// Contributions of aging, auditory nerve health, and speed of processing to psychophysical gap detection thresholds in cochlear implant users
20名語後聽障成人（37–87歲），以ECAP IPG slope估算聽神經密度，測500與3500 pps脈衝之縫隙檢測閾值(GDT)與處理速度｜結果：GDT隨年齡惡化；3500 pps較500 pps整體改善GDT，年輕者受益更大；ECAP IPG slope未能預測GDT；較慢的認知處理速度僅在3500 pps時與較差GDT相關｜結論：高脈衝率下時間縫隙編碼主要受中央/認知（非周邊聽神經密度）限制，提示CI參數調整與認知訓練具實用應用價值
// Objective: to determine how auditory nerve (AN) density, aging, pulse rate, and cognitive processing speed affect gap detection thresholds (GDTs) in adult cochlear implant users. Methods: twenty post-lingually deafened adults (37–87 years) completed ECAP recordings using the interphase gap (IPG) slope as an AN density estimate, psychophysical GDTs with 500 and 3500 pps pulse trains on selected electrodes, and a processing-speed test. Results: GDTs worsened with age; higher pulse rates improved GDTs overall but more so in younger listeners; AN density estimates did not predict GDTs; slower cognitive speed was linked to poorer GDTs only at the higher pulse rate. Conclusion: central/cognitive factors, rather than peripheral AN density, primarily limit temporal gap encoding in adult CI users when stimulus pulse rate is high.
Published 2026年9月12日
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