ERA-stimulation with free-programable frequency and intensity Sequence?A method to reduce the examination time

Abstract

A new method for ERA-stimulation with free-programable sequence of intensity and frequency will described. We developed to realize this method a Free-Programable ERA-Stimulator, FPERAS/74. The expectation has been confirmed that this way of stimulation which includes a regular change of frequency and intensity of the auditory stimuli decreases effective the development of habituation in its amount and velocity. In our experiment (K- and P-experiment) it will be clarified the efficiency of this method both with regard to the time-saving during the recordings of the AEP and its quality comparee with the conventionally determined AEP. It can be stated a triple shortening of the examination time with a simultaneous improvement of the quality and the reproductibility of the AEP.

Frequency-Specific Threshold Determination with the CERAgram Method: Basic Principle and Retrospective Evaluation of Data

“…In contrast to steady-state methods [Lins and Picton, 1995;Lins et al, 1996], where amplitude-modulated tones of different frequencies are presented simultaneously, these frequencies are presented separately in random order with identical probability (excluding the consecutive occurrence of two identical stimuli). Using such a stimulation paradigm, the interstimulus intervals can be considerably reduced without a substantial reduction of the AEP amplitudes [Pantev et al, 1975]. Therefore, a relatively short interstimulus interval is used (randomized between 1.2 and 1.6 s).…”

“…The time t = 0 of the stimulus-related EEG epochs is defined as that point in the rising edge of the stimulus when the intensity reaches its half value. As suggested by Sharrard [1973] and Pantev et al [1975], tone bursts of different frequencies are presented in random order so that all frequencies are tested quasi-simultaneously. In the present implementation of the CERAgram method, four frequencies (covering the main frequency range of human speech) are tested: 500, 1000, 2000 and 3000 Hz.…”

Bigger Is Better

“…More specifically, an increase of the CAEP amplitude has been found in response to novel stimuli while varying level, frequency, stimulus onset asynchrony (SOA), and ear of stimulation (Butler 1972;Pantew et al 1975; Bardy et al 2014aBardy et al , 2014b. However, these benefits are subject to debate (Lightfoot & Kennedy 2006).…”

Music-induced cortical plasticity and lateral inhibition in the human auditory cortex as foundations for tonal tinnitus treatment

“…Several electroencephalographic studies on habituation of the auditory cortex showed that the amplitude of the N1 response was most strongly attenuated when the preceding and subsequent sound stimuli had the same frequency as the test frequency (Butler, 1968; Picton et al, 1974; Pantev et al, 1975; Näätänen and Picton, 1987; Näätänen et al, 1988). However, in addition to this effect upon the neural group with the same receptive field, neural activity corresponding to frequencies adjacent to the test stimulus might play an important role for the neural response (Sutter and Loftus, 2003; Jääskeläinen et al, 2004; Okamoto et al, 2004; Pantev et al, 2004).…”