Table 2.

Mean Ab Plaque Density Expressed as Percentage Area of Ab Immunostaining in Male and Female Rats in the Sham, rTBI24, and rTBI72 Groups

	Sham		rTBI24		rTBI72
	Male	Female	Male	Female	Male	Female
Hippocampus	1.12% (1.18)	1.11% (0.59)	2.06% (0.78)	2.44% (0.68)	1.07% (0.28)	0.82% (0.31)
Septum	0.18% (0.22)	0.09% (0.10)	0.15% (0.15)	0.35% (0.40)	0.02% (0.04)	0.07% (0.07)
Frontal Ctx	0.19% (0.17)	0.04% (0.03)	0.22% (0.22)	0.08% (0.09)	0.02% (0.02)	0.06% (0.08)
Retrosplenial Ctx	0.12% (0.13)	0.06% (0.08)	0.18% (0.10)	0.45% (0.52)	0.01% (0.03)	0.01% (0.02)
Parietal Ctx	0.10% (0.12)	0.02% (0.01)	0.15% (0.15)	0.11% (0.10)	0.01% (0.01)	0.01% (0.01)
Entorhinal Ctx	0.19% (0.18)	0.10% (0.06)	0.26% (0.23)	0.26% (0.20)	0.08% (0.09)	0.15% (0.15)

Parentheses denote standard deviations.

Ab, β-amyloid; rTBI, repetitive mild traumatic brain injury; Ctx, cortex.