All are true about Sibson's fascia EXCEPT
Sibson's 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.
Attached to inner border of first rib
Covers supraclavicular pa of lung
Modified inner pa of scalenus anterior
Attached to transverse process of C7
Neck Triangles and parotid gland