scholarly journals Direct evidence for the contribution of the superior colliculus in the control of visually guided reaching movements in the cat

2004 ◽  
Vol 556 (3) ◽  
pp. 675-681 ◽  
Author(s):  
Jean-Hubert Courjon ◽  
Etienne Olivier ◽  
Denis Pélisson
Keyword(s):  
Superior Colliculus ◽  
Direct Evidence ◽  
Reaching Movements ◽  
Visually Guided ◽  
Visually Guided Reaching

scholarly journals Contributions of the PPC to Online Control of Visually Guided Reaching Movements Assessed with fMRI-Guided TMS

2010 ◽  
Vol 21 (7) ◽  
pp. 1602-1612 ◽  
Author(s):  
Alexandra Reichenbach ◽  
Jean-Pierre Bresciani ◽  
Angelika Peer ◽  
Heinrich H. Bülthoff ◽  
Axel Thielscher
Keyword(s):  
Online Control ◽  
Reaching Movements ◽  
Visually Guided ◽  
Visually Guided Reaching

scholarly journals Visually-guided reaching movements in depth: spatial tuning of single cell activity in the in monkey superior parietal area V6A.

2012 ◽  
Vol 12 (9) ◽  
pp. 609-609
Author(s):  
P. Fattori ◽  
K. Hadjidimitrakis ◽  
R. Breveglieri ◽  
F. Bertozzi ◽  
G. Dal Bo' ◽  
...  
Keyword(s):  
Single Cell ◽  
Cell Activity ◽  
Reaching Movements ◽  
Visually Guided ◽  
Visually Guided Reaching ◽  
Parietal Area ◽  
Spatial Tuning ◽  
Single Cell Activity

scholarly journals Transcranial magnetic stimulation and preparation of visually-guided reaching movements

2012 ◽  
Vol 5 ◽  
Author(s):  
Pierpaolo Busan ◽  
Marco Zanon ◽  
Federica Vinciati ◽  
Fabrizio Monti ◽  
Gilberto Pizzolato ◽  
...  
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Magnetic Stimulation ◽  
Reaching Movements ◽  
Visually Guided ◽  
Visually Guided Reaching

Neuronal Activity in the Supplementary Motor Area of Monkeys Adapting to a New Dynamic Environment

2004 ◽  
Vol 91 (1) ◽  
pp. 449-473 ◽  
Author(s):  
Camillo Padoa-Schioppa ◽  
Chiang-Shan Ray Li ◽  
Emilio Bizzi
Keyword(s):  
Neuronal Activity ◽  
Supplementary Motor Area ◽  
Dynamic Environment ◽  
Motor Area ◽  
Reaching Movements ◽  
Visually Guided ◽  
Visually Guided Reaching ◽  
Movement Dynamics ◽  
The Central Nervous System ◽  
Plastic Changes

To execute visually guided reaching movements, the central nervous system (CNS) must transform a desired hand trajectory (kinematics) into appropriate muscle-related commands (dynamics). It has been suggested that the CNS might face this challenging computation by using internal forward models for the dynamics. Previous work in humans found that new internal models can be acquired through experience. In a series of studies in monkeys, we investigated how neurons in the motor areas of the frontal lobe reflect the movement dynamics and how their activity changes when monkeys learn a new internal model. Here we describe the results for the supplementary motor area (SMA-proper, or SMA). In the experiments, monkeys executed visually guided reaching movements and adapted to an external perturbing force field. The experimental design allowed dissociating the neuronal activity related to movement dynamics from that related to movement kinematics. It also allowed dissociating the changes related to motor learning from the activity related to motor performance (kinematics and dynamics). We show that neurons in SMA reflect the movement dynamics individually and as a population, and that their activity undergoes a variety of plastic changes when monkeys adapt to a new dynamic environment.

Application of the GABA antagonist bicuculline to the premotor cortex reduces the ability to withhold reaching movements by well-trained monkeys in visually guided reaching task

1996 ◽  
Vol 75 (5) ◽  
pp. 2150-2156 ◽  
Author(s):  
T. Sawaguchi ◽  
I. Yamane ◽  
K. Kubota
Keyword(s):  
Premotor Cortex ◽  
Reaching Movements ◽  
Neuronal System ◽  
Gamma Aminobutyric Acid ◽  
Visually Guided ◽  
Reaching Task ◽  
Left Hand ◽  
Visually Guided Reaching ◽  
Gaba Antagonist ◽  
The Right

1. A gamma-aminobutyric acid (GABA) antagonist, bicuculline methiodide (BMI, 10 micrograms/microliters, 1 microliter), was locally injected into a total of 32 sites in the right premotor cortex (PM) of two rhesus monkeys that had been well-trained in a visually guided reaching task (VR) for approximately 3 yr. The monkey initiated the task by pressing a central hold lever with its left hand, and this was followed by waiting (1 s), warning (central green square on a computer monitor, 0.5 s), cue (right, upper, or left square), delay (2-5 s), and go (central green square changes to red, < 1.2 s) periods. In the go period, the monkey released the hold lever and reached out to one of three target levers (left, upper, or right) that had been indicated 2-5 s previously in the cue period. 2. At three sites in the dorsal part of the PM, after the local application of BMI, reaching movements of the left forelimb, which were not part of the trained-reaching, occurred 200-300 ms after the onset of a burst of neuronal activity at the BMI injection site. This induced-reaching, which was designated a "forced-reaching" movement, occurred while the monkeys were pressing the hold lever before the cue appeared-i.e., during the waiting or waiting period. No reaching occurred when the burst did not appear. Furthermore, trajectories and electromyograms of the forelimbs during the forced-reaching movements were similar to those in the trained-reaching movements in the VR task. 3. These results suggest that restricted sites in the dorsal PM of monkeys are involved in the initiation and/or execution of trained-reaching movements and that GABAergic inhibition at these sites normally suppresses this initiation/execution unless it is required. By relaxing GABAergic suppression, the dorsal PM might send a command to a neuronal system that is associated with trained reaching to recruit the system, thereby initiating and/or executing the trained reaching.

scholarly journals Visuomotor Map Determines How Visually Guided Reaching Movements are Corrected Within and Across Trials

eNeuro ◽  
2016 ◽  
Vol 3 (3) ◽  
pp. ENEURO.0032-16.2016 ◽  
Author(s):  
Takuji Hayashi ◽  
Atsushi Yokoi ◽  
Masaya Hirashima ◽  
Daichi Nozaki
Keyword(s):  
Reaching Movements ◽  
Visually Guided ◽  
Visually Guided Reaching
Sign in / Sign up

Export Citation Format

Share Document