Amitabh Gupta, Brad Fernihough, Glen Bailey, Petra Bombeck
Slide One
This slide shows some of the complex fascial attachments that surround psoas. The basic anatomy of the muscle can be seen here.
It is seen to originate from the vertebral bodies, also having lesser attachment to the IV discs, from L1 to L5, with a slip arising also from T12, and, deeper still, the anterior and inferior aspects of their transverse processes, merging with the muscle fibres of iliacus 1cm below the ASIS.
The digitations that are commented on in the literature are not plainly evident here.
We can see the fascial arch that has been described in the literature as an 'anchoring' retinaculum at the lumbo-sacral junction which is proposed to maintain the line of pull of the PM along the vertebral segments independent of the position of the lumbar spine This guiding tissue has been referred to as the 'fascia psoica'
