Pronunciation (ilio-cock-se-GE E-us) Origin/Proximal Attachment Ischial spine & medial border of ischial body. Insertion/Distal Attachment Coccyx & anococcygeal ligament Action/Relevance Forms part of the pelvic floor to support pelvic viscera Innervation Nerves from S3, 4 & inferior rectal nerve | 
