Pump handle movement

Pump-handle is a movement of ribs that results in change in anteroposterior diameter of the thorax.[1]


One of the most important functions of ribs and diaphragm, is the change in volume of thorax that helps inspiration and expiration.[2] In general, the ribs move around two axes.[3] The anterior end of the rib is lower than the posterior end, therefore, during elevation of the rib, the anterior end also moves forwards. Movement at costovertebral joints 2 to 6 about a side-to-side axis results in raising and lowering the sternal end of the rib, the "pump-handle" movement.This occurs mostly in the vertebrosternal ribs. In elevation, this increases the anteroposterior diameter of the thorax.[4][5]

See also


  1. https://www.dartmouth.edu/~humananatomy/part_4/chapter_20.html
  2. Drake, Richard L.; Vogl, Wayne; Tibbitts, Adam W.M. Mitchell; illustrations by Richard; Richardson, Paul (2005). Gray's anatomy for students. Philadelphia: Elsevier/Churchill Livingstone. ISBN 978-0-8089-2306-0.
  3. https://www.dartmouth.edu/~humananatomy/part_4/chapter_20.html
  4. https://www.dartmouth.edu/~humananatomy/part_4/chapter_20.html
  5. http://www.dartmouth.edu/~humananatomy/figures/chapter_20/20-7.HTM

External links

This article is issued from Wikipedia - version of the 1/10/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.