Jeon, Soon Tae You, Hyun Man Baek, Youn Joo Lee, Chul Beom Cho, Chae Joon Cheong, Young Seok Park
The cingulate cortex (CC) is a brain region that plays a key role in pain processing, but CC abnormalities are not unclear in patients with trigeminal neuralgia (TN). The purpose of this study was to determine the central causal mechanisms of TN and the surrounding brain structure in healthy controls and patients with TN using 7 Tesla (T) magnetic resonance imaging (MRI). Whole-brain parcellation in gray matter volume and thickness was assessed in 15 patients with TN and 16 healthy controls matched for sex, age, and regional variability using T1-weighted imaging...
May 16, 2018: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29774500/thalamocortical-dysconnectivity-in-premenstrual-syndrome
#2
Peng Liu, Ying Wei, Hai Liao, Yingying Fan, Ru Li, Nana Feng, Gaoxiong Duan, Demao Deng, Wei Qin
Premenstrual syndrome (PMS) is a menstrual cycle-related disorder. Although the precise pathophysiology is not fully understood, it is increasingly believed that the central nervous system plays a vital role in the development of PMS. The aim of this study is to elucidate specific functional connectivity between the thalamus and cerebral cortex. Resting-state functional magnetic resonance imaging (fMRI) data were obtained from 20 PMS patients and 21 healthy controls (HCs). Seed-based functional connectivity between the thalamus and six cortical regions of interest, including the prefrontal cortex (PFC), posterior parietal cortex, somatosensory cortex, motor cortex/supplementary motor area, temporal and occipital lobe, was adopted to identify specific thalamocortical connectivity in the two groups...
May 17, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29773908/non-predictive-online-spatial-coding-in-the-posterior-parietal-cortex-when-aiming-ahead-for-catching
#3
Sinéad A Reid, Joost C Dessing
Catching movements must be aimed ahead of the moving ball, which may require predictions of when and where to catch. Here, using repetitive Transcranial Magnetic Stimulation we show for the first time that the Superior Parietal Occipital Cortex (SPOC) displays non-predictive online spatial coding at the moment the interception movements were already aimed at the predicted final target position. The ability to aim ahead for catching must thus arise downstream within the parietofrontal network for reaching.
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29773806/sensory-representation-of-an-auditory-cued-tactile-stimulus-in-the-posterior-parietal-cortex-of-the-mouse
#4
Hemanth Mohan, Yasir Gallero-Salas, Stefano Carta, João Sacramento, Balazs Laurenczy, Lazar T Sumanovski, Christiaan P J de Kock, Fritjof Helmchen, Shankar Sachidhanandam
Sensory association cortices receive diverse inputs with their role in representing and integrating multi-sensory content remaining unclear. Here we examined the neuronal correlates of an auditory-tactile stimulus sequence in the posterior parietal cortex (PPC) using 2-photon calcium imaging in awake mice. We find that neuronal subpopulations in layer 2/3 of PPC reliably represent texture-touch events, in addition to auditory cues that presage the incoming tactile stimulus. Notably, altering the flow of sensory events through omission of the cued texture touch elicited large responses in a subset of neurons hardly responsive to or even inhibited by the tactile stimuli...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29773755/expectations-do-not-alter-early-sensory-processing-during-perceptual-decision-making
#5
Nuttida Rungratsameetaweemana, Sirawaj Itthipuripat, Annalisa Salazar, John T Serences
Two factors play an important role in shaping perception: the allocation of selective attention to behaviorally relevant sensory features, and prior expectations about regularities in the environment. Signal detection theory proposes distinct roles of attention and expectation on decision-making such that attention modulates early sensory processing whereas expectation influences the selection and execution of motor responses. Challenging this classic framework, recent studies suggest that expectations about sensory regularities enhance the encoding and accumulation of sensory evidence during decision-making...
