TY - JOUR
T1 - Examining sympathetic nerve activity with microneurography during hypnosis
T2 - Untangling the effects of central command
AU - Robinson, Richard C.
AU - Crasilneck, Harold
AU - Garofalo, J. P.
AU - Whitfill, Travis
N1 - Funding Information:
Manuscript submitted August 3, 2005; final revision received February 8, 2006. 1This research was supported in part by AHA — Texas Grant No. 0265242Y. 2Address correspondence to Richard C. Robinson, Baylor University Medical Center, 3600 Gaston Avenue, Wadley Tower #360, Dallas, TX 75246, USA. E-mail: RichardR@ BaylorHealth.edu
PY - 2006/12/1
Y1 - 2006/12/1
N2 - Using microelectrode recordings of postganglionic sympatheticaction potentials, the authors studied the effects of hypnotic suggestion on sympathetic outflow targeted to skin during static handgrip exercise. All subjects performed sustained handgrip at 33% maximal voluntary contraction (MVC) for 2 minutes during 3 consecutive trials. Two subjects randomly assigned to a hypnosis condition received suggestions that the 2nd trial was more difficult and the last trial was less difficult than the first trial. Two subjects randomly assigned to the control condition received no hypnosis or suggestions about task difficulty. In the nonhypnosis condition, skin sympathetic nerve activity (SNA) increased by 6% from baseline during the 2nd trial and 13% from baseline during the 3rd trial. In the hypnosis condition, skin SNA increased by 25% during the 2nd trial (suggestion of increased difficulty) and returned to baseline during the 3rd condition (suggestion of decreased difficulty). Therefore, the impact of central command on skin SNA is suggested by these results.
AB - Using microelectrode recordings of postganglionic sympatheticaction potentials, the authors studied the effects of hypnotic suggestion on sympathetic outflow targeted to skin during static handgrip exercise. All subjects performed sustained handgrip at 33% maximal voluntary contraction (MVC) for 2 minutes during 3 consecutive trials. Two subjects randomly assigned to a hypnosis condition received suggestions that the 2nd trial was more difficult and the last trial was less difficult than the first trial. Two subjects randomly assigned to the control condition received no hypnosis or suggestions about task difficulty. In the nonhypnosis condition, skin sympathetic nerve activity (SNA) increased by 6% from baseline during the 2nd trial and 13% from baseline during the 3rd trial. In the hypnosis condition, skin SNA increased by 25% during the 2nd trial (suggestion of increased difficulty) and returned to baseline during the 3rd condition (suggestion of decreased difficulty). Therefore, the impact of central command on skin SNA is suggested by these results.
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U2 - 10.1080/00207140600860675
DO - 10.1080/00207140600860675
M3 - Article
C2 - 16950686
AN - SCOPUS:33748459599
SN - 0020-7144
VL - 54
SP - 448
EP - 456
JO - International Journal of Clinical and Experimental Hypnosis
JF - International Journal of Clinical and Experimental Hypnosis
IS - 4
ER -