The deep inguinal ring (internal or deep abdominal ring, abdominal inguinal ring, internal inguinal ring) is the entrance to the inguinal canal.
Location
The surface anatomy of the point is disputed, but in a recent study[1] it was found to be at a point between the mid-inguinal point (situated midway between the anterior superior iliac spine and the pubic symphysis) and the midpoint of the inguinal ligament (ie. midway between the anterior superior iliac spine and the pubic tubercle. Traditionally either one of these 2 sites was claimed as its location.
Some sources state that it is at the layer of the transversalis fascia.[2]
Shape
It is of an oval form, the long axis of the oval being vertical; it varies in size in different subjects, and is much larger in the male than in the female.
Boundaries
It is bounded, above and laterally, by the arched lower margin of the transversalis fascia; below and medially, by the inferior epigastric vessels.
Transmission
It transmits the spermatic cord in the male and the round ligament of the uterus in the female.
Extensions
From its circumference a thin funnel-shaped membrane, the infundibuliform fascia, is continued around the cord and testis, enclosing them in a distinct covering.
Additional images
The abdominal inguinal ring.
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The relations of the femoral and abdominal inguinal rings, seen from within the abdomen. Right side.
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References
- ^ Koliyadan S, Narayan G, Balasekran P (2004). "Surface marking of the deep inguinal ring". Clin Anat 17 (7): 554–7. doi:10.1002/ca.10257. PMID 15376291.
- ^ Kyung Won, PhD. Chung (2005). Gross Anatomy (Board Review). Hagerstown, MD: Lippincott Williams & Wilkins, 198. ISBN 0-7817-5309-0.
See also
External links
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
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General anatomy of torso |
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Thorax/
Thoracic cavity |
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| Thoracic diaphragm |
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Abdomen/
Abdominal cavity |
Retroperitoneum • Paracolic gutters • Hepatobiliary triangle
anterior abdominal wall (Arcuate line, Linea alba, Tendinous intersection, Linea semilunaris, McBurney's point, Traube's space, Inguinal triangle) • Inguinal canal (Deep inguinal ring, Superficial inguinal ring, Intercrural fibers, Crura of superficial inguinal ring) • Lumbar triangle • regions (Epigastrium, Hypochondrium, Umbilical region, Latus, Hypogastrium, Inguinal region) • planes (Transpyloric plane, Intertubercular plane, Midclavicular line)
fascia ( Fascia of Camper, Fascia of Scarpa, Transversalis fascia, Renal fascia, Rectus sheath)
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Pelvis/
Pelvic cavity |
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| Perineum |
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