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Ascending vestibular pathways to parietal areas MIP and LIPv and efference copy inputs from the medial reticular formation: Functional frameworks for body representations updating and online movement guidance.
Eur J Neurosci
September 2019
Department of Physiology and Biophysics, Howard University, Washington, District of Columbia.
The posterior parietal cortex (PPC) serves as a sensorimotor interface by integrating multisensory signals with motor related information for generating and updating body representations and movement plans. Using retrograde transneuronal transfer of rabies virus combined with a conventional tracer, we identified direct and polysynaptic pathways to two PPC areas, the rostral medial intraparietal area (MIP) and the ventral part of the lateral intraparietal area (LIPv) in macaque monkeys. We found that rostral MIP and LIPv receive ascending vestibular pathways, and putative efference copy inputs disynaptically from the medullary medial reticular formation (MRF) where reticulospinal pathways to neck and arm motoneurons originate.
View Article and Find Full Text PDFEpigenetics in Ascending Thoracic Aortic Aneurysm and Dissection.
Aorta (Stamford)
February 2018
Cardiovascular Research Unit, Luxembourg Institute of Health, Luxembourg, Luxembourg.
Thoracic aortic aneurysm (TAA) is an asymptomatic and progressive dilatation of the thoracic aorta. Ascending aortic dissection (AAD) is an acute intraparietal tear, occurring or not on a pre-existing dilatation. AAD is a condition associated with a poor prognosis and a high mortality rate.
View Article and Find Full Text PDFNumerical ordering and symbolic arithmetic share frontal and parietal circuits in the right hemisphere.
Neuroimage
January 2014
Department of Psychology, Humboldt University, Berlin, Germany; Section Neuropsychology, Neurological Clinic, University Hospital Aachen, Germany; Interdisciplinary Centre for Clinical Research within the Faculty of Medicine at the RWTH Aachen University, Germany. Electronic address:
A prominent proposal in numerical cognition states that our mental calculation abilities are grounded in the approximate number system (ANS). Recently, it was proposed that this association is mediated by numerical ordering abilities. As a first step in elucidating the neural correlates of this link this study tested which areas in the human brain carry information common to both calculation and numerical ordering.
View Article and Find Full Text PDFPosterior parietal cortex areas MIP and LIPv receive eye position and velocity inputs via ascending preposito-thalamo-cortical pathways.
Eur J Neurosci
September 2009
Laboratoire de Neurobiologie Cellulaire et Moléculaire (NBCM), UPR9040 CNRS, 91198 Gif sur Yvette, France.
Neuronal activity encoding eye position and gaze signals participates in updating the spatial representations found in the posterior parietal cortex and is necessary for spatial accuracy in goal-directed movements. Using retrograde transneuronal transfer of rabies virus in combination with a conventional tracer, we studied direct and polysynaptic inputs to the ventral lateral intraparietal area (LIPv) and medial intraparietal area (MIP) in non-human primates, to identify possible sources of eye position and gaze signals. We found that these areas receive disynaptic inputs from the brainstem horizontal eye position integrator network (nucleus prepositus hypoglossi, PH) via the central lateral and ventral lateral thalamic nuclei.
View Article and Find Full Text PDFTo interact with our dynamic environment, the brain merges motion information from auditory and visual senses. However, not only "natural" auditory MOTION, but also "metaphoric" de/ascending PITCH and SPEECH (e.g.
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