external intercostal (muscle)
Definition: flat muscle of thorax arising from lower border of one rib and passing obliquely downward and forward to be inserted into the upper border of rib below; action, contract during inspiration to elevate ribs; also to maintain tension in the intercostal spaces to resist inward movement during inspiration; nerve supply, intercostal.
Synonym(s): musculus intercostales externiTA
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.