What is the action of the scalenes?
What is the action of the scalenes?
Function. The action of the anterior and middle scalene muscles is to elevate the first rib, they also flexes and laterally bends the neck to same side. The action of the posterior scalene is to elevate the second rib and tilt the neck to the same side.
Where do the scalene muscles insert?
The anterior scalene originates from the anterior tubercles of the transverse processes of the cervical vertebrae, from the third to the sixth vertebrae. It is inserted into the scalene muscle tubercle of the upper face of the first rib. Some fibers of the anterior scalene can touch the pleural dome.
What is the insertion of the anterior scalene?
Insertion. By a narrow, flat tendon attaches into the scalene tubercle on the inner border of the first rib, and into the ridge on the upper surface of the rib in front of the subclavian groove.
Which is the insertion of the posterior scalene?
second rib
It arises, by two or three separate tendons, from the posterior tubercles of the transverse processes of the lower two or three cervical vertebrae, and is inserted by a thin tendon into the outer surface of the second rib, behind the attachment of the anterior scalene.
Which is the insertion of the middle scalene?
Middle Scalene, AKA Scalenus Medius (Latin: musculus scalenus medius), is the largest and longest muscle in the scalene group of lateral neck muscles. Often penetrated by the dorsal scapular and long thoracic nerves, it is deeply placed, lying behind Sternocleidomastoid.
Which is the origin of the posterior scalene?
| Scalene muscles | |
|---|---|
| Origin | Cervical vertebrae (CII-CVII) |
| Insertion | First and second ribs |
| Artery | Ascending cervical artery (branch of Inferior thyroid artery) |
| Nerve | Cervical nerves (C3-C8) |
What is the origin of the posterior scalene?
It arises, by two or three separate tendons, from the posterior tubercles of the transverse processes of the lower two or three cervical vertebrae, and is inserted by a thin tendon into the outer surface of the second rib, behind the attachment of the anterior scalene. It is supplied by cervical nerves C5, C6 and C7.
Which is the origin of the posterior scalene quizlet?
origin- posterior tubercles of the transverse processes of 2nd through 7th cervical vertebrae. You just studied 3 terms!
Which of the following is an action of the middle scalene?
Middle scalene can act with anterior and posterior scalene muscles or individually: – When scalenes act together – neck flexes (flexors) Also, they elevate the 1st rib (and thorax) during a strong inhalation which is why they are called accessory muscles of inspiration.
