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1. The suprapleural membrane is a dense fascial layer that is attached to the inner border of the first rib and costal cartilage anteriorly, C7 transverse process posteriorly and to the mediastinal pleura medially.

2. It is flat and lies in the oblique plane of the thoracic inlet (the root of the neck is floored in by this membrane), with a cervical dome of pleura attached to its under surface.

3. Lying on it are the subclavian vessels and other structures in the root of the neck.

4. The function of the membrane is to provide rigidity to the thoracic inlet that prevents distortion due changes in intrathoracic pressure that occur during respiration.


1. Mcminn. (2003). Last's Anatomy. Elsevier Australia. ISBN:0729537528. Read it at Google Books - Find it at Amazon
2. Netter, F. H. (2019). Atlas of human anatomy. Philadelphia, PA: Elsevier.
3. Image: no reference available.

Ⓒ A. Manickam 2018

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