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- Steven L Jinks, Jason Andrada, and Omar Satter.
- Department of Anesthesiology and Pain Medicine, University of California, Davis, California 95616, USA. sljinks@ucdavis.edu
- Neuroreport. 2011 Sep 14; 22 (13): 655-9.
AbstractGeneral anesthetic mechanisms are poorly understood. Anesthetic immobilizing effects occur in the spinal ventral horn. However, a detailed analysis of anesthetic effects on ventral motor networks is lacking. We delivered isoflurane, desflurane, or propofol during NMDA/5-HT-induced, or noxious tail stimulus-evoked, fictive locomotion in neonatal rat isolated spinal cords. Anesthetics changed the frequency, amplitude, and regularity of fictive locomotion with little effect on phase-lag. Isoflurane abolished pharmacologically-induced versus noxious stimulus-induced motor output at similar concentrations. Propofol abolished pharmacologically-induced fictive locomotion through a γ-aminobutyric acid type A-receptor mechanism. Anesthetic effects on pharmacologically-elicted fictive locomotion appear clinically-relevant, and support a ventral horn immobilizing effect on locomotor rhythm generation.2011 Wolters Kluwer Health | Lippincott Williams & Wilkins.
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