Table 1.

Timeline of testing prepulse inhibition (PPI) behavior in ApoER2 and VLDLR wildtype, heterozygous and homozygous mutant mice. Animals were tested at different stages of development and using different PPI protocols.

Postnatal Day	PPI Protocol	# ApoER2 mice	# VLDLR mice
40	Unimodal acoustic PPI	22 WT, 31 HT, 26 KO	22 WT, 56 HT, 39 KO
80	Unimodal acoustic PPI	22 WT, 31 HT, 26 KO	22 WT, 55 HT, 39 KO
90	Crossmodal PPI (acoustic and tactile stimuli)	22 WT, 31 HT, 26 KO	22 WT, 55 HT, 39 KO
120–150	PCP challenge (10, 15, 20 mg/kg or vehicle)	22 WT, 31 HT, 26 KO	19 WT, 26 HT, 27 KO

PCP = phencyclidine; WT = wildtype; HT = heterozygous; KO = knockout.