| Innermost intercostal muscle | |
|---|---|
 Innermost intercostal muscle (red), seen from back. | |
| Details | |
| Origin | Infero-posterior border of each rib (above) |
| Insertion | Supero-posterior border of the rib (below) |
| Artery | intercostal arteries |
| Nerve | intercostal nerves |
| Actions | Through adduction of upper ribs to the lower ribs the muscles narrow intercostal slits and diminish thorax volume, therefore the muscles represent expiratory muscles. |
| Identifiers | |
| Latin | musculus intercostalis intimus |
| TA98 | A04.4.01.014 |
| TA2 | 2313 |
| FMA | 74086 |
| Anatomical terms of muscle | |
The innermost intercostal muscle is a layer of intercostal muscles.[1] It may also be called the intima of the internal intercostal muscles.[2] It is the deepest muscular layer of the thorax,[3] with muscle fibres running vertically (in parallel with the internal intercostal muscles).[2] It is present only in the middle of each intercostal space, and often not present higher up the rib cage.[3] It lies deep to the plane that contains the intercostal nerves and intercostal vessels, and the internal intercostal muscles.[3][4] The diaphragm is continuous with the innermost intercostal muscle.[5]
Additional images
Innermost intercostal muscle (shown in red). Animation.
A cutout of the thoracic wall showing the three layers of intercostal muscle - from the left wall.
References
- ↑ Rahangdale, Rohit; Tureanu, Luminita; Benzon, Honorio T. (2018-01-01), Benzon, Honorio T.; Raja, Srinivasa N.; Liu, Spencer S.; Fishman, Scott M. (eds.), "Chapter 83 - Truncal Blocks: Paravertebral, Intercostal, Pectoral Nerve, Suprascapular, Ilioinguinal, Iliohypogastric Nerve, and Transversus Abdominis Plane Blocks", Essentials of Pain Medicine (Fourth Edition), Elsevier, pp. 779–788.e2, doi:10.1016/b978-0-323-40196-8.00083-8, ISBN 978-0-323-40196-8, retrieved 2020-11-23
- 1 2 Bland, Kirby I.; Copeland, Edward M.; Klimberg, V. Suzanne (2018-01-01), Bland, Kirby I.; Copeland, Edward M.; Klimberg, V. Suzanne; Gradishar, William J. (eds.), "2 - Anatomy of the Breast, Axilla, Chest Wall, and Related Metastatic Sites", The Breast (Fifth Edition), Elsevier, pp. 20–36.e2, doi:10.1016/b978-0-323-35955-9.00002-7, ISBN 978-0-323-35955-9, retrieved 2020-11-23
- 1 2 3 Rakovich, George; Fréchette, Éric; Deslauriers, Jean (2010-01-01), Lewis, Michael I.; McKenna, Robert J.; Falk, Jeremy A.; Chaux, George E. (eds.), "8 - Thoracic Surgical Anatomy and Procedures", Medical Management of the Thoracic Surgery Patient, Philadelphia: W.B. Saunders, pp. 95–105, doi:10.1016/b978-1-4160-3993-8.00008-8, ISBN 978-1-4160-3993-8, retrieved 2020-11-23
- ↑ Jacob, S. (2008-01-01), Jacob, S. (ed.), "Chapter 3 - Thorax", Human Anatomy, Churchill Livingstone, pp. 51–70, ISBN 978-0-443-10373-5, retrieved 2020-11-23
- ↑ Carreiro, Jane E (2009-01-01), Carreiro, Jane E (ed.), "Chapter 5 - The respiratory system", An Osteopathic Approach to Children (Second Edition), Edinburgh: Churchill Livingstone, pp. 85–100, doi:10.1016/b978-0-443-06738-9.00005-8, ISBN 978-0-443-06738-9, retrieved 2020-11-23
External links
Wikimedia Commons has media related to Innermost intercostal muscles.
- Anatomy photo:18:04-0103 at the SUNY Downstate Medical Center - "Thoracic Wall: The Intercostal Nerve and Vessels"
- Anatomy figure: 18:03-04 at Human Anatomy Online, SUNY Downstate Medical Center - "Transverse section of thorax."
- thoraxmuscles at The Anatomy Lesson by Wesley Norman (Georgetown University)
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