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 ?
Dysmorphic osseous characteristics include colinearity of the upper portion of the sacrum and the iliac crests, noncircular anterior sacral foramina, residual upper sacral discs, etc.
Dysmorphic osseous characteristics of the sacrum include colinearity of the upper portion of the sacrum and the iliac crests, presence of mammillary bodies at the sacral ala, noncircular anterior sacral foramina, residual upper sacral discs etc.
Enlarged, scalloped anterior sacral foramina were observed consistent with neurofibromata (Fig.