scholarly journals Cortical Control of Visually Guided Reaching: Evidence from Patients with Optic Ataxia

2005 ◽  
Vol 15 (10) ◽  
pp. 1561-1569 ◽  
Author(s):  
Hans-Otto Karnath ◽  
Marie-Thérèse Perenin
Keyword(s):  
Visually Guided ◽  
Cortical Control ◽  
Optic Ataxia ◽  
Visually Guided Reaching

scholarly journals When Mechanical Computations Explain Better

2021 ◽  
pp. 463-477
Author(s):  
Silvano Zipoli Caiani
Keyword(s):  
Dynamical System ◽  
System Theory ◽  
Environmental Variables ◽  
Epistemic Value ◽  
Dynamical System Theory ◽  
Visually Guided ◽  
Optic Ataxia ◽  
Internal Representations ◽  
Visually Guided Reaching ◽  
Computational Explanation

AbstractIn this paper I defend the epistemic value of the representational-computational view of cognition by arguing that it has explanatory merits that cannot be ignored. To this end, I focus on the virtue of a computational explanation of optic ataxia, a disorder characterized by difficulties in executing visually-guided reaching tasks, although ataxic patients do not exhibit any specific disease of the muscular apparatus. I argue that addressing cases of patients who are suffering from optic ataxia by invoking a causal role for internal representations is more effective than merely relying on correlations between bodily and environmental variables. This argument has consequences for the epistemic assessment of radical enactivism, whichRE invokes the Dynamical System Theory as the best tool for explaining cognitive phenomena.

scholarly journals Decoupled Visually-Guided Reaching in Optic Ataxia: Differences in Motor Control between Canonical and Non-Canonical Orientations in Space

PLoS ONE ◽  
2013 ◽  
Vol 8 (12) ◽  
pp. e86138 ◽  
Author(s):  
Joshua A. Granek ◽  
Laure Pisella ◽  
John Stemberger ◽  
Alain Vighetto ◽  
Yves Rossetti ◽  
...  
Keyword(s):  
Motor Control ◽  
Visually Guided ◽  
Optic Ataxia ◽  
Visually Guided Reaching

Hand kinematics during visually guided reaching in children with deprivation amblyopia

2021 ◽  
Vol 25 (4) ◽  
pp. e20-e21
Author(s):  
Krista R. Kelly ◽  
Reed M. Jost ◽  
Eileen E. Birch ◽  
Serena X. Wang ◽  
Jeffrey Hunter ◽  
...  
Keyword(s):  
Visually Guided ◽  
Visually Guided Reaching ◽  
Hand Kinematics

scholarly journals The role of memory in visually guided reaching

10.1167/7.5.6 ◽  
2007 ◽  
Vol 7 (5) ◽  
pp. 6 ◽  
Author(s):  
Anne-Marie Brouwer ◽  
David C. Knill
Keyword(s):  
Visually Guided ◽  
Visually Guided Reaching

scholarly journals Transcranial Magnetic Stimulation Over the Human Medial Posterior Parietal Cortex Disrupts Depth Encoding During Reach Planning

2020 ◽  
Vol 31 (1) ◽  
pp. 267-280
Author(s):  
Rossella Breveglieri ◽  
Annalisa Bosco ◽  
Sara Borgomaneri ◽  
Alessia Tessari ◽  
Claudio Galletti ◽  
...  
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Parietal Cortex ◽  
Magnetic Stimulation ◽  
Posterior Parietal Cortex ◽  
Critical Role ◽  
The Body ◽  
Visually Guided ◽  
Visually Guided Reaching ◽  
Posterior Parietal

Abstract Accumulating evidence supports the view that the medial part of the posterior parietal cortex (mPPC) is involved in the planning of reaching, but while plenty of studies investigated reaching performed toward different directions, only a few studied different depths. Here, we investigated the causal role of mPPC (putatively, human area V6A–hV6A) in encoding depth and direction of reaching. Specifically, we applied single-pulse transcranial magnetic stimulation (TMS) over the left hV6A at different time points while 15 participants were planning immediate, visually guided reaching by using different eye-hand configurations. We found that TMS delivered over hV6A 200 ms after the Go signal affected the encoding of the depth of reaching by decreasing the accuracy of movements toward targets located farther with respect to the gazed position, but only when they were also far from the body. The effectiveness of both retinotopic (farther with respect to the gaze) and spatial position (far from the body) is in agreement with the presence in the monkey V6A of neurons employing either retinotopic, spatial, or mixed reference frames during reach plan. This work provides the first causal evidence of the critical role of hV6A in the planning of visually guided reaching movements in depth.

Visually guided reaching: bilateral posterior parietal lesions cause a switch from fast visuomotor to slow cognitive control

2005 ◽  
Vol 43 (2) ◽  
pp. 162-177 ◽  
Author(s):  
Y. Rossetti ◽  
P. Revol ◽  
R. McIntosh ◽  
L. Pisella ◽  
G. Rode ◽  
...  
Keyword(s):  
Cognitive Control ◽  
Visually Guided ◽  
Visually Guided Reaching ◽  
Posterior Parietal
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