Scalene muscles Flashcards
What are the different parts to the Scalene muscles?
anterior
middle
posterior
What is the origin of all the scalene muscles?
TV C3-C7
Where does the anterior scalene insert?
anteriorly rib 1
Where does the middle scalene insert?
posteriorly rib 1
Where does the posterior scalene insert?
rib 2
What is the action of the Scalene muscles?
raise the rib
if rib is fixed side bend the neck
Where does the brachial plexus, cervical plexus and subclavian artery travel in relation to the scalene M?
between the anterior and middle scalene
Where does the phrenic nerve travel in relation to the scalene M.?
anterior surface of anterior scalene
What is thoracic outlet syndrome?
what arteries nerves are veins are crushed in the narrow space between the clavicle and first rib
How is thoracic outlet syndrome caused?
Hypertrophy of the anterior and middle scalene muscles
overstrengthning of the pectoral M
