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Parietal Lobe

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41. Posterior parietal cortex evaluates visuoproprioceptive congruence based on brief visual information Full Text available with Trip Pro

, emphasizing the posterior parietal cortex (PPC) in early multisensory comparison and integration. Here, we used functional magnetic resonance imaging (fMRI) and a virtual reality-based setup to briefly (0.5 s) present healthy human participants photorealistic virtual hands, of matching or nonmatching anatomical side, or objects at the same or a different location than their real hidden left or right hand. The inferior parietal lobe (IPL) of the left PPC showed a significant preference for congruent (...) Posterior parietal cortex evaluates visuoproprioceptive congruence based on brief visual information To represent one's upper limbs for action, the brain relies on a combined position estimate based on visual and proprioceptive information. Monkey neurophysiology and human brain imaging suggest that the underlying operations are implemented in a network of fronto-parietal and occipitotemporal cortical areas. Recently, a potential hierarchical arrangement of these areas has been proposed

2017 Scientific reports

42. A brief comparative review of primate posterior parietal cortex: a novel hypothesis on the human toolmaker Full Text available with Trip Pro

ways, including the development of a dorsal object vision system mirroring the complexity of the ventral stream, the integration of object information with parietal working memory systems, and the emergence of tool-specific object representations in the anterior intraparietal sulcus and regions of the inferior parietal lobe. We propose that these evolutionary changes have enabled the emergence of human-specific behaviors, such as the sophisticated use of tools.Copyright © 2017 Elsevier Ltd. All (...) A brief comparative review of primate posterior parietal cortex: a novel hypothesis on the human toolmaker 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

2017 Neuropsychologia

43. White matter connections of the inferior parietal lobule: A study of surgical anatomy Full Text available with Trip Pro

association fibers connect the supramarginal and angular gyri, and connect both of these gyri to the superior parietal lobule. (2) Fiber bundles from the IPL connect to the frontal lobe by joining the superior longitudinal fasciculus near the termination of the Sylvian fissure. (3) Fiber bundles from the IPL connect to the temporal lobe by joining the middle longitudinal fasciculus just inferior to the margin of the superior temporal sulcus.We present a summary of the relevant anatomy of the IPL as part (...) White matter connections of the inferior parietal lobule: A study of surgical anatomy Interest in the function of the inferior parietal lobule (IPL) has resulted in increased understanding of its involvement in visuospatial and cognitive functioning, and its role in semantic networks. A basic understanding of the nuanced white-matter anatomy in this region may be useful in improving outcomes when operating in this region of the brain. We sought to derive the surgical relationship between

2017 Brain and behavior

44. Anaplastic Meningioma Presenting as a Left Parietal Mass: A Case Report Full Text available with Trip Pro

female patient who presented with forgetfulness, unsteady gait, right-sided motor weakness, and dysphagia. She was found to have an anaplastic meningioma located in the left parietal lobe that was treated by surgical resection. The patient had an uneventful postoperative course, and was stable at later follow-ups. CONCLUSIONS This case report describes the clinical presentation, pathological findings, and the prognosis of this mass, which is atypical in this location, and has been rarely reported (...) Anaplastic Meningioma Presenting as a Left Parietal Mass: A Case Report BACKGROUND Meningiomas are slow-growing tumors attached to the dura mater and are composed of neoplastic meningothelial cells. The tumors are most commonly located in convexities, and it is relatively rare to find such a growth in the parietal region such as the one presented in this case report. CASE REPORT Because of its uncommon presentation, we hereby report the case of a 67-year-old, previously healthy, white Lebanese

2017 The American journal of case reports

45. Mapping Temporo-parietal and Temporo-occipital Cortico-cortical Connections of the Human Middle Longitudinal Fascicle in Subject-Specific, Probabilistic, and Stereotaxic Talairach Spaces Full Text available with Trip Pro

of the superior temporal gyrus and dorsal temporal pole with the parietal and occipital lobes. Despite its location and size, which makes MdLF one of the most prominent cerebral association fiber tracts, its discovery in humans is recent. Given the absence of a gold standard in humans for this fiber tract, its precise and complete connectivity remains to be determined with certainty. In this study using high angular resolution diffusion MRI (HARDI), we delineated for the first time, six major fiber (...) temporal gyrus and temporal pole with the parietal and occipital lobes, MdLF may be involved in several neurological and psychiatric conditions such as primary progressive aphasia and other aphasic syndromes, some forms of behavioral variant of frontotemporal dementia, atypical forms of Alzheimer's disease, corticobasal degeneration, schizophrenia as well as attention-deficit/hyperactivity Disorder and neglect disorders.

