Well, here's two pieces of relevant info:-

"Metric analyses show that the brain height, frontal breadth, cerebral height, 
frontal height, and parietal chord from Homo erectus to modern humans 
increased, while the length, breadth, frontal chord, and occipital breadth did 
not change substantially." taken from:-http://cat.inist.fr/?
aModele=afficheN&cpsidt=17958845 

also:-

"Homo erectus heads were strikingly different from ours in shape.  They had 
relatively strong muscles on the back of their necks.   Their foreheads were 
shallow, sloping back from very prominent bony brow ridges (i.e., supraorbital 
tori ).  Compared to modern humans, the Homo erectus brain case was more 
elongated from front to back and less spherical.  As a consequence, the 
frontal and temporal lobes of their brains were narrower, suggesting that they 
would have had somewhat lower mental ability.
The adult Homo erectus brain size ranged from around 750 to 1250 cm3, 
averaging about 970 cm3.  While this was only around 72% the size of modern 
human brains on average, the upper end of the Homo erectus brain size range 
overlapped that of modern people.  However, the larger brained Homo erectus 
mostly were relatively late in time and are considered by some 
paleoanthropologists to be a more recent human species (Homo 
heidelbergensis or early archaic Homo sapiens)."  

taken from:-  http://anthro.palomar.edu/homo/homo_2.htm

Geoff


On Wed, 14 May 2008 11:29:34 -0500, Paleogal 
<[log in to unmask]> wrote:

>> Geoffrey Purcell wrote:
>>>
>>> As far as cooking is concerned, it's already been pointed out that the
>>> average hominid brain-size heavily expanded in size long before cooking
>>> was ever invented, so there's clearly no link between cooking and
>>> brain-size>>
>
>Hmmmm.....   What part of the brain was increased?  Oliva