A group of visiting researchers, Hayato Shigeto, of the Neurorehabilitation Research Center, Kio University, revealed that the effects of pain intensity and site on muscle activity distribution differ depending on the nature of the pain.
In patients with chronic low back pain, it has been reported that pain increases or weakens the muscle activity of the lower back (back muscle group) when the trunk is extended from a standing flexion state (raising the body from a bowed state). ..Thus, pain alters muscle activity, but the nature and intensity of pain and how the site affects muscle activity have not been clarified so far.
Therefore, this group examined the relationship between the nature, intensity, and site of pain and the distribution of muscle activity in patients with chronic low back pain.
As a result, it was found that in the case of "neuropathic pain" and "pain caused by light touch", the muscle activity of the back muscle group when extending from the trunk flexion position is suppressed as the pain intensity increases.In addition, when the intensity of "intermittent pain", "skinning pain", "cracking pain", "pain like torture", and "pain caused by light touch" increases, the area around the painful part It was found that the muscle activity of was suppressed.That is, it can be said that exercise adaptation that suppresses muscle activity near the pain site as the pain intensity increases depends on the nature of the pain.
From this study, it was found that the change in muscle activity distribution depending on the pain intensity and site differs depending on the nature of pain, and it is suggested that it is necessary to grasp the relationship between pain and motor control while paying attention to the nature of pain in the future. rice field.Therefore, this group aims to elucidate the mechanism of motor control in patients with chronic low back pain.
