Probing the motor program: Effects of output competition during movement preparation |
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| Institution: | 1. Department of Medical Research, China Medical University Hospital, Taichung 40447, Taiwan;2. School of Medicine, College of Medicine, China Medical University, Taichung 40402, Taiwan;3. Department of Bioinformatics and Medical Engineering, Asia University, Taichung 41354, Taiwan;4. School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Guangzhou 510275, China;1. Atmospheric Science Research Laboratory, Department of Physics, SRM Institute of Science and Technology, Kattankulathur 603203, India;2. Tribhuvan University, Kathmandu, Nepal;3. King Abdullah University of Science and Technology (KAUST), Physical Sciences and Engineering Division, Thuwal, Saudi Arabia;4. Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, India;1. Centre for Advanced Numerical Simulation (CANSIM), Department of Civil and Geological Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9, Canada;2. Global Institute of Water Security, University of Saskatchewan, 11 Innovation Boulevard, Saskatoon, SK S7N 3H5, Canada;1. Instituto de Biofísica Carlos Chagas Filho, Laboratório de Neuroquímica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil;2. Núcleo Multidisciplinar de Pesquisa em Biologia (Numpex-Bio), Campus de Duque de Caxias Geraldo Guerra Cidade, Universidade Federal do Rio de Janeiro, Duque de Caxias, RJ 25255-030, Brazil |
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| Abstract: | A probe reaction-time paradigm was used to investigate the capacity demands of planning rapid aiming movements. Subjects were required to respond either vocally or manually to an auditory probe presented during the reaction-time interval preceding a pointing response. When a vocal response was required probe reaction time increased systematically with the complexity of the pointing movements. Presumably this is because a more complex task requires more programming resources. When a manual response was required, reaction-time data for both the pointing task and the probe indicate that the structural constraints inherent in programming two similar movements may force subjects to engage in common response preparation. The methodological and theoretical implications of these findings are discussed. |
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