You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is All are true about Sibson's fascia EXCEPT and explain in detail?
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.