2017 Brain imaging and behavior

46. Posterior parietal cortex contains a command apparatus for hand movements Full Text available with Trip Pro

Posterior parietal cortex contains a command apparatus for hand movements Mountcastle and colleagues proposed that the posterior parietal cortex contains a "command apparatus" for the operation of the hand in immediate extrapersonal space [Mountcastle et al. (1975) J Neurophysiol 38(4):871-908]. Here we provide three lines of converging evidence that a lateral region within area 5 has corticospinal neurons that are directly linked to the control of hand movements. First, electrical stimulation (...) in a lateral region of area 5 evokes finger and wrist movements. Second, corticospinal neurons in the same region of area 5 terminate at spinal locations that contain last-order interneurons that innervate hand motoneurons. Third, this lateral region of area 5 contains many neurons that make disynaptic connections with hand motoneurons. The disynaptic input to motoneurons from this portion of area 5 is as direct and prominent as that from any of the premotor areas in the frontal lobe. Thus, our results

2017 Proceedings of the National Academy of Sciences of the United States of America

47. Language, Paleoneurology, and the Fronto-Parietal System Full Text available with Trip Pro

Language, Paleoneurology, and the Fronto-Parietal System 28713257 2019 01 13 1662-5161 11 2017 Frontiers in human neuroscience Front Hum Neurosci Language, Paleoneurology, and the Fronto-Parietal System. 349 10.3389/fnhum.2017.00349 Bruner Emiliano E Programa de Paleobiología, Centro Nacional de Investigación sobre la Evolución HumanaBurgos, Spain. eng Journal Article 2017 06 30 Switzerland Front Hum Neurosci 101477954 1662-5161 embodiment frontal lobes functional craniology parietal lobes

2017 Frontiers in human neuroscience

48. Abnormal parietal encephalomalacia associated with schizophrenia: A case report. Full Text available with Trip Pro

Abnormal parietal encephalomalacia associated with schizophrenia: A case report. It is widely believed that structural abnormalities of the brain contribute to the pathophysiology of schizophrenia. The parietal lobe is a central hub of multisensory integration, and abnormities in this region might account for the clinical features of schizophrenia. However, few cases of parietal encephalomalacia associated with schizophrenia have been described.In this paper, we present a case of a 25-year-old (...) schizophrenia patient with abnormal parietal encephalomalacia. The patient had poor nutrition and frequently had upper respiratory infections during childhood and adolescence. She showed severe schizophrenic symptoms such as visual hallucinations for 2 years. After examining all her possible medical conditions, we found that the patient had a lesion consistent with the diagnosis of encephalomalacia in her right parietal lobe and slight brain atrophy.The patient was prescribed olanzapine (10 mg per day).Her

2017 Medicine

49. Correlation of neuropsychological and metabolic changes after epilepsy surgery in patients with left mesial temporal lobe epilepsy with hippocampal sclerosis Full Text available with Trip Pro

in the left mesial temporal regions and occipital lobe. Increased metabolism was observed in the bi-frontal and right parietal lobes, temporal lobes, occipital lobes, thalamus, cerebellum, and vermis. In these regions, we did not find a correlation between changes in metabolism and neuropsychological test scores. A significant negative correlation, however, was found between metabolic changes in the precuneus and Boston Naming Test (BNT) scores.There are significant metabolic decreases in the left mesial (...) temporal regions and increases in the bi-frontal lobes; right parietal, temporal, and occipital lobes; right thalamus; cerebellum; and vermis in patients with left MTLE-HS who were rendered seizure-free after epilepsy surgery. We could not confirm that these changes translate into significant cognitive changes. A significant negative correlation was found between changes in confrontation naming and changes in metabolism in the precuneus. We speculate that the precuneus may play a compensatory role

2018 EJNMMI research

50. Early bilateral and massive compromise of the frontal lobes Full Text available with Trip Pro

Early bilateral and massive compromise of the frontal lobes The frontal lobes are one of the most complex brain structures involved in both domain-general and specific functions. The goal of this work was to assess the anatomical and cognitive affectations from a unique case with massive bilateral frontal affectation. We report the case of GC, an eight-year old child with nearly complete affectation of bilateral frontal structures and spared temporal, parietal, occipital, and cerebellar regions (...) . We performed behavioral, neuropsychological, and imaging (MRI, DTI, fMRI) evaluations. Neurological and neuropsychological examinations revealed a mixed pattern of affected (executive control/abstraction capacity) and considerably preserved (consciousness, language, memory, spatial orientation, and socio-emotional) functions. Both structural (DTI) and functional (fMRI) connectivity evidenced abnormal anterior connections of the amygdala and parietal networks. In addition, brain structural

