PMID-6869036[0] The Piper rhythm--a phenomenon related to muscle resonance characteristics?
- Piper rhythm: the tendency towards rhytmical 40-60 Hz grouping of motor unit potentials in steadily contracting human muscles.
- Recording of nerves in muscles did not support the idea that the Piper rhythm is dependent on afferent spindle pulses causing reflex entrainment. (loop too slow).
- TThis wouldn't make sense anyway, as the same rhythm appears in different muscles with markedly different mechanical properties.
- Likkely cause is the cerebrum, upper oscillations. Interesting!
- See also: PMID-9862895[1] Cortical correlate of the Piper rhythm in humans.
- MEG data is consistent with the cortex being the origin of the Piper rhythm.
- And PMID-10203308[2] Rhythmical corticomotor communication.
- The rhythmic modulation may form a tool for efficient driving of motor units but we express some reservations about the assumed binding and attention-related roles of the rolandic brain rhythms.
- PMID-10622378[3] Cortical drives to human muscle: the Piper and related rhythms.
- Alternately, oscillations may be a form of holding state.
- They think gamma frequencies are a means of binding together simultaneously activated isometric muscles.
- Inadequate output from the basal ganglia leads to a disappearance of the beta and piper drives to muscle.
- Did we see and piper band osc activity? Did not look.
____References____
[0] Hagbarth KE, Jessop J, Eklund G, Wallin EU, The Piper rhythm--a phenomenon related to muscle resonance characteristics?Acta Physiol Scand 117:2, 263-71 (1983 Feb) |
[1] Brown P, Salenius S, Rothwell JC, Hari R, Cortical correlate of the Piper rhythm in humans.J Neurophysiol 80:6, 2911-7 (1998 Dec) |
[2] Hari R, Salenius S, Rhythmical corticomotor communication.Neuroreport 10:2, R1-10 (1999 Feb 5) |
[3] Brown P, Cortical drives to human muscle: the Piper and related rhythms.Prog Neurobiol 60:1, 97-108 (2000 Jan) |
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