Coordination of hand aperture with the spatial path of hand transport

1998 ◽  
Vol 118 (2) ◽  
pp. 286-292 ◽  
Author(s):  
P. Haggard ◽  
Alan Wing
Keyword(s):  
Hand Transport

Integrated control of hand transport and orientation during prehension movements

1996 ◽  
Vol 110 (2) ◽  
Author(s):  
Michel Desmurget ◽  
Claude Prablanc ◽  
Mohammad Arzi ◽  
Yves Rossetti ◽  
Yves Paulignan ◽  
...  
Keyword(s):  
Integrated Control ◽  
Prehension Movements ◽  
Hand Transport

On the Hand Transport Component of Prehensile Movements

1997 ◽  
Vol 29 (3) ◽  
pp. 282-287 ◽  
Author(s):  
Patrick Haggard ◽  
Alan Wing
Keyword(s):  
Transport Component ◽  
Hand Transport

The coordination of hand transport and grasp formation during single- and double-perturbed human prehension movements

2002 ◽  
Vol 145 (3) ◽  
pp. 365-371 ◽  
Author(s):  
A. Dubrowski ◽  
O. Bock ◽  
H. Carnahan ◽  
S. Jüngling
Keyword(s):  
Prehension Movements ◽  
Hand Transport

scholarly journals A review of grasping as the movements of digits in space

2019 ◽  
Vol 122 (4) ◽  
pp. 1578-1597 ◽  
Author(s):  
Jeroen B. J. Smeets ◽  
Katinka van der Kooij ◽  
Eli Brenner
Keyword(s):  
Neural Control ◽  
The Other ◽  
Reach To Grasp ◽  
Grip Aperture ◽  
Trade Off ◽  
Size Information ◽  
Direct Support ◽  
Speed Accuracy ◽  
Hand Transport ◽  
Fast Responses

It is tempting to describe human reach-to-grasp movements in terms of two, more or less independent visuomotor channels, one relating hand transport to the object’s location and the other relating grip aperture to the object’s size. Our review of experimental work questions this framework for reasons that go beyond noting the dependence between the two channels. Both the lack of effect of size illusions on grip aperture and the finding that the variability in grip aperture does not depend on the object’s size indicate that size information is not used to control grip aperture. An alternative is to describe grip formation as emerging from controlling the movements of the digits in space. Each digit’s trajectory when grasping an object is remarkably similar to its trajectory when moving to tap the same position on its own. The similarity is also evident in the fast responses when the object is displaced. This review develops a new description of the speed-accuracy trade-off for multiple effectors that is applied to grasping. The most direct support for the digit-in-space framework is that prism-induced adaptation of each digit’s tapping movements transfers to that digit’s movements when grasping, leading to changes in grip aperture for adaptation in opposite directions for the two digits. We conclude that although grip aperture and hand transport are convenient variables to describe grasping, treating grasping as movements of the digits in space is a more suitable basis for understanding the neural control of grasping.

A model of the coupling between grip aperture and hand transport during human prehension

2005 ◽  
Vol 167 (2) ◽  
pp. 301-304 ◽  
Author(s):  
Yaoping Hu ◽  
Rieko Osu ◽  
Masato Okada ◽  
Melvyn A. Goodale ◽  
Mitsuo Kawato
Keyword(s):  
Grip Aperture ◽  
Hand Transport

Impaired prehension is associated with lesions of the superior and inferior hand representation within the human cerebellum

2011 ◽  
Vol 105 (5) ◽  
pp. 2018-2029 ◽  
Author(s):  
Michael Küper ◽  
Barbara Brandauer ◽  
Markus Thürling ◽  
Beate Schoch ◽  
Elke R. Gizewski ◽  
...  
Keyword(s):  
Cerebellar Cortex ◽  
Grip Force ◽  
Posterior Inferior Cerebellar Artery ◽  
Nonparametric Test ◽  
Movement Speed ◽  
Superior Cerebellar Artery ◽  
Hand Shaping ◽  
Cerebellar Artery ◽  
Human Cerebellum ◽  
Hand Transport

Impairment of patients with cerebellar disease in prehension is well recognized. So far specific localizations within the human cerebellum associated with the impairment have rarely been assessed. To address this question we performed voxel-based lesion symptom mapping (VLSM) in patients with chronic focal cerebellar lesions in relation to specific deficits in prehensile movements. Patients with stroke within the posterior inferior cerebellar artery territory ( n = 13) or the superior cerebellar artery (SCA) territory ( n = 7) and corresponding control subjects were included in the study. Participants reached out, grasped, and lifted an object with either the left or right hand and with fast or normal movement speed. Both kinematic and grip-force parameters were recorded. Magnetic resonance imaging anatomical scans of the cerebellum were acquired, and lesions were marked as regions of interest. For VLSM analysis, a nonparametric test (Brunner-Munzel) was applied. Cerebellar patients showed clear abnormalities in hand transport (impaired movement speed and straightness) and, to a lesser degree, in hand shaping (increased finger touch latencies) while grip function was preserved. Deficits were most prominent in patients with SCA lesions and for ipsilesional, fast movements. Disorders in hand transport may be more difficult to compensate than deficits in hand shaping and grip-force control in chronic focal lesions of the cerebellum because of higher demands on predictive control of interaction torques. Lesions of the superior cerebellar cortex (lobules IV, V, VI) were associated with slower hand transport, whereas lesions of both superior (lobules VI, V, VI) and inferior cerebellar cortex (lobules VII, VIII) were associated with impaired movement straightness. These findings show that both the superior and inferior hand representations within the cerebellum contribute to hand transport during prehensile movements; however, they may have a different functional role.

Transport Policy and Trans-European Networks

2018 ◽  
Author(s):  
Roland Bieber
Keyword(s):  
National Level ◽  
Modern Society ◽  
Economic Factor ◽  
Transport Policy ◽  
The Other ◽  
Secondary Effects ◽  
Public Intervention ◽  
Wide Range ◽  
Inland Waterway ◽  
Hand Transport

Transport is one of the foundations of modern society; it is a precondition of a functioning economy and an important economic factor in itself. Transport, by definition, vanquishes space, and hence borders. On the other hand, transport has social implications, and gives rise to secondary effects and to risks in respect of the environment and people’s health. For these and additional strategic reasons, public intervention at national level, on the basis of national criteria and preferences, has a long tradition in the field. Moreover, the notion of transport covers in practice the very wide range of modes: road, inland waterway, rail, sea, and air, with many variations and combinations.

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