Hi Physiobob,

interested by your comment on SLR, particularly the specific value of 30 degrees to validate discal involvement. Have you got the references for this value? I presume this would only be valid for discal impingement on the nerve? In this case the degree of impingement is often affected by spinal posture or loading, therefore the 30 degree value would have to be standardised for replication clinically. Additionally, the neural sensitisation that occurs with disc prolapse may also be due to the release of inflammatory mediators from the disc, in which case surely the range in which the SLR becomes symptomatic becomes a combination of degree of sensitivity, current emotional and cognitive amongst others. Would you agree with this or am I off the mark with these assumptions?

Best Regards

Craig