S. Attarian, J. P. Vedel, J. Pouget, and A. Schmied, Cortical versus spinal dysfunction in amyotrophic lateral sclerosis, Muscle & Nerve, vol.49, issue.5, pp.677-690, 2006.
DOI : 10.1002/mus.20519

S. Attarian, J. P. Vedel, J. Pouget, and A. Schmied, Progression of cortical and spinal dysfunctions over time in amyotrophic lateral sclerosis, Muscle & Nerve, vol.249, issue.3, pp.364-375, 2008.
DOI : 10.1002/mus.20942

F. Baldissera, P. Campadelli, and L. Piccinelli, Neural encoding of input transients investigated by intracellular injection of ramp currents in cat ??-motoneurones, The Journal of Physiology, vol.328, issue.1, pp.73-86, 1982.
DOI : 10.1113/jphysiol.1982.sp014253

P. Bawa, C. , and B. , Repetitive doublets in human flexor carpi radialis muscle., The Journal of Physiology, vol.339, issue.1, pp.123-132, 1983.
DOI : 10.1113/jphysiol.1983.sp014707

P. N. Bawa, K. E. Jones, and R. B. Stein, Assessment of size ordered recruitment, Frontiers in Human Neuroscience, vol.53, 2014.
DOI : 10.1098/rsbl.2008.0459

W. H. Calvin, K. Stein, R. Pearson, J. Smith, and . Redford, A Third Mode of Repetitive Firing: Self-Regenerative Firing Due to Large Delayed Depolarizations, Control of Posture and Locomotion, pp.173-178, 1973.
DOI : 10.1007/978-1-4613-4547-3_14

J. Dean, J. Clair-auger, O. Lagerquist, C. , and D. , Asynchronous recruitment of low-threshold motor units during repetitive, low-current stimulation of the human tibial nerve, Frontiers in Human Neuroscience, vol.111, 2014.
DOI : 10.1152/jn.00469.2013

D. Carvalho, M. Eisen, A. Krieger, C. Swash, and M. , Motoneuron firing in amyotrophic lateral sclerosis (ALS), Frontiers in Human Neuroscience, vol.74, issue.e34640, 2014.
DOI : 10.1016/0304-3940(87)90051-6

J. Duchateau and S. Baudry, Maximal discharge rate of motor units determines the maximal rate of force development during ballistic contractions in human, Frontiers in Human Neuroscience, vol.513, issue.75, 2014.
DOI : 10.1111/j.1469-7793.1998.295by.x

S. J. Garland, C. L. Pollock, and T. D. Ivanova, Could motor unit control strategies be partially preserved after stroke?, Frontiers in Human Neuroscience, vol.54, 2014.
DOI : 10.1016/0022-510X(82)90203-9

E. Henneman, Relation between Size of Neurons and Their Susceptibility to Discharge, Science, vol.126, issue.3287, pp.1345-1347, 1957.
DOI : 10.1126/science.126.3287.1345

E. Henneman, H. P. Clamann, J. D. Gillies, and R. D. Skinner, Rank order of motoneurons within a pool: law of combination, J. Neurophysiol, vol.37, pp.1338-1349, 1974.

X. Hu, W. Z. Rymer, and N. L. Suresh, Control of motor unit firing during step-like increases in voluntary force, Frontiers in Human Neuroscience, vol.40, issue.026015, 2014.
DOI : 10.1016/0014-4886(73)90111-8

J. Kallio, K. Søgaard, J. Avela, P. V. Komi, H. Selänne et al., Differences between young and elderly in soleus motor unit discharge rate in dynamic movements, Front. Hum. Neurosci, 2014.

D. Kernell, The Delayed Depolarization in Cat and Rat Motoneurones, Progress in Brain Research, pp.42-52, 1964.
DOI : 10.1016/S0079-6123(08)60616-0

L. Kudina and R. Andreeva, Repetitive doublet firing of motor units: evidence for plateau potentials in human motoneurones?, Experimental Brain Research, vol.120, issue.1, pp.79-90, 2010.
DOI : 10.1007/s00221-010-2298-z

L. P. Kudina and R. E. Andreeva, Delayed depolarization and firing behavior of human motoneurons during voluntary muscle contractions, Frontiers in Human Neuroscience, vol.7, 2013.
DOI : 10.3389/fnhum.2013.00793

L. P. Kudina and R. E. Andreeva, Excitability properties of single human motor axons: are all axons identical?, Frontiers in Cellular Neuroscience, vol.507, 2014.
DOI : 10.1111/j.1469-7793.1998.919bs.x

C. Lorenz and K. E. Jones, I H activity is increased in populations of slow versus fast motor axons of the rat, Front. Hum. Neurosci, 2014.

C. J. Mcneil, J. E. Butler, J. L. Taylor, and S. C. Gandevia, Testing the excitability of human motoneurones, Front. Hum. Neurosci, 2013.

P. A. Mcnulty, G. G. Lin, and C. G. Doust, Single motor unit firing rate after stroke is higher on the less-affected side during stable low-level voluntary contractions, Frontiers in Human Neuroscience, vol.8, 2014.
DOI : 10.1371/journal.pone.0052228

H. S. Milner-brown, R. B. Stein, Y. , and R. , Changes in firing rate of human motor units during linearly changing voluntary contractions, The Journal of Physiology, vol.230, issue.2, pp.371-390, 1973.
DOI : 10.1113/jphysiol.1973.sp010193

M. Piotrkiewicz and B. Kuraszkiewicz, Double discharges and afterhyperpolarization in human motoneurons, Front. Hum. Neurosci, 2014.

M. Piotrkiewicz, O. Sebik, E. Binboga, D. Mlozniak, B. Kuraszkiewicz et al., Double discharges in human soleus muscle, Frontiers in Human Neuroscience, vol.7, 2013.
DOI : 10.3389/fnhum.2013.00843

A. Schmied, R. Forget, and J. Vedel, Motor unit firing pattern, synchrony and coherence in a deafferented patient, Frontiers in Human Neuroscience, vol.18, issue.2, 2014.
DOI : 10.1113/jphysiol.2011.211045
URL : https://hal.archives-ouvertes.fr/hal-01244942

A. Schmied, J. Pouget, and J. P. Vedel, Electromechanical coupling and synchronous firing of single wrist extensor motor units in sporadic amyotrophic lateral sclerosis, Clinical Neurophysiology, vol.110, issue.5, pp.960-974, 1999.
DOI : 10.1016/S1388-2457(99)00032-2

C. S. Sherrington, Correlation of reflexes and the principle of the common path, British Association for the Advancement of Science, Section I-Physiology, pp.728-740, 1904.

J. L. Smith, B. Betts, V. R. Edgerton, and R. F. Zernicke, Rapid ankle extension during paw shakes: selective recruitment of fast ankle extensors, J. Neurophysiol, vol.43, pp.612-620, 1980.

K. Søgaard, H. B. Olsen, A. K. Blangsted, and G. Sjogaard, Single motor unit firing behaviour in the right trapezius muscle during rapid movement of right or left index finger, Front. Hum. Neurosci, 2014.

I. Zijdewind, R. Bakels, T. , and C. K. , Motor unit firing rates during spasms in thenar muscles of spinal cord injured subjects, Frontiers in Human Neuroscience, vol.590, 2014.
DOI : 10.1113/jphysiol.2011.220103