Auditory cortical N100 in pre- and post-synaptic auditory neuropathy to frequency or intensity changes of continuous tones
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چکیده
منابع مشابه
Auditory cortical N100 in pre- and post-synaptic auditory neuropathy to frequency or intensity changes of continuous tones.
OBJECTIVES Auditory cortical N100s were examined in ten auditory neuropathy (AN) subjects as objective measures of impaired hearing. METHODS Latencies and amplitudes of N100 in AN to increases of frequency (4-50%) or intensity (4-8 dB) of low (250 Hz) or high (4000 Hz) frequency tones were compared with results from normal-hearing controls. The sites of auditory nerve dysfunction were pre-syn...
متن کاملN100 cortical potentials accompanying disrupted auditory nerve activity in auditory neuropathy (AN): effects of signal intensity and continuous noise.
OBJECTIVE Auditory temporal processes in quiet are impaired in auditory neuropathy (AN) similar to normal hearing subjects tested in noise. N100 latencies were measured from AN subjects at several tone intensities in quiet and noise for comparison with a group of normal hearing individuals. METHODS Subjects were tested with brief 100 ms tones (1.0 kHz, 100-40 dB SPL) in quiet and in continuou...
متن کاملIntensity changes in a continuous tone: auditory cortical potentials comparison with frequency changes.
OBJECTIVES To examine auditory cortical potentials in normal-hearing subjects to intensity increments in a continuous pure tone at low, mid, and high frequency. METHODS Electrical scalp potentials were recorded in response to randomly occurring 100 ms intensity increments of continuous 250, 1000, and 4000 Hz tones every 1.4 s. The magnitude of intensity change varied between 0, 2, 4, 6, and 8...
متن کاملFrequency changes in a continuous tone: auditory cortical potentials.
OBJECTIVE We examined auditory cortical potentials in normal hearing subjects to spectral changes in continuous low and high frequency pure tones. METHODS Cortical potentials were recorded to increments of frequency from continuous 250 or 4000Hz tones. The magnitude of change was random and varied from 0% to 50% above the base frequency. RESULTS Potentials consisted of N100, P200 and a slow...
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It has been suggested that infants respond preferentially to infant-directed speech because their auditory sensitivity to sounds with extensive frequency modulation (FM) is better than their sensitivity to less modulated sounds. In this experiment, auditory thresholds for FM tones and for unmodulated, or pure, tones in a background of noise were measured for 4-month-old infants using a conditio...
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ژورنال
عنوان ژورنال: Clinical Neurophysiology
سال: 2011
ISSN: 1388-2457
DOI: 10.1016/j.clinph.2010.08.005