ArticleThe Journal of physiology2000
Distinctive patterns of static and dynamic gamma motor activity during locomotion in the decerebrate cat.
Article in The Journal of physiology, 2000. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.
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Who cites it
22 citing papers in PubMed.
- Control of limb loading during active horizontal perturbations at moderate and fast trots in rats.Scientific reports · 2025Article
- Muscle spindles provide flexible sensory feedback for movement sequences.Cell reports · 2025Article
- Measurement of stretch-evoked brainstem function using fMRI.Scientific reports · 2021Article
- Physiological tremor increases when skeletal muscle is shortened: implications for fusimotor control.The Journal of physiology · 2017Article
- Neural computational modeling reveals a major role of corticospinal gating of central oscillations in the generation of essential tremor.Neural regeneration research · 2017Article
- Modulation of gamma and alpha spinal motor neurons activity by trans-spinal direct current stimulation: effects on reflexive actions and locomotor activity.Physiological reports · 2016Article
- Muscle spindle and fusimotor activity in locomotion.Journal of anatomy · 2015Review
- Coordinated alpha and gamma control of muscles and spindles in movement and posture.Frontiers in computational neuroscience · 2015Article
- Human muscle spindle sensitivity reflects the balance of activity between antagonistic muscles.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2014Article
- Model-based prediction of fusimotor activity and its effect on muscle spindle activity during voluntary wrist movements.Journal of computational neuroscience · 2014Article
- Corticomuscular transmission of tremor signals by propriospinal neurons in Parkinson's disease.PloS one · 2013Article
- Fusimotor control of spindle sensitivity regulates central and peripheral coding of joint angles.Frontiers in computational neuroscience · 2012Article
- Stretch reflexes and joint dynamics in rheumatoid arthritis.Experimental brain research · 2010Article
- Pax7 shows higher satellite cell frequencies and concentrations within intrafusal fibers of muscle spindles.The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society · 2008Article
- Changes in human muscle spindle sensitivity during a proprioceptive attention task.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2007Article
- Static and dynamic gamma-motor output to ankle flexor muscles during locomotion in the decerebrate cat.The Journal of physiology · 2006Article
- Parallel reflex pathways from flexor muscle afferents evoking resetting and flexion enhancement during fictive locomotion and scratch in the cat.The Journal of physiology · 2005Article
- Staining of human thyroarytenoid muscle with myosin antibodies reveals some unique extrafusal fibers, but no muscle spindles.Journal of voice : official journal of the Voice Foundation · 2003Article
- Static gamma-motoneurones couple group Ia and II afferents of single muscle spindles in anaesthetised and decerebrate cats.The Journal of physiology · 2002Article
- Toe flexor muscle spindle discharge and stretch modulation during locomotor activity in the decerebrate cat.The Journal of physiology · 2002Article
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4 authors.
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No grant is acknowledged in the PubMed record.
Abstract
Simultaneous recordings were made from gamma (gamma) motor axons and from muscle spindle afferents of the medial gastrocnemius (MG) muscle during locomotion in decerebrate cats. The gamma-neurons were identified as static or dynamic (gammas or gammad) by correlating their behaviour during midbrain stimulation with changes in muscle spindle afferent responses to muscle stretch. On the basis of their behaviour during locomotion, gammas neurons could be divided into two groups. One group (type-1) showed strongly and smoothly modulated discharge increasing in parallel with the active muscle shortening in ankle extension, but with phase advance. The other group (type-2) also showed a modulated pattern, but with increased firing centred on the flexion phase. The proportions of the two were 13 type-1 and 7 type-2. The type-1 firing pattern accurately predicted the difference in firing frequency for secondary afferents obtained by subtracting from the recordings made during active movements the response of the same units to the movements repeated passively in the absence of fusimotor activity. The type-2 pattern also became consistent with the difference signal, when operated on by a phase lag appropriate to the effects of bag2 intrafusal fibres. These results suggest that there may be some degree of separate control of chain and bag2 intrafusal fibres. The discharge of gammad axons was also found to fluctuate with the locomotor cycle, with a pattern very distinct from that of the gammas records. The gammad firing frequency rose very suddenly from zero to a maximum at the onset of muscle shortening and continued into the beginning of lengthening. The term 'interrupted' discharge is suggested as a useful description. The timing of this discharge was shown to be appropriate for sensitising the primary afferents to detect the onset of stretch.
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