. Author manuscript; available in PMC: 2014 Jul 1.

Published in final edited form as: Brain Struct Funct. 2012 Jul 5;218(4):913–927. doi: 10.1007/s00429-012-0438-x

Table 2.

Summary of behavioral and immunohistochemical results (group mean ± SEM) for the individual groups in experiment 2

Measure	Group
	Handled	TOY	TO	PIT	PAV	REWARD
Behavior during test	n/a	−0.1 ± 0.5^a	0.2 ± 1.7^b	7.6 ± 1.5^b	3.0 ± 0.6^a	2.8 ± 0.5^c
pERK⁺ cell count CORE	9.6 ± 1.7	15.0 ± 2.9	10.7 ± 2.4	30.3 ± 4.0	39.5 ± 6.9	11.1 ± 2.0
pERK⁺ cell count SHELL	34.2 ± 3.6	36.2 ± 5.7	27.8 ± 5.7	78.8 ± 15.6	52.0 ± 7.9	138.3 ± 16.3
pERK⁺ cell count DMS	n.d.	6.9 ± 2.8	6.5 ± 1.5	9.8 ± 3.5	11.6 ± 5.1	n.d.
pERK⁺ cell count DLS	n.d.	21.0 ± 9.1	16.5 ± 4.5	19.9 ± 4.1	31.2 ± 5.9	n.d.

n/a not applicable, n.d. not determined

Discrimination rate of Pavlovian conditioned response; rate of food cup approaches during the CS minus rate of food cup approaches during the preCS

PIT score; rate of active lever presses during the CS minus rate of active lever presses during the preCS

Food cup approaches during the period of intermittent food delivery (coincident with the CS period for the other groups) minus rate of food cup approaches during a time period equivalent to the preCS period. See text for further details