What the Neocortex Does

Harry Erwin herwin at gmu.edu
Sun Aug 6 06:42:11 EST 2000

Gary Forbis <GaryForbis at email.msn.com> wrote:

> Now, I'm going to be in real trouble.
> Are there "computational processes in wet networks" or is it that the
> processes in wet networks can be described computationally?  Again,
> does a rock perform computations by falling?  What makes a process
> a computational process?

Well, bats do estimate the location of the prey targets that they are
attempting to capture, so it's not simply a rock falling. The mechanisms
of this localization seem to involve measurement of range by echo-delay,
azimuth by comparison of the signals at the two ears, and elevation by
comparison of the target spectrum with a continuum of spectral
characteristics. The bat also estimates target velocity and acceleration
from those data, and predicts the target movement over time as part of
an internal world model.

Harry Erwin, PhD, <mailto:herwin at gmu.edu>,Computational Neuroscientist 
(modeling bat behavior), Senior SW Analyst and Security Engineer, and 
Adjunct Professor of Computer Science, GMU. Looking--CV available at: 

More information about the Neur-sci mailing list