The Lesser or Anterior Sacro-sciatic Ligament, much shorter ano. smaller
than the preceding, is thin, triangular in form, attached by its apex to the spine of the ischium, and internally, by its broad base, to the lateral margin of the sacrum and coccyx, anterior to the attachment of the great sacro-sciatic ligament with which its fibres are intermingled.
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It is in relation, anteriorly, with the
Coccygeus muscle; poste1'iorly, it is covered
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by the great sacro-sciatic ligament and crossed by
the internal pudic vessels and nerve. Its superior border forms the
lower boundary of the great sacro-sciatic foramen; its inferi01' border, part of the
lesser sacro-sciatic foramen.
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