Question

About Sibson’s fascia which is incorrect:

• A. Attached to the inner border of 2nd rib
• B. Covers apical part of lung
• C. Part of scalenus anterior muscle
• D. Vessel pass above the fascia

Answer 1

The Correct Option is A

Sibson's fascia, also known as the suprapleural membrane, is an important anatomical structure in the thoracic region. Here's an explanation of its features to identify the incorrect statement about Sibson's fascia:

• Not attached to the inner border of 2nd rib: This statement is false. Sibson's fascia is not attached to the inner border of the 2nd rib; instead, it is located at the thoracic inlet above the 1st rib.
• Covers apical part of lung: This statement is true. Sibson's fascia extends over the apex of the lung, providing a protective covering.
• Part of scalenus anterior muscle: This statement is partly true as Sibson's fascia is continuous with the fascial layer covering the scalenus anterior, although it is not considered a direct part of the scalenus anterior muscle.
• Vessel pass above the fascia: This statement is true. Major vessels like the subclavian artery and vein traverse above Sibson's fascia as they enter and exit the thorax.

Therefore, the incorrect statement about Sibson's fascia is that it is "Attached to the inner border of 2nd rib".