May 17, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29772219/differential-roles-of-polar-orbital-prefrontal-cortex-and-parietal-lobes-in-logical-reasoning-with-neutral-and-negative-emotional-content
#6
Iveta Eimontaite, Vinod Goel, Vanessa Raymont, Frank Krueger, Igor Schindler, Jordan Grafman
To answer the question of how brain pathology affects reasoning about negative emotional content, we administered a disjunctive logical reasoning task involving arguments with neutral content (e.g. Either there are tigers or women in NYC, but not both; There are no tigers in NYC; There are women in NYC) and emotionally laden content (e.g. Either there are pedophiles or politicians in Texas, but not both; There are politicians in Texas; There are no pedophiles in Texas) to 92 neurological patients with focal lesions to various parts of the brain...
May 14, 2018: Neuropsychologia
https://www.readbyqxmd.com/read/29771286/local-cortical-gyrification-is-increased-in-children-with-autism-spectrum-disorders-but-decreases-rapidly-in-adolescents
#7
Jiwandeep S Kohli, Mikaela K Kinnear, Christopher H Fong, Inna Fishman, Ruth A Carper, Ralph-Axel Müller
Extensive MRI evidence indicates early brain overgrowth in autism spectrum disorders (ASDs). Local gyrification may reflect the distribution and timing of aberrant cortical expansion in ASDs. We examined MRI data from (Study 1) 64 individuals with ASD and 64 typically developing (TD) controls (7-19 years), and from (Study 2) an independent sample from the Autism Brain Imaging Data Exchange (n = 31/group). Local Gyrification Index (lGI), cortical thickness (CT), and surface area (SA) were measured. In Study 1, differences in lGI (ASD > TD) were found in left parietal and temporal and right frontal and temporal regions...
May 16, 2018: Cerebral Cortex
https://www.readbyqxmd.com/read/29769646/long-term-impacts-of-prenatal-synthetic-glucocorticoids-exposure-on-functional-brain-correlates-of-cognitive-monitoring-in-adolescence
#8
Liesa Ilg, Manousos Klados, Nina Alexander, Clemens Kirschbaum, Shu-Chen Li
The fetus is highly responsive to the level of glucocorticoids in the gestational environment. Perturbing glucocorticoids during fetal development could yield long-term consequences. Extending prior research about effects of prenatally exposed synthetic glucocorticoids (sGC) on brain structural development during childhood, we investigated functional brain correlates of cognitive conflict monitoring in term-born adolescents, who were prenatally exposed to sGC. Relative to the comparison group, behavioral response consistency (indexed by lower reaction time variability) and a brain correlate of conflict monitoring (the N2 event-related potential) were reduced in the sGC exposed group...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29768682/vestibulo-cortical-hemispheric-dominance-the-link-between-anxiety-and-the-vestibular-system
#9
Nadja F Bednarczuk, Marta Casanovas Ortega, Anne-Sophie Fluri, Qadeer Arshad
Vestibular processing and anxiety networks are functionally intertwined, as demonstrated by reports of reciprocal influences upon each other. Yet whether there is an underlying link between these two systems remains unknown Previous findings have highlighted the involvement of hemispheric lateralisation in processing of both anxiety and vestibular signals. Accordingly, we explored the interaction between vestibular cortical processing and anxiety by assessing the relationship between anxiety levels and the degree of hemispheric lateralisation of vestibulo-cortical processing in 64 right-handed, healthy individuals...
May 16, 2018: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29762090/alzheimer-disease-and-mild-cognitive-impairment-integrated-pulsed-arterial-spin-labeling-mri-and-18-f-fdg-pet
#10
Isabelle Riederer, Karl Peter Bohn, Christine Preibisch, Eva Wiedemann, Claus Zimmer, Panagiotis Alexopoulos, Stefan Förster
Purpose To compare PET/MR hypoperfusion and hypometabolism in patients with Alzheimer disease (AD) and mild cognitive impairment (MCI) compared with healthy control (HC) participants. Materials and Methods Maps of cerebral blood flow (CBF; pulsed arterial spin-labeling [ASL] MRI), glucose metabolism (fluorine 18 [18 F] fluorodeoxyglucose [FDG] PET), and gray matter (GM) volume (structural T1-weighted MRI) were calculated from integrated PET/MR data in 45 patients with AD (mean age, 69 years ± 9 [standard deviation]; age range, 51-89 years), 20 patients with MCI (mean age, 64 years ± 10; age range, 45-82 years), and 11 HC participants (mean age, 65 years ± 8; age range, 54-80 years) between 2011 and 2014...
