rowe at pender.ee.upenn.edu (Mickey Rowe) writes:
>Whoops, I forgot something else that I wanted to add.
>In article <75178 at netnews.upenn.edu> pedro at mulab.physiol.upenn.edu> (maldonado) writes:
>>In physiological (real) conditions, the highest rate are only up to
>While this is a good rule of thumb, there are some cells that are
>known to be a bit faster. You might want to look into Renshaw Cells
>(in mammalian spinal cord). I think that they can respond at rates
>one or two magnitudes higher.
WRONG. 1000 spikes/second is an approximate upper limit, though I've
routinely seen neurons in external cuneate with 0.8 msec interspike
intervals -- but only when firing in doublets (that's 1300 Hz
instantaneous rate). Renshaw cells can fire a bit faster than 1000 Hz but
soon slow down.
The more appropriate figure for an upper limit is probably down around 200
spikes/sec -- and it varies, even among pyramidal track neurons (the
smaller ones have a lower upper limit).
William H. Calvin WCalvin at U.Washington.edu
University of Washington NJ-15
Seattle, Washington 98195 FAX:1-206-720-1989