Observations on the rate of vibration in ankle clonus / by J.A. MacWilliam.

  • MacWilliam, J. A. (John Alexander), 1857-
Date:
1902
Catalogue details

Licence: In copyright

Credit: Observations on the rate of vibration in ankle clonus / by J.A. MacWilliam. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    obtained may look like a pulse tracing with a well-marked dicrotic wave (fig. 4), Fig. 4 reproduces a portion of a tracing in which the dicrotic type gradually merged into the kind of tracing shown in figs, i and 2. At the right hand side of fig. 4 there are alternate large and small curves ; towards the left side the general characters of fig. 2 develop; it is seen that the small alternate waves grade into the broader curves of figs. 2 and i. In the early part of the tracing the rate is about 12 per second : in the later part 13. ^— J* -J\ ~A-i Fig. 3. A < A—. ' » \ Fig. 4. / ; \ „ ,v Fig. 5. The effects of the two single taps on the tendo Achillis are shown in fig. 5 ; two well-marked twitches occur after each tap; these twitches occupy somewhat longer time than two contractions of the ankle clonus. After the two twitches (in fig. 5) there come one or two slighter oscillations of longer duration. (Upward movement of the lever = con- traction.)