May 15, 2018: Radiology
https://www.readbyqxmd.com/read/29760183/neural-mechanisms-underlying-individual-differences-in-control-averse-behavior
#11
Sarah Rudorf, Katrin Schmelz, Thomas Baumgartner, Roland Wiest, Urs Fischbacher, Daria Knoch
When another person tries to control one's decisions, some people might comply, but many will feel the urge to act against that control. This control aversion can lead to suboptimal decisions and it affects social interactions in many societal domains. To date, however, it has been unclear what drives individual differences in control-averse behavior. Here, we address this issue by measuring brain activity with fMRI while healthy female and male human participants make choices that are either free or controlled by another person, with real consequences to both interaction partners...
May 14, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29753310/roles-of-the-right-temporo-parietal-and-premotor-cortices-in-self-location-and-body-ownership
#12
Silvia Convento, Daniele Romano, Angelo Maravita, Nadia Bolognini
In the rubber hand illusion (RHI), the feeling that a fake hand belongs to oneself can be induced by the simultaneous, congruent touch of the fake visible hand and one's own hidden hand. This condition is also associated with a recalibration of the perceived location of the real hand. A cortical network, including premotor and temporo-parietal areas, has been proposed as the basis of the RHI. However, the causal contribution of these areas to the discrete illusory components remains unclear. We used transcranial direct current stimulation (tDCS) to assess the contribution of the right premotor cortex (rPMc) and the right temporo-parietal junction (rTPJ) to the RHI and explored the role of these areas in modulating the subjective experience of embodiment and the misperception of the hand position...
May 12, 2018: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29753107/the-neural-basis-of-free-language-choice-in-bilingual-speakers-disentangling-language-choice-and-language-execution
#13
Carlo Reverberi, Anna K Kuhlen, Shima Seyed-Allaei, R Stefan Greulich, Albert Costa, Jubin Abutalebi, John-Dylan Haynes
For everyday communication bilingual speakers need to face the complex task of rapidly choosing the most appropriate language given the context, maintaining this choice over the current communicative act, and shielding lexical selection from competing alternatives from non-target languages. Yet, speech production of bilinguals is typically flawless and fluent. Most of the studies available to date constrain speakers' language choice by cueing the target language and conflate language choice with language use...
May 9, 2018: NeuroImage
https://www.readbyqxmd.com/read/29753019/psychophysical-and-neuroimaging-responses-to-moving-stimuli-in-a-patient-with-the-riddoch-phenomenon-due-to-bilateral-visual-cortex-lesions
#14
Michael J Arcaro, Lore Thaler, Derek J Quinlan, Simona Monaco, Sarah Khan, Kenneth F Valyear, Rainer Goebel, Gordon N Dutton, Melvyn A Goodale, Sabine Kastner, Jody C Culham
Patients with injury to early visual cortex or its inputs can display the Riddoch phenomenon: preserved awareness for moving but not stationary stimuli. We provide a detailed case report of a patient with the Riddoch phenomenon, MC. MC has extensive bilateral lesions to occipitotemporal cortex that include most early visual cortex and complete blindness in visual field perimetry testing with static targets. Nevertheless, she shows a remarkably robust preserved ability to perceive motion, enabling her to navigate through cluttered environments and perform actions like catching moving balls...
May 9, 2018: Neuropsychologia
https://www.readbyqxmd.com/read/29752588/a-lateral-to-mesial-organization-of-human-ventral-visual-cortex-at-birth
#15
P Barttfeld, S Abboud, H Lagercrantz, U Adén, N Padilla, A D Edwards, L Cohen, M Sigman, S Dehaene, G Dehaene-Lambertz
In human adults, ventral extra-striate visual cortex contains a mosaic of functionally specialized areas, some responding preferentially to natural visual categories such as faces (fusiform face area) or places (parahippocampal place area) and others to cultural inventions such as written words and numbers (visual word form and number form areas). It has been hypothesized that this mosaic arises from innate biases in cortico-cortical connectivity. We tested this hypothesis by examining functional resting-state correlation at birth using fMRI data from full-term human newborns...
