CLT The sternocleidomastoid (SCM) is a neck muscle that helps nod and rotate your head in many directions. Occasionally, ...

Persistent SCM muscle tightness or head preference make the neck folds more difficult to clean on the affected side.

- one of two thick muscles running from the sternum and clavicle to the mastoid and occipital bone; turns head obliquely to the opposite side; when acting together they flex the neck and extend the ...

Persistent SCM muscle tightness or head preference make the neck folds more difficult to clean on the affected side.