title: Arousal-induced increase of cortical [K+] in unrestrained rats.
abstract: Changes of extracellular concentration of brain potassium [K+]e were studied in lightly anesthetized unrestrained rats with ion-selective K+-microelectrodes introduced into the cerebral cortex with a head-mounted microdrive system. Nociceptive stimuli elicited EEG arousal lasting for 47 sec on the averag which was accompained by an increase of [K+]e from 3.0 mM to 3.31 +/- 0.04 mM.
mesh_terms: D000818:Animals; D001143:Arousal; D002540:Cerebral Cortex / Q000378:metabolism*; D004558:Electric Stimulation; D008722:Methods; D008839:Microelectrodes; D011188:Potassium / Q000378:metabolism*; D051381:Rats
chemical_list: D011188:Potassium