Table 3. Summary of the main findings of the study, categorized by common and differential effects. Effects on behavior relate to subjects with remitted depression only.

	Common effects	Differential effects
		TD>CD	CD>TD
Behavior	Global HAMD Global MADRS Global BAI	Depressed mood Sadness	Work and activities Concentration difficulties Lassitude
Cerebral glucose metabolism	Whole brain Ventral striatum Medial thalamus, right OFC, left	Pregenual PFC, right Ventrolateral PFC, left PCC, right OFC	Anterior PFC, left Subgenual PFC, right

Abbreviations: BAI, Beck Anxiety Inventory; CD, catecholamine depletion; HAMD, Hamilton Depression Scale; MADRS, Montgomery–Åsberg Depression Rating Scale; OFC, orbitofrontal cortex; PCC, posterior cingulate cortex; PFC, prefrontal cortex; TD, tryptophan depletion.