History of research on touch / Joseph C. Stevens and Barry G. Green -- The psychophysics of tactile perception and its peripheral physiological basis / Joel D. Greenspan and Stanley J. Bolanowski -- Somatosensory cortex and tactile perceptions / Harold Burton and Robert Sinclair -- Nociception and pain : evolution of concepts and observations / Edward R. Perl and Lawrence Kruger -- Afferent mechanisms of pain / Bruce Lynn and Edward R. Perl -- Measurement of pain sensation / Richard H. Gracely and Bruce D. Naliboff -- Pathological pain / C. Richard Chapman and Mark Stillman -- Control of pathological pain / Russell K. Portenoy.