title: A critical review of evidence concerning long-loop reflexes excited by muscle afferents in man.
abstract: It is the thesis of this review that the origin of the intercurrent facilitation at 50 to 400 msec in the standard recovery curve of the H reflex, evoked with paired stimuli, is a complex. It is composed importantly of central feedback effects from the conditioning reflex contraction, influences mediated by cutaneous group III afferent nerve fibres excited by the percutaneous stimulus, and with a possible additional modest contribution by long-loop, spino-bulbo-spinal influences.
mesh_terms: D004558:Electric Stimulation; D005071:Evoked Potentials; D005246:Feedback; D006801:Humans; D009119:Muscle Contraction; D009470:Muscle Spindles / Q000502:physiology*; D009475:Neurons, Afferent / Q000502:physiology; D010525:Peripheral Nerves / Q000502:physiology; D012023:Reflex, Monosynaptic; D012867:Skin / Q000294:innervation; D013116:Spinal Cord / Q000502:physiology; D013127:Spinal Nerves / Q000502:physiology