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Suprapleural membrane

Suprapleural membrane
Latin membrana suprapleuralis
Gray's p.1089
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Anatomical terminology

The suprapleural membrane, eponymously known as Sibson's fascia, is a structure described in human anatomy.

It is named for Francis Sibson.[1]


It refers to a thickening of connective tissue that covers the apex of each human lung. It is an extension of the endothoracic fascia that exists between the parietal pleura and the thoracic cage.

It attaches to the internal border of the first rib and the transverse processes of vertebra C7. It extends approximately an inch more superiorly than the superior thoracic aperture, because the lungs themselves extend higher than the top of the ribcage.

Clinical significance

Applied feature: Herniation of the cervical fascia may result due to injury to suprapleural membrane.

"The thoracic duct traverses Sibson's Fascia of the thoracic-inlet up to the level of C7 before turning around and emptying into the left (major) duct. The right (minor duct) only traverses the thoracic inlet once."[2]

Applied feature: Somatic dysfunction of Sibson's fascia can cause decreased lymphatic drainage from anywhere in the body.


  1. ^ synd/3597 at Who Named It?
  2. ^ p. 86, p 210, Kuchera, WA. "Osteopathic Considerations in Systemic Dysfunction"

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