TY - JOUR
T1 - An animal model for the study of brain transmittor release in response to spinal cord stimulation in the awake, freely moving rat
T2 - preliminary results from the periaqueductal grey matter.
AU - Linderoth, B.
AU - Stiller, C. O.
AU - O'Connor, W. T.
AU - Hammarström, G.
AU - Ungerstedt, U.
AU - Brodin, E.
PY - 1993
Y1 - 1993
N2 - Electrical spinal cord stimulation (SCS) is an important method in the treatment of certain chronic pain syndromes which are difficult to manage with conventional techniques. The indications for this procedure have gradually narrowed to neuropathic pain states, especially those of peripheral origin, ischaemic pain due to peripheral vascular disease, and treatment-resistant angina pectoris. In spite of the clinical use of this method for more than 20 years, the mechanisms underlying the pain alleviating effect remain largely unknown. For the effect on ischaemic pain, recent animal research indicates a mediation via autonomic pathways. Concerning the effect on neuropathic pain progress in knowledge has been scanty. Data from spinal microdialysis in decerebrated or anaesthetized animals indicate the possible importance of serotonin and substance P in the dorsal horn for pain inhibition by SCS. However, data from experiments on anaesthetized animals are, for several reasons, not likely to truely reflect the mechanisms active in conscious humans under treatment with SCS. To avoid the influence of anaesthesia and to approach the clinical situation, we have developed an animal model enabling simultaneous SCS and supraspinal microdialysis in awake, freely moving rats. The animal model is described and some preliminary data indicating a release of gamma-amino butyric acid (GABA) induced by SCS in the periaqueductal grey matter (PAG), are presented.
AB - Electrical spinal cord stimulation (SCS) is an important method in the treatment of certain chronic pain syndromes which are difficult to manage with conventional techniques. The indications for this procedure have gradually narrowed to neuropathic pain states, especially those of peripheral origin, ischaemic pain due to peripheral vascular disease, and treatment-resistant angina pectoris. In spite of the clinical use of this method for more than 20 years, the mechanisms underlying the pain alleviating effect remain largely unknown. For the effect on ischaemic pain, recent animal research indicates a mediation via autonomic pathways. Concerning the effect on neuropathic pain progress in knowledge has been scanty. Data from spinal microdialysis in decerebrated or anaesthetized animals indicate the possible importance of serotonin and substance P in the dorsal horn for pain inhibition by SCS. However, data from experiments on anaesthetized animals are, for several reasons, not likely to truely reflect the mechanisms active in conscious humans under treatment with SCS. To avoid the influence of anaesthesia and to approach the clinical situation, we have developed an animal model enabling simultaneous SCS and supraspinal microdialysis in awake, freely moving rats. The animal model is described and some preliminary data indicating a release of gamma-amino butyric acid (GABA) induced by SCS in the periaqueductal grey matter (PAG), are presented.
UR - http://www.scopus.com/inward/record.url?scp=0027721554&partnerID=8YFLogxK
U2 - 10.1007/978-3-7091-9297-9_36
DO - 10.1007/978-3-7091-9297-9_36
M3 - Article
C2 - 7906475
AN - SCOPUS:0027721554
SN - 0065-1419
VL - 58
SP - 156
EP - 160
JO - Acta neurochirurgica. Supplementum
JF - Acta neurochirurgica. Supplementum
ER -