ischiococcygeus (coccygeus)

Introduction

Striated pelvic muscle associated with the pelvic aspect of the sacrospinous ligament, forming part of the pelvic diaphragm.

Origin

spine of the ischium & sacrospinous ligament

Insertion

• sides of the lower part of the sacrum & upper part of the coccyx

Action

• in connection with the sacrospinous ligament, assists in support of the pelvic floor

Innervation

3rd & 4th sacral nerves

More general terms

• skeletal muscle (voluntary muscle)

Additional terms

• levator ani (ilio- & pubococcygeus {puborectalis})
• pelvic diaphragm; urogenital diaphragm; pelvic floor