Mu rhythm

Mu rhythm

Mu rhythm (μ rhythm) is a kind of brain wave rhythm measured using Electroencephalography that has a maximal amplitude of somatosensory cortices at rest. It is also called arciform rhythm because of the shape of the waveforms.

Description

Usually encompassed in the alpha range (8-12Hz), it is strongly suppressed during the performance of contralateral motor acts. Modulation of the μ rhythm is believed to reflect the electrical output of the synchronization of large portions of pyramidal neurons of the motor cortex which control the hand and arm movement when inactive. In 1950 Gastaut and his coworkers reported desynchronization of these rhythms not only during active movements of their subjects, but also while the subjects observed actions executed by someone else.[1][2] These results were later confirmed by additional research groups,[3][4][5] including a study using subdural electrode grids in epileptic patients.[6] The latter study showed mu suppression while the patients observed moving body parts in somatic areas of the cortex that corresponded to the body part moved by the actor. Further studies have shown that the mu rhythms can also be desynchronized by imaging actions[7][8] and by passively viewing point-light biological motion.[9] Current research concerning the mu rhythm is concerned with the development of this rhythm in infancy, its possible links to the human mirror neuron system, and the implications of the sensorimotor origins of this rhythm.

References

  1. ^ Cohen-Seat, G., Gastaut, H., Faure, J., & Heuyer, G. (1954). Etudes experimentales de l’activite nerveuse pendant la projection cinematographique. Rev. Int. Filmologie, 5, 7-64.
  2. ^ Gastaut, H. J., & Bert, J. (1954). EEG changes during cinematographic presentation. Electroencephalogr. Clin. Neurophysiol., 6, 433-444.
  3. ^ Cochin, S., Barthelemy, C., Lejeune, B., Roux, S., & Martineau, J. (1998). Perception of motion and qEEG activity in human adults. Electroencephalogr Clin Neurophysiol, 107(4), 287-295.
  4. ^ Cochin, S., Barthelemy, C., Roux, S., & Martineau, J. (1999). Observation and execution of movement: similarities demonstrated by quantified electroencephalography. Eur J Neurosci, 11(5), 1839-1842.
  5. ^ Muthukumaraswamy, S. D., Johnson, B. W., & McNair, N. A. (2004). Mu rhythm modulation during observation of an object-directed grasp. Brain Res Cogn Brain Res, 19(2), 195-201.
  6. ^ Arroyo, S., Lesser, R. P., Gordon, B., Uematsu, S., Jackson, D., & Webber, R. (1993). Functional significance of the mu rhythm of human cortex: an electrophysiologic study with subdural electrodes. Electroencephalography and Clinical Neurophysiology 87(3), 76-87.
  7. ^ Pfurtscheller, G., Brunner, C., Schlogl, A., & Lopes da Silva, F. H. (2006). Mu rhythm (de)synchronization and EEG single-trial classification of different motor imagery tasks. Neuroimage, 31(1), 153-159.
  8. ^ Pineda, J. A., Allison, B. Z., & Vankov, A. (2000). The effects of self-movement, observation, and imagination on mu rhythms and readiness potentials (RP's): toward a brain–computer interface (BCI). IEEE Trans Rehabil Eng, 8(2), 219-222.
  9. ^ Ulloa, E. R., & Pineda, J. A. (2007). Recognition of point-light biological motion: mu rhythms and mirror neuron activity. Behav Brain Res, 183(2), 188-194.

Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Rhythm Nation — Single par Janet Jackson extrait de l’album Rhythm Nation 1814 Face B Rhythm Nation (Instrumental) Sortie 23 octobre 1989 (Royaume Uni) 24 octobre 1989 (États Unis) Enregistrement Janvier 1989; Flyte Tyme Studios …   Wikipédia en Français

  • Rhythm Thief & the Emperor’s Treasure — Европейская обложка …   Википедия

  • rhythm and blues — ☆ rhythm and blues n. a form of American popular music, influenced by the blues and characterized by a strong beat: rock and roll derives from it * * * (abbr R and B) n a style of popular music of the 1950s and 1960s played especially by African… …   Universalium

  • Rhythm and Blues — (auch Rhythm Blues, abgekürzt: R B, R ’n’ B oder auch RnB) bezeichnet den in den 1940er Jahren vorherrschenden Stil afroamerikanischer Popmusik: eine rhythmisch stark akzentuierte Form des Blues, aus der später Rock ’n’ Roll, die von Weißen… …   Deutsch Wikipedia

  • Rhythm and Blues — 〈[rı̣ðm ənd blu:z] m.; ; unz.〉 stark rhythmisierte Bluesmusik der amerikanischen Schwarzen [engl., „Rhythmus und Blues“] * * * Rhythm and Blues [ rɪðəm ənd blu:z], der; [engl. rhythm and blues]: aufrüttelnder Musikstil der Schwarzen Nordamerikas …   Universal-Lexikon

  • Rhythm & Sound — Rhythm Sound Rhythm Sound Rhythm Sound en 2007 au festival MUTEK Alias Maurizio Basic Cha …   Wikipédia en Français

  • Rhythm & Sound (label) — Rhythm Sound Rhythm Sound Rhythm Sound en 2007 au festival MUTEK Alias Maurizio Basic Cha …   Wikipédia en Français

  • Rhythm & sound — Rhythm Sound Rhythm Sound Rhythm Sound en 2007 au festival MUTEK Alias Maurizio Basic Cha …   Wikipédia en Français

  • Rhythm & Sound — en 2007 au festival MUTEK Surnom Maurizio Basic Channel …   Wikipédia en Français

  • Rhythm guitar — is the use of a guitar to provide rhythmic chordal accompaniment for a singer or other instruments in a musical ensemble. In ensembles or bands playing within the country, blues, rock or metal genres (among others), a guitarist playing the rhythm …   Wikipedia

  • Rhythm of Love — Студийный альбом …   Википедия

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”