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Drop Search Results: 187

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·qalerts.app·May 20, 2024

Drop Search Results: 187

A study-specific fMRI normalization approach that operates directly on high resolution functional EPI data at 7 Tesla - PubMed

A study-specific fMRI normalization approach that operates directly on high resolution functional EPI data at 7 Tesla - PubMed

Due to the availability of ultra-high field scanners and novel imaging methods, high resolution, whole brain functional MR imaging (fMRI) has become increasingly feasible. However, it is common to use extensive spatial smoothing to account for inter-subject anatomical variation when pooling over sub …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

A study-specific fMRI normalization approach that operates directly on high resolution functional EPI data at 7 Tesla - PubMed

Online maintenance of sensory and motor representations: effects on corticospinal excitability - PubMed

Online maintenance of sensory and motor representations: effects on corticospinal excitability - PubMed

Flexible behavior requires the ability to delay a response until it is appropriate. This can be achieved by holding either a sensory or a motor representation online. Here we assess whether maintenance of sensory or motor material drives the motor system to different functional states, as indexed by …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Online maintenance of sensory and motor representations: effects on corticospinal excitability - PubMed

Genetic load on amygdala hypofunction during sadness in nonaffected brothers of schizophrenia patients - PubMed

Genetic load on amygdala hypofunction during sadness in nonaffected brothers of schizophrenia patients - PubMed

Following induction of sad mood, both patients with schizophrenia and their nonaffected brothers displayed reduced brain activity in the amygdala. Such hypoactivity is likely to represent a genetic influence and indicates that efficient compensatory mechanisms capable of preventing the onset of the …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Genetic load on amygdala hypofunction during sadness in nonaffected brothers of schizophrenia patients - PubMed

Interactions between posterior gamma and frontal alpha/beta oscillations during imagined actions - PubMed

Interactions between posterior gamma and frontal alpha/beta oscillations during imagined actions - PubMed

Several studies have revealed that posterior parietal and frontal regions support planning of hand movements but far less is known about how these cortical regions interact during the mental simulation of a movement. Here, we have used magnetoencephalography (MEG) to investigate oscillatory interact …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Interactions between posterior gamma and frontal alpha/beta oscillations during imagined actions - PubMed

Inability to directly detect magnetic field changes associated with neuronal activity - PubMed

Inability to directly detect magnetic field changes associated with neuronal activity - PubMed

The ability to directly detect neuronal magnetic fields by MRI would help investigators achieve the "holy grail" of neuroimaging, namely both high spatial and temporal resolution. Both positive and negative findings have been reported in the literature, with no clear consensus as to the feasibility …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Inability to directly detect magnetic field changes associated with neuronal activity - PubMed

Movement preparation and working memory: a behavioural dissociation - PubMed

Movement preparation and working memory: a behavioural dissociation - PubMed

We can cross temporal sensorimotor contingencies by remembering sensory events or by anticipating motor responses. Here we tested the hypothesis that sensory and motor representations can be accessed according to different temporal dynamics. We predicted that the manipulation of movement representat …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Movement preparation and working memory: a behavioural dissociation - PubMed

Repetition suppression dissociates spatial frames of reference in human saccade generation - PubMed

Repetition suppression dissociates spatial frames of reference in human saccade generation - PubMed

The path from perception to action involves the transfer of information across various reference frames. Here we applied a functional magnetic resonance imaging (fMRI) repetition suppression paradigm to determine the reference frame(s) in which the cortical activity is coded at several phases of the …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Repetition suppression dissociates spatial frames of reference in human saccade generation - PubMed

Sources of variability in human communicative skills - PubMed

Sources of variability in human communicative skills - PubMed

When established communication systems cannot be used, people rapidly create novel systems to modify the mental state of another agent according to their intentions. However, there are dramatic inter-individual differences in the implementation of this human competence for communicative innovation. …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Sources of variability in human communicative skills - PubMed

Increase in prefrontal cortical volume following cognitive behavioural therapy in patients with chronic fatigue syndrome - PubMed

Increase in prefrontal cortical volume following cognitive behavioural therapy in patients with chronic fatigue syndrome - PubMed

Chronic fatigue syndrome (CFS) is a disabling disorder, characterized by persistent or relapsing fatigue. Recent studies have detected a decrease in cortical grey matter volume in patients with CFS, but it is unclear whether this cerebral atrophy constitutes a cause or a consequence of the disease. …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Increase in prefrontal cortical volume following cognitive behavioural therapy in patients with chronic fatigue syndrome - PubMed

Cerebral changes during performance of overlearned arbitrary visuomotor associations - PubMed

