Modulation of the ~20-Hz motor-cortex rhythm to passive movement and tactile stimulation
| Autor: | Harri Piitulainen, Kristina Laaksonen, Lauri Parkkonen, Eeva Parkkonen, Nina Forss |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
magnetoencephalography
Adult Male proprioception Movement medicine.medical_treatment Beta rebound Stimulus (physiology) Somatosensory system 050105 experimental psychology beta rhythm Fingers 03 medical and health sciences Behavioral Neuroscience 0302 clinical medicine Physical Stimulation medicine Humans 0501 psychology and cognitive sciences Beta Rhythm sensorimotor integration Original Research Aged motor-cortex excitability Sensory stimulation therapy medicine.diagnostic_test 05 social sciences Motor Cortex Motor control Somatosensory Cortex Magnetoencephalography Middle Aged Transcranial magnetic stimulation medicine.anatomical_structure Touch Perception Touch Female Psychology Neuroscience 030217 neurology & neurosurgery Motor cortex |
| Zdroj: | Brain and Behavior |
| DOI: | 10.1002/brb3.328 |
| Popis: | Background Integration of afferent somatosensory input with motor-cortex output is essential for accurate movements. Prior studies have shown that tactile input modulates motor-cortex excitability, which is reflected in the reactivity of the ~20-Hz motor-cortex rhythm. ~20-Hz rebound is connected to inhibition or deactivation of motor cortex whereas suppression has been associated with increased motor cortex activity. Although tactile sense carries important information for controlling voluntary actions, proprioception likely provides the most essential feedback for motor control. Methods To clarify how passive movement modulates motor-cortex excitability, we studied with magnetoencephalography (MEG) the amplitudes and peak latencies of suppression and rebound of the ~20-Hz rhythm elicited by tactile stimulation and passive movement of right and left index fingers in 22 healthy volunteers. Results Passive movement elicited a stronger and more robust ~20-Hz rebound than tactile stimulation. In contrast, the suppression amplitudes did not differ between the two stimulus types. Conclusion Our findings suggest that suppression and rebound represent activity of two functionally distinct neuronal populations. The ~20-Hz rebound to passive movement could be a suitable tool to study the functional state of the motor cortex both in healthy subjects and in patients with motor disorders. |
| Databáze: | OpenAIRE |
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