Self-induced versus reactive triggering of synchronous movements in a deafferented patient and control subjects
Self-induced versus reactive triggering of synchronous movements in a deafferented patient and control subjects
The present study investigates the contribution of tactile-kinesthetic information to the timing of movements. The relative timing of simultaneous tapping movements of finger and foot (hand-foot asynchrony) was examined in a simple reaction time task and in discrete self-initiated taps (Experiment 1), and in externally triggered synchronization tapping (Experiment 2). We compared the performance of a deafferented participant (IW) to the performance of two control groups of different ages. The pattern of results in control groups replicates previous findings: Whereas positive hand-foot asynchronies (hand precedes foot) are observed in a simultaneous reaction to an auditory stimulus, hand-foot asynchronies are negative with discrete self-initiated as well as auditorily paced sequences of synchronized finger and foot taps. In the first case, results are explained by a simultaneous triggering of motor commands. In contrast, self-initiated and auditorily paced movements are assumed to be controlled in terms of their afferent consequences, as provided by tactile-kinesthetic information. The performance of the deafferented participant differed from that of healthy participants in some aspects. As expected on the basis of unaffected motor functions, the participant was able to generate finger and foot movements in reaction to an external signal. In spite of the lack of movement-contingent sensory feedback, the deafferented participant showed comparable timing errors in self-initiated and regularly paced tapping as observed in control participants. However, in discrete self-initiated taps IW's hand-foot asynchronies were considerably larger than in control participants, while performance did not differ from that of controls in continuous movement generation. These findings are discussed in terms of an internal generation of the movement's sensory consequences (forward-modeling).
40-49
Stenneken, P.
6232cee9-e443-49d4-b438-b779fdfe51d9
Aschersleben, G.
cbcb4e95-5f1f-430c-8dcc-ffdee402c1fa
Cole, J.
d119a5ba-9ca3-43db-9d98-950ca225655d
Prinz, W.
98ce016b-9b85-4a40-bb8e-73cbc3dce622
2002
Stenneken, P.
6232cee9-e443-49d4-b438-b779fdfe51d9
Aschersleben, G.
cbcb4e95-5f1f-430c-8dcc-ffdee402c1fa
Cole, J.
d119a5ba-9ca3-43db-9d98-950ca225655d
Prinz, W.
98ce016b-9b85-4a40-bb8e-73cbc3dce622
Stenneken, P., Aschersleben, G., Cole, J. and Prinz, W.
(2002)
Self-induced versus reactive triggering of synchronous movements in a deafferented patient and control subjects.
Psychological Research, 66 (1), .
(doi:10.1007/s004260100072).
Abstract
The present study investigates the contribution of tactile-kinesthetic information to the timing of movements. The relative timing of simultaneous tapping movements of finger and foot (hand-foot asynchrony) was examined in a simple reaction time task and in discrete self-initiated taps (Experiment 1), and in externally triggered synchronization tapping (Experiment 2). We compared the performance of a deafferented participant (IW) to the performance of two control groups of different ages. The pattern of results in control groups replicates previous findings: Whereas positive hand-foot asynchronies (hand precedes foot) are observed in a simultaneous reaction to an auditory stimulus, hand-foot asynchronies are negative with discrete self-initiated as well as auditorily paced sequences of synchronized finger and foot taps. In the first case, results are explained by a simultaneous triggering of motor commands. In contrast, self-initiated and auditorily paced movements are assumed to be controlled in terms of their afferent consequences, as provided by tactile-kinesthetic information. The performance of the deafferented participant differed from that of healthy participants in some aspects. As expected on the basis of unaffected motor functions, the participant was able to generate finger and foot movements in reaction to an external signal. In spite of the lack of movement-contingent sensory feedback, the deafferented participant showed comparable timing errors in self-initiated and regularly paced tapping as observed in control participants. However, in discrete self-initiated taps IW's hand-foot asynchronies were considerably larger than in control participants, while performance did not differ from that of controls in continuous movement generation. These findings are discussed in terms of an internal generation of the movement's sensory consequences (forward-modeling).
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Published date: 2002
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Local EPrints ID: 27719
URI: http://eprints.soton.ac.uk/id/eprint/27719
ISSN: 0340-0727
PURE UUID: 3bc1e3fe-6798-42e4-8d37-6ed9ed07cb04
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Date deposited: 25 Apr 2006
Last modified: 15 Mar 2024 07:20
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Author:
P. Stenneken
Author:
G. Aschersleben
Author:
J. Cole
Author:
W. Prinz
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