May 11, 2018: Brain Structure & Function
https://www.readbyqxmd.com/read/29752216/primary-and-secondary-variants-of-psychopathy-in-a-volunteer-sample-are-associated-with-different-neurocognitive-mechanisms
#16
Arjun Sethi, Eamon McCrory, Vanessa Puetz, Ferdinand Hoffmann, Annchen R Knodt, Spenser R Radtke, Bartholomew D Brigidi, Ahmad R Hariri, Essi Viding
BACKGROUND: Recent work has indicated that there at least two distinct subtypes of psychopathy. Primary psychopathy is characterized by low anxiety and thought to result from a genetic predisposition, whereas secondary psychopathy is characterized by high anxiety and thought to develop in response to environmental adversity. Primary psychopathy is robustly associated with reduced neural activation to others' emotions and, in particular, distress. However, it has been proposed that the secondary presentation has different neurocognitive correlates...
April 12, 2018: Biological Psychiatry: Cognitive Neuroscience and Neuroimaging
https://www.readbyqxmd.com/read/29751110/electroencephalographic-predictors-of-neuropathic-pain-in-subacute-spinal-cord-injury
#17
Aleksandra Vuckovic, Mohammed Jajrees, Mariel Purcell, Helen Berry, Matthew Fraser
It is widely believed that cortical changes are a consequence of long standing neuropathic pain (NP). In this paper we demonstrate that NP in people with subacute spinal cord injury (SCI) has characteristic electroencephalographic (EEG) markers which precede the onset of pain. EEG was recorded in a relaxed state and during motor imagination tasks in 10 able bodied participants and 31 subacute SCI participants (11 with NP, 10 without NP and 10 who developed pain within 6 months of EEG recording). All 20 SCI participants initially without NP were tested for mechanically induced allodynia but only one person, who later developed pain, reported an unpleasant sensation...
May 8, 2018: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/29751017/differential-contributions-of-cortical-thickness-and-surface-area-to-trait-impulsivity-in-healthy-young-adults
#18
Katharina M Kubera, Mike M Schmitgen, Klaus H Maier-Hein, Philipp A Thomann, Dusan Hirjak, Robert C Wolf
BACKGROUND: Impulsivity is an essential human personality trait and highly relevant for the development of several mental disorders. There is evidence that impulsivity is heritable, yet little is known about neural correlates reflecting early brain development. Here, we address the question whether motor, attentional and non-planning components, as reflected by the Barratt Impulsiveness Scale (BIS-11), are distinctly associated with cortical thickness and surface area variations in young healthy individuals...
May 8, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29750732/the-patchy-tremor-landscape-recent-advances-in-pathophysiology
#19
Freek Nieuwhof, Pattamon Panyakaew, Bart P van de Warrenburg, Cecile Gallea, Rick C Helmich
PURPOSE OF REVIEW: We focus on new insights in the pathophysiology of Parkinson's disease tremor, essential tremor, tremor in dystonia, and orthostatic tremor. RECENT FINDINGS: Neuroimaging findings suggest that Parkinson's disease resting tremor is associated with dopaminergic dysfunction, serotonergic dysfunction, or both. Not all tremors in Parkinson's disease have the same pathophysiology: postural tremor in Parkinson's disease can be subdivided into pure postural tremor, which involves nondopaminergic mechanisms, and re-emergent tremor, which has a dopaminergic basis...
May 9, 2018: Current Opinion in Neurology
https://www.readbyqxmd.com/read/29750263/independent-early-and-late-sensory-processes-for-proprioceptive-integration-when-planning-a-step
#20
Anahid H Saradjian, Normand Teasdale, Jean Blouin, Laurence Mouchnino
Somatosensory inputs to the cortex undergo an early and a later stage of processing which are characterized by an early and a late somatosensory evoked potentials (SEP). The early response is highly representative of the stimulus characteristics whereas the late response reflects a more integrative, task specific, stage of sensory processing. We hypothesized that the later processing stage is independent of the early processing stage. We tested the prediction that a reduction of the first volley of input to the cortex should not prevent the increase of the late SEP...
May 10, 2018: Cerebral Cortex
keyword
keyword
49756
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"