Section II. Systems and Program
A program for cycle-by-cycle shape analysis of biological rhythms. Application to respiratory rhythm

https://doi.org/10.1016/0169-2607(86)90064-7Get rights and content

Abstract

A computer program for cycle-by-cycle analysis and quantification of biological rhythms, written for an Apple II microcomputer with 48k RAM is described. The program comprises 4 steps: (1) file constitution suitable for biological data collecting; (2) signal digitalization at a sampling rate up to 1 kHz with storage in central memory; (3) determination of each cycle's limits (delimitation parameters being defined by the user; following delimitation, cycles may be dropped or saved for further analyses); (4) cycle-by-cycle harmonic analysis (fast Fourier Transform algorithm). The program is written in BASIC Applesoft, hardware-dependent functions (analog inputs, graphic display and random access disk storage) are implemented in subroutines (partly assembler) which may be easily modified. The program, consisting of 4 chained procedures is run interactively, although procedure (4) may be run automatically. Analysis of human ventilatory airflow signal with this program is given as an example of cycle-by-cycle shape analysis of a biological rhythm.

References (9)

  • A. Cappozzo et al.

    A general computing method for the analysis of human locomotion

    J. Biomechanics

    (1975)
  • J. Mead et al.

    Dynamics of breathing

  • J. Milic-Emili

    Relationship between neuromuscular respiratory drive and ventilatory output

  • C.B. McCall et al.

    Harmonic content of certain respiratory flow phenomena of normal individuals

    J. Appl. Physiol.

    (1957)
There are more references available in the full text version of this article.

Cited by (0)

View full text