Pump-handle is a movement of the
rib
In vertebrate anatomy, ribs () are the long curved bones which form the rib cage, part of the axial skeleton. In most tetrapods, ribs surround the thoracic cavity, enabling the lungs to expand and thus facilitate breathing by expanding the ...
s that results in a change in the anteroposterior diameter of the
thorax
The thorax (: thoraces or thoraxes) or chest is a part of the anatomy of mammals and other tetrapod animals located between the neck and the abdomen.
In insects, crustaceans, and the extinct trilobites, the thorax is one of the three main di ...
.
[ ]
Definition
One of the most important functions of the
rib
In vertebrate anatomy, ribs () are the long curved bones which form the rib cage, part of the axial skeleton. In most tetrapods, ribs surround the thoracic cavity, enabling the lungs to expand and thus facilitate breathing by expanding the ...
s and
diaphragm is the change in volume of the
thorax
The thorax (: thoraces or thoraxes) or chest is a part of the anatomy of mammals and other tetrapod animals located between the neck and the abdomen.
In insects, crustaceans, and the extinct trilobites, the thorax is one of the three main di ...
that helps
inspiration and
expiration
Expiration or expiration date may refer to:
Expiration
Expiration may refer to:
*Death
*Exhalation of breath, breathing out
* Expiration (options), the legal termination of an option to take an action
*Shelf life, or the time after which a product ...
. In general, the ribs move around two axes.
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.
[ ]
See also
*
Bucket handle movement
Bucket-handle is a movement of ribs that results in change in transverse diameter of the thorax.
Definition
One of the most important functions of ribs and Thoracic diaphragm, diaphragm is the change in volume of thorax that helps inhalation, insp ...
References
*http://www.duhs.edu.pk
{{Reflist
External links
Thorax (human anatomy)
Respiration