Table 2.

Mean surface area, grey and white matter volumes for the left and right hemispheres in male and females chimpanzees

	Males	Females	Total
Grey matter
LH	93.73 (1.94)	83.50 (1.35)	88.62 (1.18)
RH	99.34 (0.178)	89.42 (1.24)	94.38 (1.08)
White matter
LH	73.15 (1.56)	72.14 (1.07)	72.65 (1.37)
RH	72.67 (1.55)	70.64 (1.07)	71.65 (1.31)
Surface area
LH	187.96 (2.45)	178.05 (1.69)	183.00 (1.49)
RH	187.43 (2.45)	176.52 (1.74)	181.98 (1.53)

Surface area, grey and white matter volumes are in cubic centimeters. Numbers in the parentheses are SEs.