Re: [tied] *h3 (More deja-vu)

--- In cybalist@..., Miguel Carrasquer <mcv@...> wrote:

> The /a/-vocalism in forms such as *(s)kWalos (Lat. squalus. Eng.

whale) or

> *kWasyo-/*kWaslo- (Lat. qua:lum, quasillus; Slav. kos^I) "basket"

points to *qW.

>

What are the typological grounds for the statement that uvulars
trigger a-colouring (and not o-colouring, for instance)? What would
be a possible (neuro)physiological explanation? Just wondering.

Sergei