Abstract
Submillisecond Monaural Coincidence Detection by Octopus Cells
Highlights
Octopus cells are one of the least studied projection cells in the mammalian cochlear nucleus in terms of in vivo physiology
These anatomical and physiological properties has led to the monaural coincidence detection hypothesis: octopus cells fire only when multiple auditory fiber inputs are activated over a very brief time window [5]
Single-cell labeling studies show that octopus cells generate “Onset I” (Oi) or “Onset L” (OL) responses to high-frequency pure tones, i.e. fire only one onset spike with no or little sustained activity [4, 6, 7, 8]
Summary
Octopus cells are one of the least studied projection cells in the mammalian cochlear nucleus in terms of in vivo physiology. There is no physiological evidence for inhibitory inputs, and each auditory nerve fiber produces only minor excitation [3] Their biophysical properties are unique among other cell types in the cochlear nucleus: they have an extremely fast membrane time constant (
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