FRAG 176-191 Figure options Pattern specificity encoded

Another possibility for the pattern dependence of LTD following hypercapnia is that episodic hypercapnia elicits both a norepinephrine-dependent LTD and a serotonin-dependent LTF (Kinkead et al., 2001). In this sense, the serotonergic and noradrenergic systems may interact in a ‘push-pull’ manner