Boylston prize dissertations : on 1. Inflammation of the periosteum. 2. Eneuresis irritata. 3. Cutaneous diseases. 4. Cancer of the breast. Also remarks on malaria / by Usher Parsons.

  • Parsons, Usher, 1788-1868.
Date:
1839, ©1838
Catalogue details

Licence: Public Domain Mark

Credit: Boylston prize dissertations : on 1. Inflammation of the periosteum. 2. Eneuresis irritata. 3. Cutaneous diseases. 4. Cancer of the breast. Also remarks on malaria / by Usher Parsons. Source: Wellcome Collection.

Provider: This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.

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    without penetrating the cavity of the abdomen. It is by a lax cellular structure that this membrane ad- heres to the subjacent or muscular coat, and this cellular tunic covers the whole bladder, and by some anatomists has been enumerated as one of its coats. The muscular membrane, destined to contract and sustain the bladder, is situated within the peritoneal coat, and extends over the whole organ,—is of une- qual thickness in different portions of its extent,—is very thin in front, behind and on the sides,—is more developed towards the neck, and especially between the vesiculae seminales. Its fibres are whitish, flat- tened, and run in various directions, sometimes inter- lacing and combining, constituting fleshy columns. Low down in the fore part of the bladder, the muscular fibres collect into a sort of tendon, which stretches off to the pubis, and this in the contractions of the organ causes it to be drawn forward towards the back of the bone. A few fibres extend to the dense, white elastic substance, constituting the chief thickness of the neck of the bladder, and which is not covered by a particu- lar muscle of the sphincter kind, as some anatomists have maintained.* * Mr. Bell says, the true sphincter of the neck of the bladder has hitherto escaped notice ; it has been looked for on the outside of the prostate gland, and then the compressor prostata?, the levator urethra?, and the levator ani have been considered as sphincters, and so indeed they are, inasmuch as during their action the urine cannot be expelled along the urethra; but the true and appropriate sphincter of the blad- der lies under the base of the prostate gland, and immediately sur- rounding the beginning of the urethra. In another place, vol. 1, p. 231, he says, the sphincter vesica? is not easily distinguished from the detrusor utilise, being the fibres of it, only thicker and stronger at the lower and narrower part of the bladder. It is the opinion of French