<prompt> All are true about Sibsons fascia EXCEPTAttached to inner border of first ribCovers supraclavicular pa of lungModified inner pa of scalenus anteriorAttached to transverse process of C7  <response>: Sibsons fascia is a modification of the endothoracic fascia in the supraclavicular region, covering the thoracic inlet. It is a degenerated tendon of scalenus minimus. Attachment : Transverse process of C7 veebra and inner border of 1st rib. It separates the subclan aery and vein running on the posterio superior surface of the first rib from the cervical pleura. 