Results 61 to 70 of about 107,978 (189)
The Motor System at the heart of Decision-Making and Action Execution [PDF]
arXiv, 2023 In this Habilitation Thesis, I synthesize 10 years of work on the role of the motor system in sensorimotor decision-making. First, a large part of the work we initially performed (2014-2020) questioned the functional role of the motor system in the integration of so-called decision variables such as the reward associated with different actions, the ...
arxiv
Cell and neuron densities in the primary motor cortex of primates [PDF]
Frontiers in Neural Circuits, 2013 Cell and neuron densities vary across the cortical sheet in a predictable manner across different primate species (Collins et al., 2010b). Primary motor cortex, M1, is characterized by lower neuron densities relative to other cortical areas. M1 contains a motor representation map of contralateral body parts from tail to tongue in a mediolateral ...
Nicole A. Young +2 more
openaire +4 more sources
Research on Event-Related Desynchronization of Motor Imagery and Movement Based on Localized EEG Cortical Sources [PDF]
This study investigates event-related desynchronization (ERD) phenomena during motor imagery and actual movement. Using sLORETA software, we analyzed the cortical current source density distributions in Mu and Beta frequency bands for 33 subjects during rest, motor imagery, and actual movement conditions. The results were normalized for analysis. Using
arxiv +1 more source
The Functional Properties of Barrel Cortex Neurons Projecting to the Primary Motor Cortex [PDF]
The Journal of Neuroscience, 2010 Nearby neurons, sharing the same locations within the mouse whisker map, can have dramatically distinct response properties. To understand the significance of this diversity, we studied the relationship between the responses of individual neurons and their projection targets in the mouse barrel cortex. Neurons projecting to primary motor cortex (MI) or
Takashi R. Sato, Karel Svoboda
openaire +2 more sources
Detecting neural activity and connectivity by perfusion-based fMRI [PDF]
arXiv, 2017 This study proposes an approach to estimate the functional localization and connectivity from CBF and BOLD signals simultaneously measured by ASL (arterial spin labeling) MRI, especially using exploratory Structural Equation Modeling analysis. In a visual task experiment, the primary visual cortices were located by analyzing the perfusion data.
arxiv
A sub-Riemannian model of the functional architecture of M1 for arm movement direction [PDF]
arXiv, 2023 In this paper we propose a neurogeometrical model of the behaviour of cells of the arm area of the primary motor cortex (M1). We mathematically express the hypercolumnar organization of M1 discovered by Georgopoulos, as a fiber bundle, as in classical sub-riemannian models of the visual cortex (Hoffmann, Petitot, Citti-Sarti).
arxiv
American Journal of Physical Medicine & Rehabilitation, 2002 The object of this study was to verify motor cortex reorganization in patients with primary motor cortex injury using functional magnetic resonance imaging.Ten control subjects and two patients with primary motor cortex injury, caused by a traumatic brain injury in patient 1 and meningioma in patient 2, were evaluated.
Sung Ho Jang +5 more
openaire +4 more sources
Detecting Resting-state Neural Connectivity Using Dynamic Network Analysis on Multiband fMRI Data [PDF]
arXiv, 2017 This paper describes an approach of using dynamic Structural Equation Modeling (SEM) analysis to estimate the connectivity networks from resting-state fMRI data measured by a multiband EPI sequence. Two structural equation models were estimated at each voxel with respect to the sensory-motor network and default-mode network.
arxiv
What is the functional relevance of reorganization in primary motor cortex after spinal cord injury?
Neurobiology of Disease, 2019 Motor output maps within primary motor cortex are widely distributed and modified by motor skill learning and neurological injury. Functions that these maps represent after spinal cord injury remain debatable.
M.A. Urbin +4 more
doaj
How transcranial direct current stimulation facilitates post-stroke rehabilitation [PDF]
arXiv, 2019 Whether transcranial direct current stimulation (tDCS) benefits stroke rehabilitation remains unclear. To investigate how tDCS reorganizes brain circuitry, nineteen post-stroke patients underwent rehabilitation sessions with bi-hemispheric real vs sham tDCS intervention. Resting motor threshold measurements showed tDCS evoked higher excitability in the
arxiv