Electrode deactivation worsens spectral resolution despite unchanged stimulation rate

Evidence

Some researchers have not observed benefit from electrode deactivation and have even demonstrated potentially deleterious effects for Cochlear device users. Henshall and McKay ( 2001 ) used a multidimensional scaling technique to identify and deactivate electrodes having non-tonotopic percepts. They did not find an improvement in speech perception when channels were switched off and hypothesized that this could be due to the shift in frequency-to-electrode allocation produced by clinical software when electrodes are deactivated; particularly in the apical region. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2059 (#corroborates, via linked claim)

Categorization

Category: Causal Relationships

Related

• Deactivating electrodes can shift frequency-to-electrode mapping and worsen perception (similarity 0.95)
• Deactivating an electrode shifts frequency-to-electrode allocation and can negate expected benefits. (similarity 0.93)
• Electrode deactivation outcomes depend on stimulation rate and filter allocation differences (similarity 0.92)
• Deactivating discriminable electrodes controls whether benefit comes from channel count or pitch quality (similarity 0.90)
• Deactivating multiple implant electrodes can worsen frequency information transmission (similarity 0.88)
• Deactivating cochlear implant electrodes harms spectral ripple resolution but spares speech perception (similarity 0.88)
• Deactivating pitch-indiscriminable cochlear implant electrodes yields no speech benefit (similarity 0.88)
• Deactivating non-distinct cochlear implant electrodes fails to improve speech perception (similarity 0.88)
• Deactivating indiscriminable implant electrodes fails to improve and even worsens perception (similarity 0.87)
• Pitch-based electrode deactivation provides no speech benefit for ACE users (similarity 0.87)
• Electrode deactivation reallocates frequencies and can harm rather than help (similarity 0.86)
• Too few channels were deactivated to demonstrate any speech benefit (similarity 0.86)
• Deactivating multiple electrodes can worsen rather than improve information precision. (similarity 0.86)
• Electrode deactivation benefits depend on the sound processing strategy used. (similarity 0.86)
• Deactivating too few channels fails to show performance differences in n-of-m CI strategies (similarity 0.86)

Broader Connections

• Deactivating CI electrodes worsens spectral resolution rather than improving speech perception #corroborates (0.92)
• Deactivating electrodes can shift frequency-to-electrode mapping and worsen perception #corroborates (0.85) — Dijk, Pim van, Physiology, Psychoacoustics and…, 2059
• Deactivating multiple implant electrodes can worsen frequency information transmission #corroborates (0.85)
• Electrode deactivation outcomes depend on stimulation rate and filter allocation differences #qualifies (0.80)
• Deactivating discriminable electrodes controls whether benefit comes from channel count or pitch quality #expands (0.75)