腹横筋膜 ( ふくおうきんまく、英:transverse fascia

 

 「日本人体解剖学 (下巻) 」には詳しい解説は見当たらない。以下は「Rauber-Kopsch解剖学」の解説文となる。

「この筋膜は腹横筋の内面およびその(停止)腱膜の上部を被い,薄い膜となって横隔膜,腰方形筋の上に広がり,腰方形筋の内側縁で腰筋膜につづている.

腹横筋膜は,下方では腸骨稜,腸骨筋膜ならびに鼡径靱帯と結合している.この膜は半環状線より下方では腹直筋の後面を被い,鼡径靱帯の内側部の下方では外腸骨動静脈および裂孔靱帯に対して重要な関係をもっている.この筋膜から1つの嚢状の突起,すなわち腹横筋膜の鞘状突起Processus vaginalis fasciae transversalisがでて(図498),鼡径管を通って陰嚢のなかに下り,精巣および精索のまわりに1つの完全な被膜,すなわち精巣および精索の鞘膜Tunica vaginalis testis et funiculi spermaticiを成し,その外面は挙睾筋に被われている.この突起の入口は腹膜下鼡径輪Anulus inguinalis praeperitonealis, innerer Leistenring という名で呼ばれている.腹横筋膜より内方には腹膜Peritonaeum, Bauchfellがある.」

 

 また、以下は「Wikipedia」の解説文となる。

「The transverse fascia (or transversalis fascia) is a thin aponeurotic membrane which lies between the inner surface of the transverse abdominal muscle and the parietal peritoneum.
It forms part of the general layer of fascia lining the abdominal parietes, and is directly continuous with the iliac and pelvic fasciae.
In the inguinal region, the transverse fascia is thick and dense in structure and is joined by fibers from the aponeurosis of the transverse abdominal. It becomes thin as it ascends to the diaphragm and blends with the fascia covering the under surface of this muscle.
Borders: Behind, it is lost in the fat which covers the posterior surfaces of the kidneys.
Below, it has the following attachments: posteriorly, to the whole length of the iliac crest, between the attachments of the transverse abdominal and Iliacus; between the anterior superior iliac spine and the femoral vessels it is connected to the posterior margin of the inguinal ligament, and is there continuous with the iliac fascia.
Medial to the femoral vessels it is thin and attached to the pubis and pectineal line, behind the inguinal falx, with which it is united; it descends in front of the femoral vessels to form the anterior wall of the femoral sheath.
Beneath the inguinal ligament it is strengthened by a band of fibrous tissue, which is only loosely connected to the ligament, and is specialized as the iliopubic tract.
Opening:The spermatic cord in the male and the round ligament of the uterus in the female pass through the transversalis fascia at a spot called the deep inguinal ring.
This opening is not visible externally, since the transversalis fascia is prolonged on these structures as the internal spermatic fascia.」

 

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