obturator canal


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Related to obturator canal: obturator foramen, obturator nerve

ob·tu·ra·tor ca·nal

[TA]
passage through the obturator foramen via an opening in the superior part of the obturator membrane through which the obturator nerve and vessels pass from the pelvic cavity into the thigh.
Synonym(s): canalis obturatorius [TA]

ob·tu·ra·tor ca·nal

(ob'tŭr-ā-tŏr kă-nal') [TA]
The opening in the superior part of the obturator membrane through which the obturator nerve and vessels pass from the pelvic cavity into the thigh.
Synonym(s): canalis obturatorius [TA] .

obturator canal

An opening in the obturator membrane of the hip bone that transmits the obturator vessels and nerve.
See also: canal
References in periodicals archive ?
It arises from: i) the margins of the obturator foramen, ii) pubic and ischial rami, and iii) the external surface of the obturator membrane, the tendinous aponeurotic arch which completes the obturator canal. The muscle passes inferior to the acetabulum to attach to the trochanteric fossa.
The superior free edges of the obturator internus muscle and its fascia, the obturator membrane (between the anterior and posterior obturator tubercles), and the obturator externus muscle and its fascia collectively form the musculotendinous aponeurotic arch which converts the obturator groove into an obturator canal. The direction of the canal is i) from superior to inferior, ii) from lateral to medial, and iii) from posterior to anterior.
The contents of the obturator canal include: i) superomedially, nerve to obturator externus muscle, and obturator artery, ii) inferomedially, obturator vein, and iii) superolaterally, anterior and posterior divisions of the obturator nerve, which lay within the obturator groove.
Within the obturator canal, the posterior division of the obturator nerve is bound superiorly by the anterior division of the nerve, and inferiorly by the obturator artery and the nerve to obturator externus muscle.
The obturator canal is a defect in the tendinous insertion of the obturator internus muscle onto the posterior aspect of the superior pubic ramus, which is a passage way for the obturator neurovascular bundle (Fig.
(3) With the nickname of 'little old lady's hernia', it usually occurs in multiparous and emaciated women due to wide pelvis and enlarged obturator canal. Risk factors are COPD, Ascites and Chronic constipation.