scholarly journals Detection of the intention to grasp during reach movements

2018 ◽  
Vol 5 ◽  
pp. 205566831775285 ◽  
Author(s):  
JC de Vries ◽  
AL van Ommeren ◽  
GP Prange-Lasonder ◽  
JS Rietman ◽  
PH Veltink
Keyword(s):  
Reach Movements

Biodynamic Characteristics of Upper Limb Reaching Movements of the Seated Human Under Whole-Body Vibration

2013 ◽  
Vol 29 (1) ◽  
pp. 12-22 ◽  
Author(s):  
Heon-Jeong Kim ◽  
Bernard J. Martin
Keyword(s):  
Right Hemisphere ◽  
Whole Body Vibration ◽  
The Body ◽  
Upper Body ◽  
Whole Body ◽  
Vibration Transmission ◽  
Body Vibration ◽  
Body Segments ◽  
Human Movements ◽  
Reach Movements

Simulation of human movements is an essential component for proactive ergonomic analysis and biomechanical model development (Chaffin, 2001). Most studies on reach kinematics have described human movements in a static environment, however the models derived from these studies cannot be applied to the analysis of human reach movements in vibratory environments such as in-vehicle operations. This study analyzes three-dimensional joint kinematics of the upper extremity in reach movements performed in static and specific vibratory conditions and investigates vibration transmission to shoulder, elbow, and hand along the body path during pointing tasks. Thirteen seated subjects performed reach movements to five target directions distributed in their right hemisphere. The results show similarities in the characteristics of movement patterns and reach trajectories of upper body segments for static and dynamic environments. In addition, vibration transmission through upper body segments is affected by vibration frequency, direction, and location of the target to be reached. Similarities in the pattern of movement trajectories revealed by filtering vibration-induced oscillations indicate that coordination strategy may not be drastically different in static and vibratory environments. This finding may facilitate the development of active biodynamic models to predict human performance and behavior under whole body vibration exposure.

Neuronal activity in the superior colliculus related to saccade initiation during coordinated gaze-reach movements

2011 ◽  
Vol 34 (12) ◽  
pp. 1966-1982 ◽  
Author(s):  
Vicente Reyes-Puerta ◽  
Roland Philipp ◽  
Werner Lindner ◽  
Klaus-Peter Hoffmann
Keyword(s):  
Superior Colliculus ◽  
Neuronal Activity ◽  
Reach Movements

scholarly journals The syntactic organization of pasta-eating and the structure of reach movements in the head-fixed mouse

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Ian Q. Whishaw ◽  
Jamshid Faraji ◽  
Jessica R. Kuntz ◽  
Behroo Mirza Agha ◽  
Gerlinde A. S. Metz ◽  
...  
Keyword(s):  
Reach Movements

Visual and Postural Constraints in Coordinated Movements of the Head in Hand Reaching Tasks

2002 ◽  
Vol 46 (17) ◽  
pp. 1636-1640 ◽  
Author(s):  
K. Han Kim ◽  
Bernard J. Martin
Keyword(s):  
Hand Movement ◽  
Head Rotation ◽  
Head Movements ◽  
Whole Body ◽  
Movement Onset ◽  
Major Function ◽  
Target Eccentricity ◽  
The Right ◽  
Reach Movements ◽  
Assembly Tasks

The purpose of the present study is to investigate movements of the head spatially and temporally coordinated with hand reach movements simulating industrial assembly tasks. The motions recorded from thirty subjects performing reach movements with the right hand toward eccentric targets indicate that 1) hand movement onset lags head movement onset with a duration proportional to target eccentricity; 2) the head does not aim directly at a target, but travels only a fraction of target eccentricity and often deviates away from the target substantially; and 3) head movements are constrained by the strategy of either controlling the head position in space or controlling head rotation about the torso. These results indicate that head movements are constrained by both visual and non-visual factors. While the major function of the head is to displace the visual gaze toward the target, non-visual constraints, which include postural coordination with whole body movements, also significantly affect head movements.

scholarly journals Action plan co-optimization reveals the parallel encoding of competing reach movements

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Jason P. Gallivan ◽  
Kathryn S. Barton ◽  
Craig S. Chapman ◽  
Daniel M. Wolpert ◽  
J. Randall Flanagan
Keyword(s):  
Action Plan ◽  
Reach Movements ◽  
Parallel Encoding

scholarly journals Wireless recording from unrestrained monkeys reveals motor goal encoding beyond immediate reach in frontoparietal cortex

2018 ◽  
Author(s):  
Michael Berger ◽  
Naubahar S. Agha ◽  
Alexander Gail
Keyword(s):  
Broad Band ◽  
Head Movements ◽  
Movement Planning ◽  
Whole Body ◽  
Body Movements ◽  
Neural Signals ◽  
Frontoparietal Network ◽  
Markerless Motion Capture ◽  
System Neuroscience ◽  
Reach Movements

AbstractSystem neuroscience of motor cognition regarding the space beyond immediate reach mandates free, yet experimentally controlled movements. We present an experimental environment (Reach Cage) and a versatile visuo-haptic interaction system (MaCaQuE) for investigating goal-directed whole-body movements of unrestrained monkeys. Two rhesus monkeys conducted instructed walk-and-reach movements towards targets flexibly positioned in the cage. We tracked 3D multi-joint arm and head movements using markerless motion capture. Movements show small trial-to-trial variability despite being unrestrained. We wirelessly recorded 192 broad-band neural signals from three cortical sensorimotor areas simultaneously. Single unit activity is selective for different reach and walk-and-reach movements. Walk-and-reach targets could be decoded from premotor and parietal but not motor cortical activity during movement planning. The Reach Cage allows systems-level sensorimotor neuroscience studies with full-body movements in a configurable 3D spatial setting with unrestrained monkeys. We conclude that the primate frontoparietal network encodes reach goals beyond immediate reach during movement planning.

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