Bucket-handle is a movement of
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 change in transverse 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
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
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.
As the anterior end of ribs is about 4 cm lower than the posterior end, the middle part of rib is lower than anterior and posterior ends. Movement at
costovertebral joints
The costovertebral joints are the joints that connect the ribs to the vertebral column.
* The articulation of the head of rib connects the head of the rib and the bodies of vertebrae.
* The costotransverse joint connects the rib with the trans ...
7 to 10 about an anteroposterior axis results in raising and lowering the middle of the rib, the Bucket-handle movement. In elevation, this increases the transverse diameter of the thorax.
See also
*
Pump handle movement
Pump-handle is a movement of the ribs that results in a change in the anteroposterior diameter of the thorax.
Definition
One of the most important functions of the ribs and diaphragm is the change in volume of the thorax that helps inspiration ...
References
{{Reflist
Thorax (human anatomy)
Respiration