Re: Rationale for Critical Bands

[Martin Braun <nombraun@xxxxxxxxx>]

"The 1988 quotes" show nothing but the authors' opinions, which you were so 
much interested in. Relevant for science, of course, are not opinions but 
data. For this reason I told you:

> Here you find many neuronal tuning curves which show you a level 
> independence over large level ranges.

Unfortunately I cannot send figures on this list, but you can download the 
Ehret and Merzenich (1988) and see the tuning curves. Average neuronal 
tuning data from the ICC that you have pointed at are of little use, because 
behavior and function of neurons in this nucleus varies greatly. There is no 
other way than looking at single neuron data. Sorry.

Again, Ehret and Merzenich did not yet observe that the neuronal tuning data 
corresponded quantitatively to the behavioral CB data. Rather, they found 
that the neuronal tuning data corresponded qualitatively to the behavioral 
CB data. They only suggested a quantitative correspondence. For an answer to 
this question we needed data from multi-electrode recordings in the ICC. 
These data were collected, in huge quantities, by Langner and Schreiner, 
also in the 1980s. But only during the 1990s did these authors carry out the 
calculations that revealed the quantitative correspondence between the 
neuronal and the behavioral CB data.

You also might like to know that recently the CB related observation in the 
cat were fully replicated in the rat. This is a paper that you can even 
download for free, in pdf and html:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2440588/?tool=pubmed

Thank you for the discussion.

Martin


---------------------------------------------------------------------
Martin Braun
Neuroscience of Music
S-671 95 Klässbol
Sweden
email: nombraun@xxxxxxxxx
web site: http://www.neuroscience-of-music.se/index.htm






----- Original Message ----- 
From: "Richard F. Lyon" <DickLyon@xxxxxxx>
To: <AUDITORY@xxxxxxxxxxxxxxx>
Sent: Saturday, June 26, 2010 7:50 AM
Subject: Re: Rationale for Critical Bands


I'm still unclear on Ehret's point of view on
this critical band in ICC and its level
dependence or not.  The 1988 quotes don't clarify
a lot.

[.........]