On-line control of rapid aiming movements: Unexpected target perturbations and movement kinematics.

1998 ◽  
Vol 52 (4) ◽  
pp. 163-173 ◽  
Author(s):  
Matthew Heath ◽  
Nicola J. Hodges ◽  
Romeo Chua ◽  
Digby Elliott
Keyword(s):  
Movement Kinematics ◽  
Aiming Movements ◽  
On Line ◽  
Rapid Aiming Movements

On-Line versus Off-Line Control of Rapid Aiming Movements

1993 ◽  
Vol 25 (4) ◽  
pp. 275-279 ◽  
Author(s):  
Jean Blouin ◽  
C. Bard ◽  
N. Teasdale ◽  
M. Fleury
Keyword(s):  
Aiming Movements ◽  
On Line ◽  
Rapid Aiming Movements

Distribution of Programming in a Rapid Aimed Sequential Movement

1996 ◽  
Vol 49 (2) ◽  
pp. 379-397 ◽  
Author(s):  
A.L. Smiley-Oyen ◽  
C.J. Worringham
Keyword(s):  
Target Sequence ◽  
Spatial Accuracy ◽  
Movement Kinematics ◽  
Mean Velocity ◽  
Task Constraints ◽  
Aiming Movements ◽  
Hit Rate ◽  
On Line ◽  
Complex Sequences ◽  
Sequential Aiming

Studies indicate that rapid sequential movements are preprogrammed and that preprogramming increases with complexity, but more complex sequences that require on-line programming have seldom been studied. The purpose of this investigation was to determine whether on-line programming occurs in a 7-target sequence in which there is a unique target constraint and if so, to determine how different task constraints affect the distribution of additional programming. Subjects contacted seven targets with a hand-held stylus as quickly as possible while maintaining a 90% hit rate. Initiation- and execution-timing patterns and movement kinematics were measured to determine when the additional programming took place. Results indicated that additional programming occurred before initiation and during movement to the first target when the constraint required more spatial accuracy (small target). A different type of unique target (a triple hit of one target) caused the additional programming to occur on-line one or two segments before its execution. Different positions of the unique target also affected timing patterns. Results were discussed in terms of: (1) capacity of processing; (2) control of movement variance; and (3) mean velocity as a programmed parameter in sequential aiming movements.

Programming strategies for rapid aiming movements under simple and choice reaction time conditions

2006 ◽  
Vol 59 (3) ◽  
pp. 524-542 ◽  
Author(s):  
Michael A. Khan ◽  
Gavin P. Lawrence ◽  
Eric Buckolz ◽  
Ian M. Franks
Keyword(s):  
Reaction Time ◽  
Choice Reaction Time ◽  
Aiming Movements ◽  
Rapid Aiming Movements

Separate Sources of Spatial Information for Distance and Location in Rapid Aiming Movements

Motor Control ◽  
2002 ◽  
Vol 6 (1) ◽  
pp. 84-103 ◽  
Author(s):  
Michael A. Khan ◽  
Trevor Hale ◽  
Michael I. Carry ◽  
Ian M. Franks
Keyword(s):  
Spatial Information ◽  
Aiming Movements ◽  
Rapid Aiming Movements

The Processing Speed of Visual and Verbal Movement Information by Adults with and Without Down Syndrome

2001 ◽  
Vol 18 (2) ◽  
pp. 156-167 ◽  
Author(s):  
Timothy N. Welsh ◽  
Digby Elliott
Keyword(s):  
Down Syndrome ◽  
Developmental Disabilities ◽  
Processing Speed ◽  
Target Location ◽  
Reaction Times ◽  
Visual Cue ◽  
Aiming Movements ◽  
Rapid Aiming Movements ◽  
Visual Conditions

Previous research has indicated that individuals with Down syndrome (DS) have difficulties processing auditory movement information relative to their peers with undifferentiated developmental disabilities. The present study was conducted to assess whether a model of atypical cerebral specialization could explain these findings. Thirteen adults with Down syndrome (8 men, 5 women), 14 adults with undifferentiated developmental disabilities (7 men, 7 women), and 14 adults without disabilities (8 men, 6 women) performed rapid aiming movements to targets under three conditions: a visual cue at the target location, a visual cue remote from the target location, or a verbal cue. Results revealed that, while the reaction times did not differ between the two groups with disabilities across conditions, the participants with DS, unlike their peers, had significantly longer movement times in the verbal than in two visual conditions. These results are consistent with the model of biological dissociation.

The effect of target size and inertial load on the control of rapid aiming movements

1999 ◽  
Vol 124 (2) ◽  
pp. 151-158 ◽  
Author(s):  
Michael A. Khan ◽  
Michael I. Garry ◽  
I. M. Franks
Keyword(s):  
Target Size ◽  
Inertial Load ◽  
Aiming Movements ◽  
Rapid Aiming Movements
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