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

- 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 ...

A doctor detailed the injury that St. Louis Blues Forward Dylan Holloway suffered against Tampa Bay on Tuesday night.