m. sternocleidomastoid

this is part 1 of the physiotherapy project with sara

 

The m. sternocleidomastoid passes obliquely across the side of the neck.

 

It is thick and narrow at its central part, but broader and thinner at either end.

 

origin:

manubrium sterni, medial portion of the clavicle

 

insertion:

mastoid process of the temporal bone, superior nuchal line

 

action:

Acting alone, tilts head to its own side and rotates it so the face is turned towards the opposite side.

 

Acting together, flexes the neck, raises the sternum and assists in forced inspiration.

Done