%0 Journal Article %1 Bock1997 %A Bock, Otmar %A Burghoff, Martin %D 1997 %J Behavioural Brain Research %K Adaptation; Humans Motor Parameters; Pointing; Sensorimotor integration; programs; %P 267–273 %T Visuo-motor adaptation: evidence for a distributed amplitude control system %V 89 %X We investigated the constraints for visuo-motor adaptation in human pointing movements. Subjects pointed at sequentially presented visual targets while visual feedback about their finger position was either absent (pre- and post-period), or was manipulated such as to require a gradual reduction of response amplitude (per-period). We found that response amplitudes were smaller during the post- than during the pre-period, which documents the existence of adaptation to distorted visual feedback. We further found that adaptation can transfer fully to untrained amplitudes (Exp. 1), although the amount of transfer may be reduced if trained and untrained amplitudes are substantially different (Exp. 2). However, selective adaptation of one amplitude but not another can also be yielded if the paradigm explicitly asks for it (Exp. 3), and if the two amplitudes differ by more than about 10 cm (Exp. 4). We conclude from these findings that the adapted mechanism consists of amplitude-specific elements, tuned to amplitude spans of some 10 cm.

@article{Bock1997, abstract = {We investigated the constraints for visuo-motor adaptation in human pointing movements. Subjects pointed at sequentially presented visual targets while visual feedback about their finger position was either absent (pre- and post-period), or was manipulated such as to require a gradual reduction of response amplitude (per-period). We found that response amplitudes were smaller during the post- than during the pre-period, which documents the existence of adaptation to distorted visual feedback. We further found that adaptation can transfer fully to untrained amplitudes (Exp. 1), although the amount of transfer may be reduced if trained and untrained amplitudes are substantially different (Exp. 2). However, selective adaptation of one amplitude but not another can also be yielded if the paradigm explicitly asks for it (Exp. 3), and if the two amplitudes differ by more than about 10 cm (Exp. 4). We conclude from these findings that the adapted mechanism consists of amplitude-specific elements, tuned to amplitude spans of some 10 cm. }, added-at = {2009-06-26T15:25:19.000+0200}, author = {Bock, Otmar and Burghoff, Martin}, biburl = {https://www.bibsonomy.org/bibtex/210fbbeb7e1397cb2c6716bb9894204b1/butz}, description = {diverse cognitive systems bib}, interhash = {198c955d9f559e10cb2fcafffafbb564}, intrahash = {10fbbeb7e1397cb2c6716bb9894204b1}, journal = {Behavioural Brain Research}, keywords = {Adaptation; Humans Motor Parameters; Pointing; Sensorimotor integration; programs;}, owner = {martin}, pages = {267–273}, review = {four experiments were done: 1) adaptation of movement amplitude from small to large movements and v.v. (3-7 vs 12-29cm) -> amplitude gain generalizes 2) adaptation to very short (3.75) vs (very large 26.25) movements yields less trasnfer from small to large movements and v.v. 3) Selective adaptation to gains in only short or only wide movements (3.75 vs 26) also possible 4) transfer rises (i.e. interference) for exp 3) if movement distances become closer to each other. -> There seems to be an amplitude depending gain modulation in movement execuition.}, timestamp = {2009-06-26T15:25:22.000+0200}, title = {Visuo-motor adaptation: evidence for a distributed amplitude control system}, volume = 89, year = 1997 }