File:Cunningham's Text-book of anatomy (1914) (20629111828).jpg

Title: Cunningham's Text-book of anatomy
Identifier: cunninghamstextb00cunn (find matches)
Year: 1914 (1910s)
Authors: Cunningham, D. J. (Daniel John), 1850-1909; Robinson, Arthur, b. 1862, ed
Subjects: Anatomy
Publisher: New York, W. Wood
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Knowledge Commons

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PAEIETAL BEAlSTCHES OF THE HYPOGASTEIC AETEEY. 941 fascia, passes between the piriformis and coccygeus muscles, and leaves the pelvis to enter the buttock. It is accompanied by vense comites, the inferior glutgeal vessels and nerves, the pudendal nerve, and the nerve to the obturator internus. In the buttock it lies on the spine of the ischium, under cover of the glutseus maximus, and between the pudendal nerve and the nerve to the obturator in- ternus, the former being medial to it. It next passes through the lesser sciatic foramen and enters the perineum, in the anterior part of which it terminates by dividing into the profunda artery of the penis and the dorsal artery of the penis. In the first part of its course in the perineum the artery lies in the lateral fascial wall of the ischio-rectal fossa, where it is enclosed in a canal in the fascia Crus penis Perineal artery Superficial trans- verse perineal muscle Internal pudendal artery Inferior hasmor- rhoidal artery Sphincter ani externus
Text Appearing After Image:
Crus penis Dorsal artery of penis and profunda artery of penis Bulb of penis Sphincter of membranous urethrse Artery to bulb Perineal artery Transverse branch of perineal artery Internal pudendal artery Inferior haemor- rhoidal artery I Gluteus maximus Fig. 775.—The Perineal Distribution of the Internal Pudendal Artery in the Male. (Alcock's canal). This canal, which is situated about one and a half inches above the lower margin of the tuberosity of the ischium, contains also the pudendal veins and the terminal parts of the pudendal nerve, viz., the dorsal nerve of the penis, which lies above the artery, and the perineal division, which lies below the vessel. From the ischio-rectal fossa the internal pudendal artery is continued forwards between the two layers of the fascia of the urogenital diaphragm (O.T. triangular ligament of the urethra), and close to the ramus of the pubis. About half-an- inch below the arcuate ligament it turns somewhat abruptly forwards, pierces the inferior fascia of the urogenital diaphragm, and immediately divides into its terminal branches, viz., the profunda artery and the dorsal artery of the penis. The division sometimes takes place whilst the artery is still between the layers of the urogenital diaphragm. Branches.—In the pelvis it gives small branches to the neighbouring muscles and to the roots of the sacral plexus. In the buttock.—(a) Muscular branches are distributed to the adjacent muscles, (b) Anastomotic branches unite with branches of the superior and inferior glutseal, and medial circumflex arteries.

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