2018 NeuroImage : Clinical

51. Decreased functional connectivity and structural deficit in alertness network with right-sided temporal lobe epilepsy. Full Text available with Trip Pro

, no differences were noted in the alertness effect between the 2 groups. The patient group had lower FC compared with the control group in the right inferior parietal lobe (IPL), amygdala, and insula. Structural deficits were found in the right parahippocampal gyrus, superior temporal pole, insula, and amygdala in the patient group compared with the control group. Also significantly negative correlations were observed between abnormal fractional anisotropy (between the right insula and the superior temporal (...) Decreased functional connectivity and structural deficit in alertness network with right-sided temporal lobe epilepsy. Patients with temporal lobe epilepsy (TLE) often suffer from alertness alterations. However, specific regions connected with alertness remain controversial, and whether these regions have structural impairment is also elusive. This study aimed to investigate the characteristics and neural mechanisms underlying the functions and structures of alertness network in patients

2018 Medicine

52. On the impact of interhemispheric white matter: Age, executive functioning, and dedifferentiation in the frontal lobes. Full Text available with Trip Pro

On the impact of interhemispheric white matter: Age, executive functioning, and dedifferentiation in the frontal lobes. In middle age, declines in executive functioning (EF) are associated with decrements in the quality and/or quantity of white and grey matter. Recruitment of homologous regions has been identified as a compensatory mechanism for cognitive decline in later middle age; however, research into neural substrates of EF has yet to be guided by dedifferentiation models. We hypothesized (...) that frontal-parietal grey matter volume, interhemispheric white matter, and intrahemispheric white matter fractional anisotropy will be predictive of EF. Further, we hypothesized that the comparative association between interhemispheric white matter and EF will increase with age, because of compensatory recruitment.Neurocognitive test data, DTI, and T1 MPRAGE scans (n = 444) were obtained from the NKI-Rockland Sample. Structural equation modeling was used to examine the relationship between age, EF

2018 International Journal of Geriatric Psychiatry

53. Transfer of cognitive training across magnitude dimensions achieved with concurrent brain stimulation of the parietal lobe. Full Text available with Trip Pro

Transfer of cognitive training across magnitude dimensions achieved with concurrent brain stimulation of the parietal lobe. Improvement in performance following cognitive training is known to be further enhanced when coupled with brain stimulation. Here we ask whether training-induced changes can be maintained long term and, crucially, whether they can extend to other related but untrained skills. We trained overall 40 human participants on a simple and well established paradigm assessing (...) the ability to discriminate numerosity--or the number of items in a set--which is thought to rely on an "approximate number sense" (ANS) associated with parietal lobes. We coupled training with parietal stimulation in the form of transcranial random noise stimulation (tRNS), a noninvasive technique that modulates neural activity. This yielded significantly better and longer lasting improvement (up to 16 weeks post-training) of the precision of the ANS compared with cognitive training in absence

2013 The Journal of neuroscience : the official journal of the Society for Neuroscience Controlled trial quality: uncertain

54. Dysfunctional role of parietal lobe during self-face recognition in schizophrenia. (Abstract)

Dysfunctional role of parietal lobe during self-face recognition in schizophrenia. Anomalous sense of self is central to schizophrenia yet difficult to demonstrate empirically. The present study examined the effective neural network connectivity underlying self-face recognition in patients with schizophrenia (SZ) using [15O]H2O Positron Emission Tomography (PET) and Structural Equation Modeling.Eight SZ and eight age-matched healthy controls (CO) underwent six consecutive [15O]H2O PET scans

2013 Schizophrenia Research

55. Mystery Case: Hemiballism in a patient with parietal lobe infarction. Full Text available with Trip Pro

Mystery Case: Hemiballism in a patient with parietal lobe infarction. A 60-year-old man with a history of atrial fibrillation had an acute onset of ballistic movements of the left limbs with sensory extinction (video on the Neurology® Web site at www.neurology.org). The patient was treated with risperidone and anticoagulant; symptoms subsided 3 days later. Brain MRI showed acute infarction of the right posterior parietal lobe (figure 1) and SPECT revealed hypoperfusion in the right

