Pitch orientation-discriminating feature detectors?

[Eliot Handelman <eliot@xxxxxxxxxxxxxx>]

Dear list,

Do we happen to know of anything indicating the existence of
pitch-orientation selective cells in any species, eg cell-assemblies
responding specifically to, say, upward moving pitch, rather than
downward movement?

A further question: do we happen to know whether pitch difference
sensitivity responds to orientation of movement?

Many thanks for any pointers.

-- eliot

---
Eliot Handelman PhD
Montreal, Canada