Narrow-band filter techniques for the detection and measurement of evoked responses

Fricker, Stephen J.

doi:10.1016/0013-4694(62)90118-9

Cited by 11 publications

(1 citation statement)

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“…To improve the signal-to-noise ratio of the steady state evoked potential, the EEG was analyzed by means of a synchronous narrow-band filtering technique (see Fig. 2) basically similar to those employed by Van der Tweel et al (1958) and Fricker (1962). The amplified EEG signals were first pre-filtered through a Kron-hite (Model 330-M) 24 db/octave bandpass filter with cutoff frequencies set at 0.1 log unit below and above the stimulus alternation rate, eliminating harmonics of the fundamental response frequency.…”

Section: Recording and Data Analysismentioning

confidence: 99%

Multiple spatial-frequency tuning of electrical responses from human visual cortex

1978

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Human occipital potentials evoked by stimulation with a counterphase flickering grating were recorded by a digital narrowband filter technique. The data showed a surprising degree of narrow tuning to particular spatial frequencies in addition to the expected narrow temporal frequency tuning. At each temporal frequency, there could be two or more peaks of different spatial frequencies, each distinct from the whole field flicker response. Variations in this multiple spatial frequency tuning were investigated as a function of luminance, electrode location, and temporal frequency for several observers. The results are interpreted in terms of many stimulus-specific resonant neural circuits within the brain, and suggest that it is possible to make a highly detailed exploration of the responses of neural circuits to visual stimulation.

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Section: Recording and Data Analysismentioning

confidence: 99%