Penza CW, et al. – The clinicians compared the immediate change in temporal summation of heat pain (TSP) between spinal manipulation (SMT) and spinal mobilization (MOB) in healthy volunteers. These data proposed that compared to no treatment, lumbar manual therapies of different velocities produced a similar localized attenuation of TSP. In pain–free individuals who demonstrated an inhibitory TSP response, attenuation of localized pain facilitatory processes by manual therapies was greatest.