ASIC1a 1 Article 1 acid sensing ion channel 1 acid-sensing ion channel 1 acidosis 1 animal experiment 1 carbon dioxide 1 carbon dioxide breathing controlled study 1 exposure 1 fear 1 fear memory 1 female 1 male 1 memory 1 mouse 1 nonhuman 1 novel object recognition (NOR) 1 pH 1 physiological stress 1 recall 1 recognition index 1