This site is intended for healthcare professionals

Go to /sign-in page

You can view 5 more pages before signing in

Intercostals (innermost, anatomy)

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

The innermost intercostal muscles are the deepest of the three intercostal muscle groups within each intercostal space. They are separated from the internal intercostal muscles by the neurovascular bundles of each space.

Each innermost intercostal arises from the internal, inferior surface of the rib that lies superiorly within each interspace. It inserts into the internal, superior surface of the rib that lies immediately inferiorly.

The innermost intercostals are innervated by collateral branches of the first to eleventh intercostal nerves. They act to fix the position of the ribs during respiration.


Related pages

Create an account to add page annotations

Add information to this page that would be handy to have on hand during a consultation, such as a web address or phone number. This information will always be displayed when you visit this page