Cerebral changes during performance of overlearned arbitrary visuomotor associations - PubMed

The posterior parietal cortex (PPC) is known to be involved in the control of automatic movements that are spatially guided, such as grasping an apple. We considered whether the PPC might also contribute to the performance of visuomotor associations in which stimuli and responses are linked arbitrar …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Cerebral changes during performance of overlearned arbitrary visuomotor associations - PubMed

Neural substrates of olfactory processing in schizophrenia patients and their healthy relatives - PubMed

Neural substrates of olfactory processing in schizophrenia patients and their healthy relatives - PubMed

Odorants represent powerful stimuli capable of eliciting various emotional responses. In schizophrenia patients and their non-affected relatives, olfactory and emotional functions are impaired, revealing a familial influence on these deficits. We aimed at determining the neural basis of emotional ol …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Neural substrates of olfactory processing in schizophrenia patients and their healthy relatives - PubMed

Neural correlates of the chronic fatigue syndrome--an fMRI study - PubMed

Neural correlates of the chronic fatigue syndrome--an fMRI study - PubMed

Chronic fatigue syndrome (CFS) is characterized by a debilitating fatigue of unknown aetiology. Patients who suffer from CFS report a variety of physical complaints as well as neuropsychological complaints. Therefore, it is conceivable that the CNS plays a role in the pathophysiology of CFS. The pur …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Neural correlates of the chronic fatigue syndrome--an fMRI study - PubMed

Cerebral coherence between communicators marks the emergence of meaning - PubMed

Cerebral coherence between communicators marks the emergence of meaning - PubMed

How can we understand each other during communicative interactions? An influential suggestion holds that communicators are primed by each other's behaviors, with associative mechanisms automatically coordinating the production of communicative signals and the comprehension of their meanings. An alte …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Cerebral coherence between communicators marks the emergence of meaning - PubMed

The role of immediate and final goals in action planning: an fMRI study - PubMed

The role of immediate and final goals in action planning: an fMRI study - PubMed

To interact effectively with our environment, we need to specify the intended outcomes (goals) of our actions. In this process, immediate goals and final goals can be regarded as different levels within a hierarchically organized system for action planning: immediate goals and movement details are s …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

The role of immediate and final goals in action planning: an fMRI study - PubMed

Communicating without a functioning language system: implications for the role of language in mentalizing - PubMed

Communicating without a functioning language system: implications for the role of language in mentalizing - PubMed

A debated issue in the relationship between language and thought is how our linguistic abilities are involved in understanding the intentions of others ('mentalizing'). The results of both theoretical and empirical work have been used to argue that linguistic, and more specifically, grammatical, abi …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Communicating without a functioning language system: implications for the role of language in mentalizing - PubMed

Investigating neural mechanisms of change of cognitive behavioural therapy for chronic fatigue syndrome: a randomized controlled trial - PubMed

Investigating neural mechanisms of change of cognitive behavioural therapy for chronic fatigue syndrome: a randomized controlled trial - PubMed

Dutch Trial Register #15852. Registered 9 December 2013 ( http://www.trialregister.nl/trialreg/admin/rctview.asp?TC=4311 ).

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Investigating neural mechanisms of change of cognitive behavioural therapy for chronic fatigue syndrome: a randomized controlled trial - PubMed

NA-CONTROL: a study protocol for a randomised controlled trial to compare specific outpatient rehabilitation that targets cerebral mechanisms through relearning motor control and uses self-management strategies to improve functional capability of the upper extremity, to usual care in patients with neuralgic amyotrophy - PubMed

NA-CONTROL: a study protocol for a randomised controlled trial to compare specific outpatient rehabilitation that targets cerebral mechanisms through relearning motor control and uses self-management strategies to improve functional capability of the upper extremity, to usual care in patients with neuralgic amyotrophy - PubMed

ClinicalTrials.gov, NCT03441347 . Registered on 20 February 2018.

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

NA-CONTROL: a study protocol for a randomised controlled trial to compare specific outpatient rehabilitation that targets cerebral mechanisms through relearning motor control and uses self-management strategies to improve functional capability of the upper extremity, to usual care in patients with neuralgic amyotrophy - PubMed

Increased dependence of action selection on recent motor history in Parkinson's disease - PubMed

Increased dependence of action selection on recent motor history in Parkinson's disease - PubMed

It is well known that the basal ganglia are involved in switching between movement sequences. Here we test the hypothesis that this contribution is an instance of a more general role of the basal ganglia in selecting actions that deviate from the context defined by the recent motor history, even whe …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Increased dependence of action selection on recent motor history in Parkinson's disease - PubMed

