Shifts of the point-of-change can be attributed to a lower mechanical cost of motor execution

Schütz C, Schack T (2020)
EXPERIMENTAL BRAIN RESEARCH.

Zeitschriftenaufsatz | E-Veröff. vor dem Druck | Englisch
 
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Abstract / Bemerkung
In a previous study on hand selection in a sequential reaching task, the authors showed a shift of the point-of-change (POC) to the left of the midline. This implies that participants conducted a number of contralateral reaches with their dominant, right hand. Contralateral movements have longer planning and execution times and a lower precision. In the current study, we asked whether lower mechanical costs of motor execution or lower cognitive costs of motor planning compensated for these disadvantages. Theories on hemispheric differences postulate lower mechanical costs in the dominant hemisphere and lower cognitive costs in the left hemisphere (independent of handedness). In right-handed participants, both factors act agonistically to reduce the total cost of right-handed reaches. To distinguish between the cost factors, we had left- and right-hand-dominant participants execute a sequential, unimanual reaching task. Results showed a left-shift of the POC in the right-handed and a right-shift in the left-handed group. Both shifts were similar in magnitude. These findings indicate that only the mechanical cost of motor execution compensates for the disadvantages of the contralateral reaches, while the cognitive cost of motor planning is irrelevant for the POC shift.
Stichworte
Motor planning; Motor hysteresis; Reaching; Handedness; Cognitive cost; Mechanical cost
Erscheinungsjahr
2020
Zeitschriftentitel
EXPERIMENTAL BRAIN RESEARCH
ISSN
0014-4819
eISSN
1432-1106
Page URI
https://pub.uni-bielefeld.de/record/2942724

Zitieren

Schütz C, Schack T. Shifts of the point-of-change can be attributed to a lower mechanical cost of motor execution. EXPERIMENTAL BRAIN RESEARCH. 2020.
Schütz, C., & Schack, T. (2020). Shifts of the point-of-change can be attributed to a lower mechanical cost of motor execution. EXPERIMENTAL BRAIN RESEARCH. doi:10.1007/s00221-020-05781-3
Schütz, C., and Schack, T. (2020). Shifts of the point-of-change can be attributed to a lower mechanical cost of motor execution. EXPERIMENTAL BRAIN RESEARCH.
Schütz, C., & Schack, T., 2020. Shifts of the point-of-change can be attributed to a lower mechanical cost of motor execution. EXPERIMENTAL BRAIN RESEARCH.
C. Schütz and T. Schack, “Shifts of the point-of-change can be attributed to a lower mechanical cost of motor execution”, EXPERIMENTAL BRAIN RESEARCH, 2020.
Schütz, C., Schack, T.: Shifts of the point-of-change can be attributed to a lower mechanical cost of motor execution. EXPERIMENTAL BRAIN RESEARCH. (2020).
Schütz, Christoph, and Schack, Thomas. “Shifts of the point-of-change can be attributed to a lower mechanical cost of motor execution”. EXPERIMENTAL BRAIN RESEARCH (2020).

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