Prenatal iron deficiency and monoamine oxidase A (MAOA) polymorphisms: combined risk for later cognitive performance in rhesus monkeys

Table 2 Pharmacological response of the dopamine system

	Hi-MAOA		Low-MAOA
	IS	ID	IS	ID
Vehicle session: reinforcements*	9.1 ± 0.1^a	9.3 ± 0.2	9.3 ± 0.2	8.0 ± 0.7**
Vehicle session: responses	184 ± 37	175 ± 20	181 ± 38	87 ± 8
Haloperidol session: change in number of responses	−163 ± 48	−151 ± 31	−141 ± 48	−1 ± 29
Haloperidol + apomorphine: change in number of responses***	−149 ± 51	−79 ± 21	−124 ± 32	−67 ± 26

ISSN: 1865-3499