anterior sacral foramen

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anterior sacral foramen

One of the four paired openings on the anterior (ventral or pelvic) surface of the sacrum through which the first four pairs of ventral rami of the sacral nerve roots pass. (The fifth pair of sacral ventral rami pass between the sacrum and the coccyx.) The anterior sacral foramina connect to the sacral canal via the sacral interventricular foramina..
Synonym: ventral sacral foramen
See also: foramen
References in periodicals archive ?
Enlarged, scalloped anterior sacral foramina were observed consistent with neurofibromata (Fig.