On atheroma and some of its consequences, with their treatment : an address delivered before the Cardiff Medical Society on February 21, 1895 / by T. Lauder Brunton.

  • Brunton, Thomas Lauder, Sir, 1844-1916.
Date:
[1895]
Catalogue details

Licence: Public Domain Mark

Credit: On atheroma and some of its consequences, with their treatment : an address delivered before the Cardiff Medical Society on February 21, 1895 / by T. Lauder Brunton. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    yet the effect of arterial degeneration upon them is probably due to an alteration in tbe heart as well as the brain. Whenever any organ is called upon for increased exertion, whether it be a muscle, a gland, or the brain itself, an increased supply of arterial blood appears to be necessary, and in a healthy organism this increased supply is always provided to the organ by dilatation of the arteries which supply it. As Bernard has well shown, the artery of a secreting gland dilates, the capil- laries enlarge, and the blood gushes through them into the veins. In a contracting muscle the vessels also dilate, and, although the current of blood during the actual contraction may be increased or diminished, yet the vessels of the muscles always dilate, and a full stream of blood passes through it either during the contraction itself or after the contraction is over. (Fig. 3.) Fig. 3. After Ludwig and Sadler. The marks along the base line indicate seconds ; the height above the base line indicates the amount of blood flowing from the veins of the biceps of a dog during tetanus (t or tet), during rest (Rube), or during simple contraction (Zuck). A similar dilatation of the blood vessels of the brain has been shown by Mosso, who found that even such a slight exertion as