Cerebral pathological and compensatory mechanisms in the premotor phase of leucine-rich repeat kinase 2 parkinsonism - PubMed

Cerebral pathological and compensatory mechanisms in the premotor phase of leucine-rich repeat kinase 2 parkinsonism - PubMed

Compensatory cerebral mechanisms can delay motor symptom onset in Parkinson's disease. We aim to characterize these compensatory mechanisms and early disease-related changes by quantifying movement-related cerebral function in subjects at significantly increased risk of developing Parkinson's diseas …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Cerebral pathological and compensatory mechanisms in the premotor phase of leucine-rich repeat kinase 2 parkinsonism - PubMed

Connectivity-based subdivisions of the human right "temporoparietal junction area": evidence for different areas participating in different cortical networks - PubMed

Connectivity-based subdivisions of the human right "temporoparietal junction area": evidence for different areas participating in different cortical networks - PubMed

Controversy surrounds the role of the temporoparietal junction (TPJ) area of the human brain. Although TPJ has been implicated both in reorienting of attention and social cognition, it is still unclear whether these functions have the same neural basis. Indeed, whether TPJ is a precisely identifiabl …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Connectivity-based subdivisions of the human right "temporoparietal junction area": evidence for different areas participating in different cortical networks - PubMed

Neural dynamics of error processing in medial frontal cortex - PubMed

Neural dynamics of error processing in medial frontal cortex - PubMed

Adaptive behavior requires an organism to evaluate the outcome of its actions, such that future behavior can be adjusted accordingly and the appropriate response selected. During associative learning, the time at which such evaluative information is available changes as learning progresses, from the …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Neural dynamics of error processing in medial frontal cortex - PubMed

Gray matter volume reduction in the chronic fatigue syndrome - PubMed

Gray matter volume reduction in the chronic fatigue syndrome - PubMed

The chronic fatigue syndrome (CFS) is a disabling disorder of unknown etiology. The symptomatology of CFS (central fatigue, impaired concentration, attention and memory) suggests that this disorder could be related to alterations at the level of the central nervous system. In this study, we have use …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Gray matter volume reduction in the chronic fatigue syndrome - PubMed

Movement-specific repetition suppression in ventral and dorsal premotor cortex during action observation - PubMed

Movement-specific repetition suppression in ventral and dorsal premotor cortex during action observation - PubMed

There are several models of premotor cortex contributions to sensorimotor behavior. For instance, the ventral premotor cortex (PMv) appears to be involved in processing visuospatial object properties for grasping, whereas the dorsal premotor cortex (PMd) is involved in using arbitrary rules to guide …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Movement-specific repetition suppression in ventral and dorsal premotor cortex during action observation - PubMed

Understanding effector selectivity in human posterior parietal cortex by combining information patterns and activation measures - PubMed

Understanding effector selectivity in human posterior parietal cortex by combining information patterns and activation measures - PubMed

The posterior parietal cortex (PPC) has traditionally been viewed as containing separate regions for the planning of eye and limb movements, but recent neurophysiological and neuroimaging observations show that the degree of effector specificity is limited. This has led to the hypothesis that effect …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Understanding effector selectivity in human posterior parietal cortex by combining information patterns and activation measures - PubMed

Different brains process numbers differently: structural bases of individual differences in spatial and nonspatial number representations - PubMed

Different brains process numbers differently: structural bases of individual differences in spatial and nonspatial number representations - PubMed

A dominant hypothesis on how the brain processes numerical size proposes a spatial representation of numbers as positions on a "mental number line." An alternative hypothesis considers numbers as elements of a generalized representation of sensorimotor-related magnitude, which is not obligatorily sp …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Different brains process numbers differently: structural bases of individual differences in spatial and nonspatial number representations - PubMed

Changes of cortico-striatal effective connectivity during visuomotor learning - PubMed

Changes of cortico-striatal effective connectivity during visuomotor learning - PubMed

It has been suggested that the cortico-striatal system might play a crucial role in learning behavioural plans of action. We have tested this hypothesis by studying the dynamics of functional coupling among the neural elements of cortico-striatal circuitry. Human cerebral activity was measured with …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Changes of cortico-striatal effective connectivity during visuomotor learning - PubMed

Neural topography and content of movement representations - PubMed

Neural topography and content of movement representations - PubMed

We have used implicit motor imagery to investigate the neural correlates of motor planning independently from actual movements. Subjects were presented with drawings of left or right hands and asked to judge the hand laterality, regardless of the stimulus rotation from its upright orientation. We pa …

·pubmed.ncbi.nlm.nih.gov·Oct 11, 2023

Neural topography and content of movement representations - PubMed