Serratus posterior inferior muscle

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Serratus posterior inferior muscle
Serratus posterior.PNG
Back muscles of man
11th thoracic to 3rd lumbar vertebrae
9-12 rib
Auxiliary inspirer
Nervi intercostales ( spinal nerves of the chest part of the spinal cord )
Spinal segments

The serratus posterior inferior muscle ( Latin for "rear lower saw muscle" or "rear lower saw tooth muscle") - referred to in animal anatomy as the serratus dorsalis caudalis muscle - is a skeletal muscle of the thorax . It arises from the eleventh thoracic to third lumbar vertebrae and has four points on the ninth to twelfth rib . In the human body's muscle fibers run from the originating obliquely laterally and cranially to the approach .

The contraction of the muscle pulls the lower ribs dorsally and caudally and thus counteracts a narrowing of the lower thorax and thus supports inspiration. Like the serratus posterior superior muscle, it is functionally part of the auxiliary inspiratory muscles . Some textbooks also see an expiratory effect.

Web links

Commons : Serratus posterior inferior muscles  - Collection of images, videos and audio files

supporting documents

  1. Michael Schünke among others: Prometheus learning atlas of anatomy. Head, Neck and Neuroanatomy. 3. Edition. Thieme Verlag, Stuttgart 2011, p. 164.
    Theodor Schiebler, Horst-Werner Korf: Anatomie. 10th edition. Steinkopff Verlag, 2007, p. 243.
    August Rauber, Friedrich Kopsch: Human anatomy: textbook and atlas. Volume 1, 2nd edition. Thieme Verlag, Stuttgart 1998, p. 282.
    Detlev Drenckhahn, Alfred Benninghoff: Anatomie. Macroscopic anatomy, histology, embryology, cell biology. Volume 1. 16th edition. Urban & Fischer Verlag, Munich 2003, p. 457.
    Gerhard Aumüller and others: Duale series anatomy. Georg Thieme Verlag, Stuttgart 2010, p. 236.
  2. ^ A b Herbert Lippert: Textbook Anatomy. 6th edition. Urban & Fischer Verlag, Munich 2003, p. 153.
  3. Ulrike Bommas-Ebert, Philipp Teubner, Rainer Voß: Short textbook anatomy and embryology. 3. Edition. Thieme Verlag, Stuttgart 2011, p. 142.