Table 1.

Summary of Social Interaction Anatomy

	Control	Social	F-ratio, p-value, Effect Size
OFC Apical
Branches	22.72±.84	25.48±1.5	F(1,10)=2.59, p=0.14, ${\eta }_p^2=0.21$
Length	61.33±1.66	66.66±4.42	F(1,10)=1.27, p=0.29, ${\eta }_p^2=0.11$
Spine Density	9.28±.047	8.85±0.28	F(1,10)=0.62, p=0.47, ${\eta }_p^2=0.06$
Spine Number	391.02±21.72	470.46±26.91	F(1,10)=5.28, p=0.04+, ${\eta }_p^2=0.345$
OFC Basilar
Branches	36.87±0.45	42.35±1.06	F(1,10)=22.92, p=0.001*, ${\eta }_p^2=0.70$
Length	86.32±1.80	96.78±2.53	F(1,10)=11.33, p=0.007*, ${\eta }_p^2=0.53$
Spine Density	10.94±0.30	9.80±0.24	F(1,10)= 8.88, p=0.014+, ${\eta }_p^2=0.47$
Spine Number	1112±39.06	1122±49.16	F(1,10)= 0.23, p=0.88, ${\eta }_p^2=0.002$
mPFC Apical
Branches	25.29±1.74	25.79±0.30	F(1,10)=0.08, p=0.78, ${\eta }_p^2=0.008$
Length	115.98±7.82	117.84±3.16	F(1,10)=0.05, p=0.83, ${\eta }_p^2=0.005$
Spine Density	4.39±0.22	5.57±0.48	F(1,10)=4.99, p=0.05*, ${\eta }_p^2=0.33$
Spine Number	339.16±39.52	372.56±30.26	F(1,10)=0.45, p=0.52, ${\eta }_p^2=0.043$
mPFC Basilar
Branches	41.85±0.76	42.69±1.12	F(1,10)=0.38, p=0.55, ${\eta }_p^2=0.04$
Length	130.63±8.19	145.30±4.0	F(1,10)=2.59, p=0.14, ${\eta }_p^2=0.21$
Spine Density	6.45±0.26	6.91±0.33	F(1,10)=1.18, p=0.30, ${\eta }_p^2=0.11$
Spine Number	785.75±49.29	724.07±41.19	F(1,10)=0.92, p=0.36, ${\eta }_p^2=0.08$

Values represent mean±SEM for measures of total branch counts (Branches), total dendritic length (Length mm), spine density per 10μm , and total spine number estimated on third order branches in the Apical and Basilar dendritic fields for each brain Control (n=6) and Social (n=6) groups of Experiment 1. Values are means of 10 observations per brain (5 per hemisphere). Test statistics, p values, and effect sizes were obtained from ANOVA with group as a single factor.

^*Social>Control;

⁺Control>Social