Exist one? Perhaps, Eccentric exercise EMG, cutaneous silent period?
When assessing polyneuropathy normally we check somatosensory by nervous conduction studies (sural pewroneal etc..) fibers. Do you know if afferents from muscle spindles or Golgi Tendon organs could be explore with EMG studies, cutaneous silent period.. or some reflex? I tried before and after eccentric exercise
I recommend one way for examining proprioceptive sense.
First of all, you set special range of joint and then you demand him to cognize the range.
After that, you can demand him moving his joint to setting range and you can confirm the error percent. In that way, you can check his proprioceptive sense. I think so.
I hope that my answer is helpful to you.
Dear Dong-Wook,
Thank you very much for your answer. Yes, it helps a lot. Even so, in my opinion this technique involves joint receptors too. We may check it in total knee protesis operated patients to validate it (operated and not operated knee). I thought in one more specific to muscle spindles afferences.. Maybe these afferences contribute to the onset latency of silent period? cutanoues or mixed.. Thank you. Do you have some refferences for guides joint angle errors. Normal vallues?
Thank you for sharing your opinion. I agree your explanation. After see your opinion, I thought the way for checking of the proprioceptive sense in muscle. I thought that we can use the stretch reflex. H-reflex is not harmonized in your study. But I don't know exactly how to make use of stretch reflex, and how to check differences of change. If you want to use EMG, then I suggest you this way.
After attaching the EMG on a muscle, you perform stretch reflex. And you check interval between muscle activation induced by hitting tendon and by the result of stretch reflex.
This is my opinion which was not used way before. I hope that you apply this concept and develop a more good way.
A alpha sensory fibres of Ia afferent receptors of the muscle spindle can be directly measured by compound (mixed) nerve conduction velocity of the median nerve in the forearm. Stimulation at the wrist and recording at the elbow (Metso et al, Clinical Neurophysiology 2008;119:29-32). Another method is the H-reflex of the tibial or median nerve, but using this you should be sure that the motor nerve fibres (efferent part) are intact. Study of II-afferents of the muscle spindle is more challenging and I do not know any direct and generally accepted neurophysiological method to do this.
@Dear Prof Partanen,
You mean that by mixed nerve nervous conduction studyies we can appreciate 1A afferents from muscle spindles? Is this correct, if I tried to fatigue (eccentric exercise) the wrist flexors which probably contribute to right median mixed nerve at the elbow and compare to left forearm (control). I obtained faster CV on fatigued arm. I did it only once. Maybe, to better analyze the 1B (II afferents) from static nucleus of the muscle spindles we can suggest a paradigm in which proprioception (position task) in one limb may affect the receptors..?
To compare eccentric exercise and position task as suggestet by Mr Dong-Wook Han with ecentric exercise only in different trials? Can we suggest that a sustained position task or eccentric exercise produce differences at spinal level or mixed nerve?
Is this so easy? or near nerve is the rule here? Did I do it wrong?
Ovidiu
(see attached file and link of my blog for CV in median nerve at the elbow fatigued and control)
http://barcelonaneurophysiology.blogspot.com.es/2015/09/muscle-spindles-i-afferents-by-mixed.html
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