Alarcon G, Guy C N, Walker S R
Blackett Laboratory, Physics Department, Imperial College, London, U.K.
J Neurosci Methods. 1991 Jun;38(1):1-14. doi: 10.1016/0165-0270(91)90148-s.
An ASSEMBLER routine is described for data acquisition and "on-line" averaging, artefact rejection and graphic display of data on a personal microcomputer (IBM compatible). The user determines the number of input channels, sampling frequency, number of samples, input range, stimulation frequency (epoch frequency) and the number of epochs to be acquired and averaged. Data from each epoch are scanned in search of saturating artefacts and will be added to previous epochs if none is found. Data are then graphically displayed as voltage versus time before acquiring next epoch. Display options can be defined by the user at run time by means of the keyboard and include: display of last epoch, display of the average, storage screen and refreshing screen after every epoch. High data transfer rates and program speed allows for high stimulation rates in the presence of on line graphic display. The computer then behaves as a multichannel digital oscilloscope with access to large memory buffers, disk storage, high averaging capabilities, artefact rejection and wide potential for data analysis. Its applications to the recording of magnetic and electric evoked responses are illustrated. The program is available from the authors.
本文介绍了一种用于在个人微型计算机（IBM兼容）上进行数据采集、“在线”平均、伪迹剔除和数据图形显示的汇编程序。用户可确定输入通道数、采样频率、样本数、输入范围、刺激频率（时段频率）以及要采集和平均的时段数。扫描每个时段的数据以寻找饱和伪迹，如果未发现则将其添加到先前的时段中。然后在采集下一个时段之前，将数据以电压对时间的形式进行图形显示。用户可以在运行时通过键盘定义显示选项，包括：显示最后一个时段、显示平均值、存储屏幕以及每个时段后刷新屏幕。高数据传输速率和程序速度使得在进行在线图形显示时能够实现高刺激速率。此时，计算机就如同一台多通道数字示波器，可访问大型内存缓冲区、磁盘存储，具有高平均能力、伪迹剔除功能以及广泛的数据分析潜力。文中还举例说明了该程序在记录磁和电诱发反应方面的应用。该程序可从作者处获取。
