No subject

human cortex is a myth.  There is postnatal cortical cell death in rodents,
but in primates (including humans) there is only (i) a decreased density of
cell packing, and (ii) massive (up to 50%) synapse loss.  (The decreased
density of cell packing was apparently misinterpreted as cell loss in the
past).  Of course, there are pathological cases, such as Alzheimers, in
which there is cell loss.

I have written a review of human postnatal brain development which I can
send out on request.

Mark Johnson

===============
Mark H. Johnson

Senior Research Scientist (Special Appointment)
Professor of Psychology, University College London

MRC Cognitive Development Unit,
4 Taviton Street,
London WC1H OBT,
UK

tel: 0171-387-4692
fax: 0171-383-0398