scholarly journals On your mark, get set: Brainstem circuitry underlying saccadic initiation

2000 ◽  
Vol 78 (11) ◽  
pp. 934-944 ◽  
Author(s):  
D P Munoz ◽  
M C Dorris ◽  
M Paré ◽  
S Everling
Keyword(s):  
Motor Control ◽  
Visual Field ◽  
Superior Colliculus ◽  
Reticular Formation ◽  
Motor Preparation ◽  
Motor Behaviour ◽  
Visual Axis ◽  
Brainstem Reticular Formation ◽  
Behavioural Performance ◽  
Situational Experience

Saccades are rapid eye movements that are used to move the visual axis toward targets of interest in the visual field. The time to initiate a saccade is dependent upon many factors. Here we review some of the recent advances in our understanding of the these processes in primates. Neurons in the superior colliculus and brainstem reticular formation are organised into a network to control saccades. Some neurons are active during visual fixation, while others are active during the preparation and execution of saccades. Several factors can influence the excitability levels of these neurons prior to the appearance of a new saccadic target. These pre-target changes in excitability are correlated to subsequent changes in behavioural performance. Our results show how neuronal signals in the superior colliculus and brainstem reticular formation can be shaped by contextual factors and demonstrate how situational experience can expedite motor behaviour via the advanced preparation of motor programs.Key words: superior colliculus, reticular formation, eye movement, saccade, motor preparation, motor control.

scholarly journals A test of spatial temporal decoding mechanisms in the superior colliculus

2012 ◽  
Vol 107 (9) ◽  
pp. 2442-2452 ◽  
Author(s):  
Husam A. Katnani ◽  
A. J. Van Opstal ◽  
Neeraj J. Gandhi
Keyword(s):  
Nervous System ◽  
Motor Control ◽  
Eye Movements ◽  
Superior Colliculus ◽  
Motor Behavior ◽  
Saccadic Eye Movements ◽  
Population Coding ◽  
Population Activity ◽  
Low Levels

Population coding is a ubiquitous principle in the nervous system for the proper control of motor behavior. A significant amount of research is dedicated to studying population activity in the superior colliculus (SC) to investigate the motor control of saccadic eye movements. Vector summation with saturation (VSS) has been proposed as a mechanism for how population activity in the SC can be decoded to generate saccades. Interestingly, the model produces different predictions when decoding two simultaneous populations at high vs. low levels of activity. We tested these predictions by generating two simultaneous populations in the SC with high or low levels of dual microstimulation. We also combined varying levels of stimulation with visually induced activity. We found that our results did not perfectly conform to the predictions of the VSS scheme and conclude that the simplest implementation of the model is incomplete. We propose that additional parameters to the model might account for the results of this investigation.

Role of Wakefulness Area in the Brainstem Reticular Formation in Regulating Rapid Eye Movement Sleep

2006 ◽  
pp. 36-42
Author(s):  
Birendra N. Mallick ◽  
Satvinder Kaur ◽  
Stephen Thankachan ◽  
Dinesh Pal
Keyword(s):  
Eye Movement ◽  
Reticular Formation ◽  
Rapid Eye Movement ◽  
Rapid Eye Movement Sleep ◽  
Brainstem Reticular Formation

Kinaesthesis: Its Measurement, Training and Relationship to Motor Control

1983 ◽  
Vol 35 (2) ◽  
pp. 411-421 ◽  
Author(s):  
J. I. Laszlo ◽  
P. J. Bairstow
Keyword(s):  
Motor Control ◽  
Individual Differences ◽  
Motor Skills ◽  
Age Groups ◽  
Large Individual ◽  
Motor Behaviour ◽  
Perceptual Training ◽  
Developmental Trends ◽  
And Performance ◽  
Improved Accuracy

This paper reviews studies which demonstrate the importance of kinaesthesis in the acquisition and performance of motor skills. A method of measuring kinaesthetic sensitivity in children and adults (recently developed) is briefly described. Developmental trends in kinaesthetic perception are discussed and large individual differences found within age groups. It was shown that kinaesthetically undeveloped children can be trained to perceive and memorize kinaesthetic information with greatly improved accuracy. Furthermore perceptual training facilitates the performance of a drawing skill. On the basis of these results an argument is made for the importance of kinaesthesis in skilled motor behaviour.

Representation of the visual field in the superior colliculus of the grey squirrel (Sciurus carolinensis) and the tree shrew (Tupaia glis)

1971 ◽  
Vol 26 (2) ◽  
pp. 277-292 ◽  
Author(s):  
Ronald H. Lane ◽  
John M. Allman ◽  
Jon H. Kaas
Keyword(s):  
Visual Field ◽  
Superior Colliculus ◽  
Tree Shrew ◽  
Sciurus Carolinensis ◽  
Grey Squirrel ◽  
Tupaia Glis

The Brainstem Reticular Formation and the Monoamine System

2003 ◽  
pp. 251-264
Author(s):  
Harold H. Traurig
Keyword(s):  
Reticular Formation ◽  
Brainstem Reticular Formation

The Brainstem Reticular Formation and the Monoamine System

2003 ◽  
pp. 251-263
Author(s):  
Harold H. Traurig ◽  
Gregory Cooper ◽  
Robert L. Rodnitzky
Keyword(s):  
Reticular Formation ◽  
Brainstem Reticular Formation

P03. Saccadic eye movement abnormalities in children with type 3 Gaucher disease are indicative for brainstem reticular formation pathology

2007 ◽  
Vol 118 (12) ◽  
pp. 2816-2817
Author(s):  
L. Bour ◽  
J. Cox-Brinkman ◽  
M. Biegstraaten ◽  
A. Fleur van Rootselaar
Keyword(s):  
Eye Movement ◽  
Reticular Formation ◽  
Gaucher Disease ◽  
Saccadic Eye Movement ◽  
Brainstem Reticular Formation ◽  
Type 3

Coma associated with flaccidity produced by fluid-percussion concussion in the cat. I: Is it due to depression of activity within the brainstem reticular formation?

Brain Injury ◽  
1988 ◽  
Vol 2 (1) ◽  
pp. 31-49 ◽  
Author(s):  
Ronald L. Hayes ◽  
Yoichi Katayama ◽  
Harold F. Young ◽  
Jana G. Dunbar
Keyword(s):  
Reticular Formation ◽  
Brainstem Reticular Formation ◽  
Fluid Percussion
Sign in / Sign up

Export Citation Format

Share Document