Evoked potential recorder based on time characteristic indicators

Abstract

The invention discloses an evoked potential recorder based on time characteristic indicators, which can carry out the computation and the function indicator measurement based on the following functional relation: L-Lmin=ae-bx or lg(L-Lmin)=-Bx+A, wherein L is response delay of a nervous system to a certain frequency simulating signal, x is logarithm of instantaneous strength of the simulating signal or constant coefficient of an increasing function; P(t) is the instantaneous strength; and Lmin, a and b, A(A=lga) and B(B=b / ln10), and K and T are constants relevant to the time response characteristics of the nervous system. Lmin is the shortest delay, T is a time conversion coefficient, K is a time (sound-electricity) conversion index, and the Lmin, the T and the K can respectively reflect various physiological functions and changes thereof of transfer characteristics of nerve fibers and synapses of hair cells, mechanical transfer characteristics of sound, sensibility of auditory center system nerve cells, sound-electricity conversion characteristics and the like.

Description

technical field [0001] The invention relates to an evoked potential analysis method using time characteristics as an index, and an evoked potential recorder based on the method. technical background [0002] Auditory evoked potential is a series of electrical activities that occur in the auditory nerve pathway when the organism receives certain sound stimuli. Recording the evoked potentials at all levels of auditory nerve nuclei is called the near-field recording method; the auditory evoked potentials recorded in the near-field have a large amplitude and a high signal-to-noise ratio. Generally, a relatively stable waveform can be obtained after a few times of superimposition. Recording the evoked potential on the surface of the scalp is called the far-field recording method; the auditory evoked potential recorded by the far-field has a small amplitude and a low signal-to-noise ratio, and it usually takes hundreds of times of superposition to obtain a relatively stable wavefo...

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Problems solved by technology

[0011] However, the evoked potential instruments used in existing clinical and scientific research and described in various patents do not have the ability to calculate and output directly reflect the physiological functions of the auditory system (even the nervous system) (such as acoustic-electric conversion, mechanical transmission of sound and bioelectricity). In the transmission of the nervous system, the sensitivity of neurons) and the indicators of state changes; when the sound is stimulated, it is repeated multiple times of a single sound, which is too monotonous and has a large system error; at the same time, the ascending and descending segments of short sounds are often ignored The function of its amplitude time variation function, not only the variability of the obtained results (such as the delay of the short latency wave) is large, but also the obtained data cannot be systematically and effectively processed due to insufficient data continuity

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