"The average number of neocortical neurons was 19 billion in female brains and 23 billion in male brains, a 16% difference. Sex and age were the main determinants of the total number of neurons in the human cortex, whereas body size per se had no influence on neuron number."

This interesting new study in Evolutionary Cognitive Neuroscience is RELEVANT TO MENSRIGHTS.

To defend the point of view of those among us that see males and females as intrinsically different human beings hence the solution to gender problems cannot be solved by crippling males with feminist rules.

Evolutionary Cognitive Neuroscience. Page 139.

Studies using MRI have also confirmed the sex difference in adult brain size (Gur et al., 1991; Harvey, Persaud, Ron, Baker, & Murray, 1994; Reiss et al., 1996; Willerman et al., 1991). Thus, Ivanovich et al. (2004) carried out a study that controlled for body size in 96 18-year-old male and female high school graduates in Chile and found that:

• the males averaged 1,480 cm3 (SD = 125) before body size adjustments and 1,470 cm3 (SD = 40) after adjustments,

• while the females averaged 1,394 cm3 (SD = 89) before and 1,404 cm3 (SD = 37) after adjustments.

A stereological investigation by Pakkenberg and Gundersen (1997) found that men had about 4 billion more cortical neurons than did women, and this was not accounted for by differences in height. The average number of neocortical neurons was 19 billion in female brains and 23 billion in male brains, a 16% difference. In their study, which covered the age range from 20 years to 90 years, approximately 10% of all neocortical neurons were lost over the life span in both sexes.

Sex and age were the main determinants of the total number of neurons in the human cortex, whereas body size per se had no influence on neuron number.