Understanding dual task performance in humans : electrophysiological correlates of interferences and costs between motor and working memory tasks at different levels of workload
| dc.contributor.advisor | Ossandón, Tomás | |
| dc.contributor.author | Arriagada Tarifeño, David Andrés | |
| dc.contributor.other | Pontificia Universidad Católica de Chile. Facultad de Medicina | |
| dc.date.accessioned | 2020-08-05T12:15:55Z | |
| dc.date.available | 2020-08-05T12:15:55Z | |
| dc.date.issued | 2019 | |
| dc.description | Tesis (Ph.D. in Neurosciences)--Pontificia Universidad Católica de Chile, 2019 | |
| dc.description.abstract | The simultaneous execution of two different tasks is associated with interference processes that produce a decrease in the performance of one or both duties, a common phenomenon whose neural mechanisms are not yet understood. We recorded electroencephalographic activity (EEG) during cognitive-motor interference in 24 subjects, using a working memory N-back task concurrent with a finger movement both tests were performed on 3 different workloads (easy, medium and hard) resulting in 9 dual tasks of different difficulty levels. A time-frequency analysis of the EEG showed a midline decrease of theta band activity and an increase of alpha band activity when both tasks progressed to a motor workload medium level. The current study shows the development of an opposing oscillatory pattern of alpha and theta, which can be linked to the interferential effects of cognitive-motor task, determining the fall in the overall performance of the test. These effects are only a product of the increase in the difficulty of the motor task.The simultaneous execution of two different tasks is associated with interference processes that produce a decrease in the performance of one or both duties, a common phenomenon whose neural mechanisms are not yet understood. We recorded electroencephalographic activity (EEG) during cognitive-motor interference in 24 subjects, using a working memory N-back task concurrent with a finger movement both tests were performed on 3 different workloads (easy, medium and hard) resulting in 9 dual tasks of different difficulty levels. A time-frequency analysis of the EEG showed a midline decrease of theta band activity and an increase of alpha band activity when both tasks progressed to a motor workload medium level. The current study shows the development of an opposing oscillatory pattern of alpha and theta, which can be linked to the interferential effects of cognitive-motor task, determining the fall in the overall performance of the test. These effects are only a product of the increase in the difficulty of the motor task.The simultaneous execution of two different tasks is associated with interference processes that produce a decrease in the performance of one or both duties, a common phenomenon whose neural mechanisms are not yet understood. We recorded electroencephalographic activity (EEG) during cognitive-motor interference in 24 subjects, using a working memory N-back task concurrent with a finger movement both tests were performed on 3 different workloads (easy, medium and hard) resulting in 9 dual tasks of different difficulty levels. A time-frequency analysis of the EEG showed a midline decrease of theta band activity and an increase of alpha band activity when both tasks progressed to a motor workload medium level. The current study shows the development of an opposing oscillatory pattern of alpha and theta, which can be linked to the interferential effects of cognitive-motor task, determining the fall in the overall performance of the test. These effects are only a product of the increase in the difficulty of the motor task. | |
| dc.format.extent | 84 páginas | |
| dc.identifier.doi | 10.7764/tesisUC/MED/38017 | |
| dc.identifier.uri | https://doi.org/10.7764/tesisUC/MED/38017 | |
| dc.identifier.uri | https://repositorio.uc.cl/handle/11534/38017 | |
| dc.language.iso | en | |
| dc.nota.acceso | Contenido completo | |
| dc.rights | acceso abierto | |
| dc.subject.ddc | 612.81046 | |
| dc.subject.dewey | Medicina y salud | es_ES |
| dc.subject.other | Neuronas motoras - Fisiología | es_ES |
| dc.subject.other | Electroencefalografía | es_ES |
| dc.title | Understanding dual task performance in humans : electrophysiological correlates of interferences and costs between motor and working memory tasks at different levels of workload | es_ES |
| dc.type | tesis doctoral | |
| sipa.codpersvinculados | 1011810 | |
| sipa.codpersvinculados | 224699 |