title: Context-dependent neuroelectric responses during motor control.
abstract: Research on brain responses during motor control is usually performed under typical laboratory settings. However, everyday life and the laboratory differ in many aspects, such as purposeful and motivated behavior; and there's no awareness of "being measured" in everyday life. In the laboratory, movements are usually explicitly instructed, overtly measured and follow no intrinsic motivated purpose. Therefore, here we present a new method to measure and reliably analyze neuroelectric brain responses by EEG, as well as kinematics during the performance of grasping movements in two different behavioral contexts. One context (L) simulates a typical laboratory task and another context (E) uses selected features of everyday behavior. However, in both tasks the mechanical constraints and stimuli for the movement are exactly the same. Amplitudes of event-related N200 and P300 measured at the brain's midline were differentially affected by the two contexts. P300 was increased in L compared to E. N200 was distinct at anterior electrode sites (Fz, Cz) in context E, while it was elevated at posterior electrode sites (Pz, Oz) in context L. For the first time, kinematic and electrophysiological recordings are combined to analyze identical movements, performed in varied behavioral contexts. The results indicate that brain responses measured under typical laboratory context may not be necessarily transferred to everyday life; thus, the present approach offers a wide range of new questions to analyze context-dependent brain responses.
authors.affiliation: Institute of Physiology and Anatomy, German Sport University Cologne, Am Sportpark Müngersdorf 6, 50933 Cologne, Germany; Institute of Sport Science, Johannes Gutenberg University Mainz, Albert Schweitzer Straße 22, 55099 Mainz, Germany. Electronic address: fabian.steinberg@uni-mainz.de.
authors.forename: Fabian
authors.initials: F
authors.lastname: Steinberg
authors.affiliation: Institute of Movement and Neuroscience, German Sport University Cologne, Am Sportpark Müngersdorf 6, 50933 Cologne, Germany; Center for Health and Integrative Physiology in Space, German Sport University Cologne, Am Sportpark Müngersdorf 6, 50933 Cologne, Germany. Electronic address: t.vogt@dshs-koeln.de.
authors.forename: Tobias
authors.initials: T
authors.lastname: Vogt
mesh_terms: D000328:Adult; D001288:Attention / Q000502:physiology; D001696:Biomechanical Phenomena / Q000502:physiology; D001921:Brain / Q000502:physiology*; D004569:Electroencephalography; D005260:Female; D018737:Hand Strength / Q000502:physiology*; D006801:Humans; D008297:Male; D009068:Movement / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology; D013647:Task Performance and Analysis; D055815:Young Adult
keywords: Attention; Cognition; EEG; Grasping; N200; P300