Brain development in the absence of fathers

The Wall St Journal has an interesting article about research into the brain development of degu pups that are raised without fathers. These relatives of chinchillas are apparently normally raised by both parents. When the father is taken out of the equation the neurones develop differently.

When deprived of their father, the degu pups exhibit both short- and long-term changes in nerve-cell growth in different regions of the brain. Dr. Braun, director of the Institute of Biology at Otto von Guericke University in Magdeburg, and her colleagues are also looking at how these physical changes affect offspring behavior.

Their preliminary analysis indicates that fatherless degu pups exhibit more aggressive and impulsive behavior than pups raised by two parents...

...Of course, the frontal cortex—where thinking and decision-making take place—is more complex in humans than it is in other animals. Thus, says Dr. Braun, it is important to be "really careful" about extrapolating the recent findings to human populations.