蒙古沙鼠中同时掩蔽产生的复合动作电位偏移和起始调谐曲线。将探测刺激强度从55分贝声压级变化到85分贝声压级的影响。

Compound action potential offset and onset tuning curves generated by simultaneous masking in the mongolian gerbil. Effects of varying the intensity of the probe stimulus from 55 to 85 dB SPL.

作者信息

Henry K R

机构信息

Dept. of Psychology, University of California, Davis 95616.

出版信息

Hear Res. 1987;30(1):49-54. doi: 10.1016/0378-5955(87)90182-1.

DOI:10.1016/0378-5955(87)90182-1

PMID:3680053

Abstract

Action potential tuning curves (TCs) were produced by simultaneous masking of both the onset and offset of tone bursts. Offset TCs are much more sharply tuned than onset TCs when both responses are generated by stimuli at SPLs of 55 to 75 dB. The onset TC tip and the offset TC high frequency tip thresholds accurately reflect increases of the probe SPL, but the low frequency tip and the peak of the offset TC compress this change. With increasing probe SPL, the onset TC and low frequency TC tip (but not the high frequency tip and peak) of the offset TC become progressively detuned.

摘要

动作电位调谐曲线（TCs）是通过同时掩蔽音爆的起始和结束而产生的。当两种反应均由55至75分贝声压级（SPL）的刺激产生时，结束TCs的调谐比起始TCs更为尖锐。当两种反应均由55至75分贝声压级（SPL）的刺激产生时，起始TCs的尖端和结束TCs的高频尖端阈值准确反映了探测声压级（SPL）的增加，但结束TCs的低频尖端和峰值压缩了这种变化。随着探测声压级（SPL）的增加，起始TCs以及结束TCs的低频TCs尖端（而非高频尖端和峰值）逐渐失谐。