“…The biological approach to panic disorder and agoraphobia bases its theoretical claims on four major groups of empirical findings: (1) Studies indicating that patients with panic disorder and agoraphobia suffer from structural brain abnormalities, such as in the temporal lobe, the basal ganglia, the cingulate, and the brainstem (Asami et al, 2008;Barlow, 2004;Ham et al, 2007;Han et al, 2008;Lee et al, 2006;Stein, 2008); (2) Studies showing that genetics play a significant role in the etiology of panic disorder and agoraphobia (Chantarujikapong et al, 2001;Hettema, Neale, & Kendler, 2001;Kendler et al, 1999;Kendler et al, 2001;Nocon et al, 2008;Stein, 2008); (3) Findings obtained using the paradigm of the biological challenge, whereby panic attacks can be experimentally induced in panic disorder patients using a variety of chemical substances (e.g., sodium lactate infusion and CO 2 inhalation; see Abrams, Schruers, Cosci, & Sawtell, 2008;Barlow, 2004); (4) Research demonstrating that drug therapy is an effective intervention in the treatment of these disorders (Furukawa, Watanabe, & Churchill, 2006;Mavissakalian & Ryan, 1998;Westenberg, 1996).…”