The alpha-motoneuron pool as transmitter of rhythmicities in cortical motor drive
- PMID: 20434397
- DOI: 10.1016/j.clinph.2010.03.052
The alpha-motoneuron pool as transmitter of rhythmicities in cortical motor drive
Abstract
Objective: Investigate the effectiveness and frequency dependence of central drive transmission via the alpha-motoneuron pool to the muscle.
Methods: We describe a model for the simulation of alpha-motoneuron firing and the EMG signal as response to central drive input. The transfer in the frequency domain is investigated. Coherence between stochastical central input and EMG is also evaluated.
Results: The transmission of central rhythmicities to the EMG signal relates to the spectral content of the latter. Coherence between central input to the alpha-motoneuron pool and the EMG signal is significant whereby the coupling strength hardly depends on the frequency in a range from 1 to 100 Hz. Common central input to pairs of alpha-motoneurons strongly increases the coherence levels. The often-used rectification of the EMG signal introduces a clear frequency dependence.
Conclusions: Oscillatory phenomena are strongly transmitted via the alpha-motoneuron pool. The motoneuron firing frequencies do play a role in the transmission gain, but do not influence the coherence levels. Rectification of the EMG signal enhances the transmission gain, but lowers coherence and introduces a strong frequency dependency. We think that it should be avoided.
Significance: Our findings show that rhythmicities are translated into alpha-motoneuron activity without strong non-linearities.
Copyright 2010 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.
Similar articles
-
Decorrelation of cortical inputs and motoneuron output.J Neurophysiol. 2011 Nov;106(5):2688-97. doi: 10.1152/jn.00336.2011. Epub 2011 Jul 27. J Neurophysiol. 2011. PMID: 21795617
-
Coherence between motor unit discharges in response to shared neural inputs.J Neurosci Methods. 2007 Jul 30;163(2):384-91. doi: 10.1016/j.jneumeth.2007.03.011. Epub 2007 Mar 24. J Neurosci Methods. 2007. PMID: 17482677
-
Synchronization in monkey motor cortex during a precision grip task. II. effect of oscillatory activity on corticospinal output.J Neurophysiol. 2003 Apr;89(4):1941-53. doi: 10.1152/jn.00832.2002. J Neurophysiol. 2003. PMID: 12686573
-
Rhythmical corticomotor communication.Neuroreport. 1999 Feb 5;10(2):R1-10. Neuroreport. 1999. PMID: 10203308 Review.
-
Oscillatory firing of single human sphincteric alpha 2 and alpha 3-motoneurons reflexly activated for the continence of urinary bladder and rectum. Restoration of bladder function in paraplegia.Electromyogr Clin Neurophysiol. 1991 Sep;31(6):323-55. Electromyogr Clin Neurophysiol. 1991. PMID: 1935758 Review.
Cited by
-
Intermuscular coherence between homologous muscles during dynamic and static movement periods of bipedal squatting.J Neurophysiol. 2020 Oct 1;124(4):1045-1055. doi: 10.1152/jn.00231.2020. Epub 2020 Aug 20. J Neurophysiol. 2020. PMID: 32816612 Free PMC article.
-
Abnormal patterns of corticomuscular and intermuscular coherence in childhood dystonia.Clin Neurophysiol. 2020 Apr;131(4):967-977. doi: 10.1016/j.clinph.2020.01.012. Epub 2020 Feb 4. Clin Neurophysiol. 2020. PMID: 32067914 Free PMC article.
-
Amplitude cancellation influences the association between frequency components in the neural drive to muscle and the rectified EMG signal.PLoS Comput Biol. 2019 May 3;15(5):e1006985. doi: 10.1371/journal.pcbi.1006985. eCollection 2019 May. PLoS Comput Biol. 2019. PMID: 31050667 Free PMC article.
-
Coherence of the Surface EMG and Common Synaptic Input to Motor Neurons.Front Hum Neurosci. 2018 Jun 11;12:207. doi: 10.3389/fnhum.2018.00207. eCollection 2018. Front Hum Neurosci. 2018. PMID: 29942254 Free PMC article.
-
Dynamic Increase in Corticomuscular Coherence during Bilateral, Cyclical Ankle Movements.Front Hum Neurosci. 2017 Apr 4;11:155. doi: 10.3389/fnhum.2017.00155. eCollection 2017. Front Hum Neurosci. 2017. PMID: 28420971 Free PMC article.
Publication types
MeSH terms
LinkOut - more resources
Full Text Sources