Temporal pitch coding via entracking gives way to place coding above 500 Hz
Evidence
An obvious limitation in this scalar code is the upper limit of firing (usually near ~ 500 Hz). We surmise that at low SPLs and fundamental frequencies > 500 Hz, a spectral or place mechanism codes for pitch (Cedolin and Delgutte 2005 ; Larsen et al. 2008 ). With increasing SPL the place code degrades but entracking improves and first occurs in the neurons with the lowest thresholds for the spectral components present. — Dijk, Pim van, Physiology, Psychoacoustics and…, 4521
Categorization
Category: Causal Relationships
- QUESTION: Worth checking the Cedolin and Delgutte 2005 and Larsen et al. 2008 citations to see the empirical evidence for the spectral-place mechanism above 500 Hz at low SPLs.
Related
- Pitch coding shifts between place and entracking mechanisms depending on stimulus level (similarity 0.96)
- Entracking codes pitch through constant firing rate while spike phase stays irrelevant (similarity 0.87)
- Entracking codes low-frequency pitch through uniform firing across neurons while high-frequency firing varies (similarity 0.87)
- Pitch is coded by firing rate constancy, not spike phase (similarity 0.87)
- Pitch is coded by different mechanisms above and below roughly 3 kHz (similarity 0.86)
- Entracking generates horizontally flattened rate profiles that encode pitch as firing rate (similarity 0.86)
- Pitch can be coded by neuron firing rate matching the repetition frequency (similarity 0.86)
- Brainstem entracking produces horizontal ‘butte’ rate-place profiles encoding pitch (similarity 0.85)
- Place and temporal codes work together and must stay synchronized for accurate pitch. (similarity 0.84)
- Pitch can be coded by monotonic firing rate instead of tuned delay circuits (similarity 0.84)
- The place code alone explains pure-tone pitch above 4-5 kHz. (similarity 0.84)
- Place coding poorly carries pitch when harmonics go unresolved. (similarity 0.84)
- Temporal codes yield weak pitches compared to place codes (similarity 0.84)
- Place code governs pitch perception of pure tones above about 4 to 5 kHz (similarity 0.84)
- Envelope-peak-based pitch coding relaxes the phase-locking constraint on auditory processing (similarity 0.84)