کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9436561 1615696 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Concurrent measurement of the detectability of tone bursts and their effect on the excitability of the human blink reflex using a probe-signal method
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی سیستم های حسی
پیش نمایش صفحه اول مقاله
Concurrent measurement of the detectability of tone bursts and their effect on the excitability of the human blink reflex using a probe-signal method
چکیده انگلیسی
The probe-signal method has shown that auditory signals that are either presented more often in a series of trials or that are immediately preceded by cues of the same frequency on a single trial are detected more readily than signals of other frequencies. The frequency range in which detection is favored defines an attentional band, which is thought to result from an effective attenuation of deviant frequencies in the cochlea, possibly by activation of the olivocochlear bundle. In a 2IFC procedure in which the first observation interval was preceded by a 1300-Hz cue, subjects detected cued probe tones (at 1300 Hz) but not uncued probe tones (at 1000 Hz or 1600 Hz) at better than chance levels. Concurrent elicitation of a blink reflex by presentation of an air puff in the first observation interval on a random half of the trials showed that cued probes, but not uncued probes, inhibited the size of the blink reflex. These data show that uncued probes do not enter into the low-level sensory processing in the brainstem which is responsible for reflex modification. This finding is consistent with the view that stimuli whose frequency falls outside an attentional band are excluded at the auditory periphery.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hearing Research - Volume 202, Issues 1–2, April 2005, Pages 28-34
نویسندگان
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