Variation with age in neuron number in the bed nucleus of the mouse anterior commissure

The number of neurons in the bed nucleus of the anterior commissure (BAC) was estimated at 6, 12, 15, 22, 25, 28 and 31 months. There was a highly significant (p less than 0.001) decline in neuron number with age. Neuron loss was, however, restricted to the period between 15 and 22 months of age with no significant change in neuron number occurring either between 6 and 15 months or between 22 and 31 months of age.