Cortical arousal and autonomic regulation: The role of cold vs tepid caffeinated beverages during prolonged orthostasis

Figure 1 Modulatory effects of cold caffeinated beverage ingestion and orthostasis on cortical electrical activity (alpha/beta waves) and pulse rate. A: The modulatory roles of ingestion of cold caffeinated beverage during orthostasis on alpha wave frequency; B: The modulatory roles of ingestion of cold caffeinated beverage during orthostasis on beta wave frequency; C: The modulatory roles of ingestion of cold caffeinated beverage during orthostasis on the alpha/beta ratio during orthostasis; D: The modulatory roles of ingestion of cold caffeinated beverage on pulse rate during orthostasis. ^aP < 0.05, baseline vs other groups; ^bP < 0.05, orthostasis vs other groups; ^cP < 0.05, cold caffeinated beverage vs tepid caffeinated beverage; ^dP < 0.05, orthostasis + tepid caffeinate beverage vs orthostasis + cold caffeinated beverage; ^eP < 0.05, tepid caffeinated beverage vs orthostasis + tepid caffeinate beverage; ^fP < 0.05, cold caffeinated beverage vs orthostasis + tepid caffeinate beverage. Ortho: Orthostasis; BPM: Beats per minute.