Anticipatory Postural Adjustments and kinematic arm features when postural stability is manipulated

Bianca Callegari; Ghislain Saunier; Manuela Brito Duarte; Gizele Cristina da Silva Almeida; Cesar Ferreira Amorim; France Mourey; Thierry Pozzo; Givago da Silva Souza

doi:10.7717/peerj.4309

journal article Open Access Mar 15, 2018

Anticipatory Postural Adjustments and kinematic arm features when postural stability is manipulated

Bianca Callegari Ghislain Saunier Manuela Brito Duarte Gizele Cristina da Silva Almeida Cesar Ferreira Amorim France Mourey Thierry Pozzo Givago da Silva Souza

PeerJ Vol. 6 pp. e4309 · PeerJ

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Abstract

Beyond the classical paradigm that presents the Anticipatory Postural Adjustments (APAs) as a manner to create forces that counteract disturbances arising from the moving segment during a pointing task, there is a controversial discussion about the role APAs to facilitate the movement and perform a task accurately. In addition, arm kinematics features are classically used to infer the content of motor planning for the execution and the control of arm movements. The present study aimed to disentangle the conflicting role of APAs during an arm-pointing task in which the subjects reach a central diode that suddenly turns on, while their postural stability was manipulated. Three postures were applied: Standing (Up), Sit without feet support (SitUnsup) and Sit with feet support (SitSup). We found that challenging postural stability induced an increase of the reaction time and movement duration (observed for the SitUnsup compared to SitSUp and Up) as well as modified the upper-limb velocity profile. Indeed, a greater max velocity and a shorter deceleration time were observed under the highest stability (SitSup). Thus, these Kinematics features reflect less challenging task and simple motor plan when the body is stabilized. Concerning the APAs, we observed the presence of them independently of the postural stability. Such a result strongly suggests that APAs act to facilitate the limb movement and to counteract perturbation forces. In conclusion, the degree of stability seems particularly tuned to the motor planning of the upper-limb during a pointing task whereas the postural chain (sitting vs. standing) was also determinant for APAs.

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References

Details

Published: Mar 15, 2018
Vol/Issue: 6
Pages: e4309
License: View

Authors

B

Bianca Callegari

Laboratório de Estudos da Motricidade Humana, Universidade Federal do Pará, Belém, Brazil

G

Ghislain Saunier

Laboratorio de Cognição Motora, Universidade Federal do Pará, Belém, Brazil

M

Manuela Brito Duarte

Laboratório de Estudos da Motricidade Humana, Universidade Federal do Pará, Belém, Brazil

G

Gizele Cristina da Silva Almeida

Laboratório de Estudos da Motricidade Humana, Universidade Federal do Pará, Belém, Brazil

C

Cesar Ferreira Amorim

Doctoral and Masters Program in Physical Therapy, Universidade Cidade de São Paulo, São Paulo, Brazil

F

France Mourey

INSERM U1093, Cognition Action et Plasticité Sensori-motrice, Université de Bourgogne, Dijon, France

T

Thierry Pozzo

INSERM U1093, Cognition Action et Plasticité Sensori-motrice, Université de Bourgogne, Dijon, France; Italian Institute of Technology CTNSC@UniFe (Center of Translational Neurophysiology for Speech and Communication), Italian Institute of Technology, Ferrara, Italy

G

Givago da Silva Souza

Núcleo de Medicina Tropical, Instituto de Ciencias Biológicas, Universidade Federal do Pará, Belém, Brazil

Funding

Pará Amazon Research Support Foundation (FAPESPA) Award: #180/2012

Coordination for the Improvement of Higher Education Personnel (CAPES) / COFECUB Award: #819-14

Cite This Article

Bianca Callegari, Ghislain Saunier, Manuela Brito Duarte, et al. (2018). Anticipatory Postural Adjustments and kinematic arm features when postural stability is manipulated. PeerJ, 6, e4309. https://doi.org/10.7717/peerj.4309

Anticipatory Postural Adjustments and kinematic arm features when postural stability is manipulated

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