Sternocleidomastoid muscle

Sternocleidomastoid muscle

sternocleidomastoid muscle head lifter sternocleidomastoid muscle sternocleidomastoid muscle

Forward, forward, bow, head tilt functions Innervation of the accessory nerve and fibers from C2–C4 The beginning of the manubrium sterni, extremitas sternalis claviculae Attachment of processus mastoideus, linea nuchalis superior Beginning: the upper edge of the front part of the manubrium sterni, the upper surface of the extremitas sternalis claviculae.

Attachment: processus mastoideus, lateral part of linea nuchalis superior.

Innervation: accessory nerve and fibers from C2–C4.

Function:

tilting the head to the same side and rotating to the opposite (unilateral contraction); head advance and tilt (bilateral contraction); back sheaf head tilt. Wedge: when the sternocleidomastoid muscle is shortened, there is an imaginative tilting of the head to the ipsilateral side of the affected muscle and rotation to the opposite side. The condition is called torticollis.

Links References CIHÁK, Radomír. Anatomy 1st 2nd ed. Prague: Grada, 2001. 497 pp. ISBN 80-7169-970-5.