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(Kohnstamm phenomenon)
17 results
  • Tonic and Rhythmic Spinal Activity Underlying Locomotion. [Review]
    Curr Pharm Des 2017; 23(12):1753-1763Ivanenko YP, Gurfinkel VS, … Lacquaniti F
  • In recent years, many researches put significant efforts into understanding and assessing the functional state of the spinal locomotor circuits in humans. Various techniques have been developed to stimulate the spinal cord circuitries, which may include both diffuse and quite specific tuning effects. Overall, the findings indicate that tonic and rhythmic spinal activity control are not separate p…
  • Voluntary motor commands reveal awareness and control of involuntary movement. [Journal Article]
    Cognition 2016; 155:155-167De Havas J, Ghosh A, … Haggard P
  • The capacity to inhibit actions is central to voluntary motor control. However, the control mechanisms and subjective experience involved in voluntarily stopping an involuntary movement remain poorly understood. Here we examined, in humans, the voluntary inhibition of the Kohnstamm phenomenon, in which sustained voluntary contraction of shoulder abductors is followed by involuntary arm raising. P…
  • Human cervical spinal cord circuitry activated by tonic input can generate rhythmic arm movements. [Journal Article]
    J Neurophysiol 2016; 115(2):1018-30Solopova IA, Selionov VA, … Ivanenko Y
  • The coordination between arms and legs during human locomotion shares many features with that in quadrupeds, yet there is limited evidence for the central pattern generator for the upper limbs in humans. Here we investigated whether different types of tonic stimulation, previously used for eliciting stepping-like leg movements, may evoke nonvoluntary rhythmic arm movements. Twenty healthy subject…
  • Sensorimotor organization of a sustained involuntary movement. [Journal Article]
    Front Behav Neurosci 2015; 9:185De Havas J, Ghosh A, … Haggard P
  • Involuntary movements share much of the motor control circuitry used for voluntary movement, yet the two can be easily distinguished. The Kohnstamm phenomenon (where a sustained, hard push produces subsequent involuntary arm raising) is a useful experimental model for exploring differences between voluntary and involuntary movement. Both central and peripheral accounts have been proposed, but lit…
  • The role of head position and prior contraction in manual aiming. [Journal Article]
    Acta Psychol (Amst) 2015; 154:10-3Sidaway B, Bonenfant D, … Anderson D
  • We sought to determine if the asymmetrical tonic neck reflex influences the accuracy of self-selected arm positioning without vision and to ascertain if such accuracy is influenced by a pre-contraction of the prime movers. Participants reproduced an arm position using their abductors with the head in midline, rotated towards and away from the arm. Arm movements were made with and without a pre-co…
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