2013 Neurology

56. Parietal Lobe

Parietal Lobe Parietal Lobe Toggle navigation Brain Head & Neck Chest Endocrine Abdomen Musculoskeletal Skin Infectious Disease Hematology & Oncology Cohorts Diagnostics Emergency Findings Procedures Prevention & Management Pharmacy Resuscitation Trauma Emergency Procedures Ultrasound Cardiovascular Emergencies Lung Emergencies Infectious Disease Pediatrics Neurologic Emergencies Skin Exposure Miscellaneous Abuse Cancer Administration 4 Parietal Lobe Parietal Lobe Aka: Parietal Lobe , Parietal (...) Lobe Function , Cerebral Parietal Lobe , Homunculus II. Physiology: Homunculus Homunculus is a graphical representation of sensory and motor control Man standing at the midline between the two s Legs are above the falx cerebri at the medial Parietal Lobe ( ) Legs are relatively small compared to arms and head Represents fewer overall s dedicated to leg motor and sensory control Man is bending at the waist over the top of the Parietal Lobe Legs and head extend over the lateral Parietal Lobe ( ) Arms

2015 FP Notebook

57. Cortical infarction of the right parietal lobe and neurogenic heart disease: A report of three cases Full Text available with Trip Pro

Cortical infarction of the right parietal lobe and neurogenic heart disease: A report of three cases Three male patients were diagnosed with new cortical infarctions of the right parietal lobe on the basis of head magnetic resonance imaging; high-intensity signals indicating lesions in the right parietal lobe were noted on diffusion-weighted images at admission. Two of them presented with left hand weakness, and one exhibited left upper limb weakness. Treatment for improving blood supply (...) easily causes tachyarrhythmia and sudden death. Our experimental findings indicate that close electrocardiograph monitoring and cerebral infarction treatment should be standard procedures to predict and help prevent heart disease in patients with cerebral infarction in the right parietal lobe and left upper limb weakness as the main complaint.

2012 Neural Regeneration Research

58. Metabolic Hyperactivity of the Medial Posterior Parietal Lobes in Psychogenic Tremor Full Text available with Trip Pro

Metabolic Hyperactivity of the Medial Posterior Parietal Lobes in Psychogenic Tremor The pathophysiology of psychogenic movement disorders, including psychogenic tremor (PT), is only emerging.This is a single case report of a patient who met diagnostic criteria for PT. He underwent positron emission tomography (PET) of brain with 18F-deoxyglucose at resting state. His PET study showed symmetrically increased 18F-deoxyglucose uptake in both posterior medial parietal lobes (...) . There was no corresponding abnormality on structural imaging.Hypermetabolism of the medial aspects of posterior parietal lobes bilaterally may reflect abnormal activity of sensory integration that is important in the pathogenesis of PT. This further supports the idea that non-organic movement disorders may be associated with detectable functional brain abnormalities.

2012 Tremor and Other Hyperkinetic Movements

59. The role of left superior parietal lobe in male sexual behavior: dynamics of distinct components revealed by FMRI. (Abstract)

The role of left superior parietal lobe in male sexual behavior: dynamics of distinct components revealed by FMRI. Despite the interest for the brain correlates of male sexual arousal, few studies investigated neural mechanisms underlying psychogenic erectile dysfunction (ED). Although these studies showed several brain regions active in ED patients during visual erotic stimulation, the dynamics of inhibition of sexual response is still unclear.This study investigated the dynamics of brain (...) stimuli, a larger activation was observed for the patient group in the left superior parietal lobe, ventromedial prefrontal cortex, and posterior cingulate cortex, whereas the control group showed larger activation in the right middle insula and dorsal anterior cingulate cortex and hippocampus. Moreover, the left superior parietal lobe showed a larger activation in patients than controls especially during the later stage of sexual response.Our results suggest that, among regions more active in patient

2012 Journal Of Sexual Medicine

60. Emotion unfolded by motion: a role for parietal lobe in decoding dynamic facial expressions Full Text available with Trip Pro

Emotion unfolded by motion: a role for parietal lobe in decoding dynamic facial expressions Facial expressions convey important emotional and social information and are frequently applied in investigations of human affective processing. Dynamic faces may provide higher ecological validity to examine perceptual and cognitive processing of facial expressions. Higher order processing of emotional faces was addressed by varying the task and virtual face models systematically. Blood oxygenation (...) activation of inferior parietal lobule, which highlights the involvement of parietal areas in processing of high level features of faces. Dynamic emotional stimuli may help to emphasize functions of the hypothesized 'extended' over the 'core' system for face processing.

2012 Social cognitive and affective neuroscience

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