For more than
10 years physiotherapy researchers such as David Butler, Louis Gifford, Lorimer Moseley, and Michael Thacker, perhaps influenced by the intellectual courage of pain neuroscientist Patrick Wall, have encouraged physiotherapists to adopt a new paradigm for understanding pain. The tissue-injury model becomes redundant when we consider situations where pain is experienced in the absence of tissue damage, or when an individual does not perceive pain despite frank tissue damage. A paradigm that emphasises neural structure and function learn more is overwhelmingly supported by 21st century pain neuroscience and the myriad of clinical presentations of patients suffering pain. This model does not ignore tissue-based pathology but accepts that nociception associated with tissue damage is modifiable at the periphery, at selleck the spinal cord and in the brain. Major advances have been made in our understanding of pain in the past 40 years. The historic gate control theory was a key development in the understanding of pain as a multidimensional experience.
It revealed that not only are afferent nerve impulses modulated in the spinal cord, but also that it is possible for regions of the brain that regulate attention, emotion, and memory to exert control over sensory input (Melzack and Wall 1965). Transcutaneous electrical nerve stimulation (TENS) has subsequently been used by physiotherapists to modify the pain experience. Physiotherapists may give a variety of responses if asked how TENS modifies the pain experience. A common response might be that by stimulating the large A-beta mechanosensory fibres, nociceptor transmission Metalloexopeptidase is inhibited at the dorsal horn of the spinal cord. A more thorough explanation might include that the prolonged stimulation by TENS causes the release of endorphins, resulting in a systemic analgesic effect (Watson 2008). An additional explanation is that if the person is given control of the TENS unit, this will increase their perceived control of their pain, reduce the threat value of pain, and modulate their pain experience. Indeed, from
our current understanding of pain neuroscience, this may be the most important mechanism of pain modification that TENS offers. Although we hope all physiotherapists would respond with all this information, we recognise that this may not be the case. Research using the Pain Education Survey suggests that physiotherapy programs have a greater amount of pain education than other health professions. In the UK, the median amount of pain education for all health disciplines is 12 hours (range 2–158) but physiotherapists have 38 hours (range 5–158), three times that of medical students (Briggs et al 2011). Similarly, in Canada, physiotherapists receive an average of 41 hours (range 18–69) of pain education, compared with 16 hours (range 0–38) in medicine (Watt-Watson et al 2009).
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