Experimental Brain Research

Journal: Experimental Brain Research

Abbreviation

Exp Brain Res

Publisher

Springer

ISSN

0014-4819
1432-1106

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Publications 1 - 10 of 38

Activity of human motor system during action observation is modulated by object presence
Villiger, Michael; Chandrasekharan, Sanjay; Welsh, Timothy N. (2011)
Experimental Brain Research
Learning and transfer of bimanual multifrequency patterns: effector-independent and effector-specific levels of movement representation
Vangheluwe, Sophie; Suy, Ellen; Wenderoth, Nicole; et al. (2006)
Experimental Brain Research
Facilitated extinction of appetitive instrumental conditioning following excitotoxic lesions of the core or the medial shell subregions of the nucleus accumbens in rats
Pothuizen, Helen H.; Feldon, Joram; Yee, Benjamin K. (2006)
Experimental Brain Research
The modulation of short and long-latency interhemispheric inhibition during bimanually coordinated movements
Jordan, Haary T.; Schrafl-Altermatt, Miriam; Byblow, Winston D.; et al. (2021)
Experimental Brain Research
Bimanual coordination is essential for the performance of many everyday tasks. There are several types of bimanually coordinated movements, classified according to whether the arms are acting to achieve a single goal (cooperative) or separate goals (independent), and whether the arms are moving symmetrically or asymmetrically. Symmetric bimanual movements are thought to facilitate corticomotor excitability (CME), while asymmetric bimanual movements are thought to recruit interhemispheric inhibition to reduce functional coupling between the motor cortices. The influences of movement symmetry and goal conceptualisation on interhemispheric interactions have not been studied together, and not during bimanually active dynamic tasks. The present study used transcranial magnetic stimulation (TMS) to investigate the modulation of CME and short- and long-latency interhemispheric inhibition (SIHI and LIHI, respectively) during bimanually active dynamic tasks requiring different types of bimanual coordination. Twenty healthy right-handed adults performed four bimanual tasks in which they held a dumbbell in each hand (independent) or a custom device between both hands (cooperative) while rhythmically flexing and extending their wrists symmetrically or asymmetrically. Motor-evoked potentials were recorded from the right extensor carpi ulnaris. We found CME was greater during asymmetric tasks than symmetric tasks, and movement symmetry did not modulate SIHI or LIHI. There was no effect of goal conceptualisation nor any interaction with movement symmetry for CME, SIHI or LIHI. Based on these results, movement symmetry and goal conceptualisation may not modulate interhemispheric inhibition during dynamic bimanual tasks. These findings contradict prevailing thinking about the roles of CME and interhemispheric inhibition in bimanual coordination.
Temporal and spatial patterns of cortical activation during assisted lower limb movement
Wieser, Martin; Haefeli, Jenny; Bütler, Lilith; et al. (2010)
Experimental Brain Research
Influence of anti-Nogo-A antibody treatment on the reorganization of callosal connectivity of the premotor cortical areas following unilateral lesion of primary motor cortex (M1) in adult macaque monkeys
Hamadjida, Adjia; Wyss, Alexander F.; Mir, Anis; et al. (2012)
Experimental Brain Research
Muscle-specific modulation of indirect inputs to primary motor cortex during action observation
Cretu, Andreea; Ruddy, Kathy L.; Post, Alain; et al. (2020)
Experimental Brain Research
Single-pulse transcranial magnetic stimulation (spTMS) studies report that movement observation facilitates corticospinal excitability in primary motor cortex (M1) in a muscle-specific manner. However, motor evoked potentials (MEPs) elicited by spTMS are known to reflect the summation of several descending volleys in corticospinal neurons which are evoked via mono- and polysynaptic inputs (so-called indirect waves or I-waves). It is unclear which of these components contribute to the muscle-specific modulation of M1 during action observation. The interactions between different I-waves are reflected in the facilitatory peaks elicited with a short-intracortical facilitation (SICF) protocol when two pulses are sent to M1 at precise intervals (i.e., 1.3, 2.5 or 4.1 ms). Here, we explored the modulation of early and late SICF peaks during action observation by measuring highly specific MEP amplitude changes measured in two muscles (index, FDI and little finger, ADM) while participants observed two different actions (precision and whole-hand grip). Our results demonstrate that both early (1.3 ms) and late (2.5 and 4.1 ms) SICF peaks are modulated in the context of movement observation. However, only the second peak (ISI 2.5 ms) was significantly associated with the muscle-specific modulation of corticospinal excitability as measured with spTMS. This late SICF peak is believed to reflect the activity cortico-cortical pathways involved in the facilitation of muscle-specific representations in M1. Thus, our findings suggest that movement observation leads to widespread activation of different neural circuits within M1, including those mediating cortico-cortical communication.
Ankle dexterity remains intact in patients with incomplete spinal cord injury in contrast to stroke patients
Wirth, Brigitte; van Hedel, Hubertus J.A.; Curt, Armin (2008)
Experimental Brain Research
Stump nerve signals during transcranial magnetic motor cortex stimulation recorded in an amputee via longitudinal intrafascicular electrodes
Rossini, P.M.; Rigosa, Jacopo; Micera, Silvestro; et al. (2011)
Experimental Brain Research
Coherent intracerebral brain oscillations during learned continuous tracking movements
Blum, Julia; Lutz, Kai; Pascual-Marqui, Roberto; et al. (2008)
Experimental Brain Research

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