Muscle fatigue.

London : University of London Audio-Visual Centre, 1974.

1 encoded moving image (46.19 min.) : sound, black and white.

00:46:19

University of London

Unrestricted

CC-BY-NC

Creative Commons Attribution-Non-Commercial 2.0 UK: England & Wales

In English

Presented by Dr Richard Edwards, Wellcome Senior Research Fellow, Royal Postgraduate Medical School. Produced by Martin Hayden. Made by University of London Audio-Visual Centre. Made for British Postgraduate Medical Federation. Research supported by The Wellcome Trust and the Muscular Dystrophy Group of Great Britain.

This video is one of around 310 titles, originally broadcast on Channel 7 of the ILEA closed-circuit television network, given to Wellcome Trust from the University of London Audio-Visual Centre shortly after it closed in the late 1980s. Although some of these programmes might now seem rather out-dated, they probably represent the largest and most diversified body of medical video produced in any British university at this time, and give a comprehensive and fascinating view of the state of medical and surgical research and practice in the 1970s and 1980s, thus constituting a contemporary medical-historical archive of great interest. The lectures mostly take place in a small and intimate studio setting and are often face-to-face. The lecturers use a wide variety of resources to illustrate their points, including film clips, slides, graphs, animated diagrams, charts and tables as well as 3-dimensional models and display boards with movable pieces. Some of the lecturers are telegenic while some are clearly less comfortable about being recorded; all are experts in their field and show great enthusiasm to share both the latest research and the historical context of their specialist areas.

Segment 1 Edwards introduces the lecture and describes the general physiology of muscle activity. Time start: 00:00:00:00 Time end: 00:04:51:00 Length: 00:04:51:00

Segment 2 Edwards stands next to a patient on an examining table and, with him as a model, demonstrates some standard neurological tests. Time start: 00:04:51:00 Time end: 00:10:04:00 Length: 00:05:13:00

Segment 3 Edwards looks at the relationship between the force of contraction and the time for which a contraction can be held. He uses graphs to chart this information. Time start: 00:10:04:00 Time end: 00:15:22:00 Length: 00:05:18:00

Segment 4 Edwards uses further diagrams to show the force measurements of voluntary contractions compared to electrically stimulated contractions. Time start: 00:15:22:00 Time end: 00:20:16:00 Length: 00:05:54:00

Segment 5 Edwards demonstrates a thermocouple needle which can be used to study patients with neuromuscular disorders. He shows how it can be used to study the maximum heat production in some of the small muscles of the hand. Time start: 00:20:16:00 Time end: 00:25:43:15 Length: 00:05:27:15

Segment 6 Edwards uses graphs and slides to illustrate the findings of differing chemistry biopsies on muscles before, during and after contraction. Time start: 00:25:43:15 Time end: 00:29:54:08 Length: 00:04:10:18

Segment 7 Edwards compares levels of muscle fatigue in normal subjects and those with neuromuscular problems. He goes into detail as to how these differ further by comparing different kinds of muscle fatiguing illnesses including hypothyroid myopathy, anaerobic glycosis and McArdle's syndrome. Time start: 00:29:54:08 Time end: 00:34:55:00 Length: 00:05:00:17

Segment 8 Edwards refers to photomicrographs showing disease in the muscle structures of various illnesses. Time start: 00:34:55:00 Time end: 00:39:15:00 Length: 00:04:20:00

Segment 9 Edwards shows some needle biopsy samples of human muscles, then concludes the lecture. Time start: 00:39:15:00 Time end: 00:46:19:04 Length: 00:07:04:04