Assertion: mastoid process | /r/CapableOf | extend the head
Facets:
Source sentences:
text: , by two heads from anterior surface of manubrium of the sternum and sternal end of clavicle;, mastoid process and lateral half of superior nuchal line;, turns head obliquely to opposite side; when acting together, flex the neck and extend the head;, motor by accessory, sensory by cervical plexus.