Abstract
The diagnosis of neuropathic pain is a challenge for physicians.The incompletely understood and complex mechanisms of neuropathic pain contribute to the difficulty. As pain is a subjective experience, there is no test that can assess it.. However various neurophysiological tests can assess the integrity, or lack of thereof, of the somatosensory pathways. Although some tests are used routinely (i.e., the quantitative sensory test and the autonomic testing), others have failed to reach widespread use in clinical practice, although they have provided very interesting data in the research field. This chapter reviews various neurophysiologic techniques used to study the function and dysfunction of the nociceptive system in humans, including quantitative sensory tests (QSTs), autonomic tests, microneurography (MCNG), laser evoked potentials (LEPs) and contact heat evoked potential stimulator (CHEPS).
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