TABLE 3.

Association (Spearman correlations) between fear conditioning (1–4 refers to trial number) and sphingolipid group levels in the standard exposure experiment ^a .

	Sphinganine	Ceramides	Sphingomyelin	Glycos. Ceramides	Total
Acquired Fear Response b :
Baseline freeze	−0.113	−0.138	−0.073	−0.073	−0.104
Baseline motion	−0.085	+0.151	+0.023	+0.106	+0.005
Tone freeze 1	−0.047	+0.069	+0.035	+0.228	−0.042
Tone freeze 2	−0.312	+0.147	+0.165	−0.028	−0.165
Tone freeze 3	−0.058	+0.274	+0.320*	−0.035	+0.122
Tone freeze 4	−0.087	+0.112	+0.064	−0.144	−0.097
Shock motion 1	−0.037	+0.031	+0.185	−0.199	−0.090
Shock motion 2	+0.004	−0.030	+0.072	−0.310+	−0.057
Shock motion 3	+0.197	+0.050	+0.123	−0.199	+0.106
Shock motion 4	+0.132	−0.014	+0.098	−0.123	+0.049
Interval freeze 12	−0.198	+0.408**	+0.269	+0.074	−0.003
Interval freeze 23	−0.352*	+0.259	+0.134	−0.033	−0.230
Interval freeze 34	−0.375*	+0.226	+0.147	−0.125	−0.226
Contextual Fear Response
Freeze (% time)	+0.015	+0.088	+0.017	−0.041	−0.091
Cued Fear Response
Baseline Freeze	+0.160	+0.304*	+0.322*	+0.071	+0.170
Tone Freeze	+0.031	+0.256	+0.334*	−0.029	+0.158
Baseline Freeze (%)	+0.011	+0.446**	+0.369*	+0.318*	+0.214
Tone Freeze (%)	+0.091	+0.065	+0.237	−0.202	+0.153

^aSignificant effects are indicated in bold.

^bFreeze is expressed in seconds per minute, freeze (%) refers to % of time frozen, motion is expressed in cm. 0.05 > P > 0.01, *; 0.01 > P > 0.001, **; P < 0.001, ***