Outer ear: The part of the ear that is visible along the side of the head. The outer ear consists of the pinna, or auricle (the visible projecting portion of the ear), the external acoustic meatus (the outside opening to the ear canal), and the external ear canal, which leads to the eardrum. The outer ear concentrates air vibrations on the eardrum to make the eardrum vibrate. Search MedTerms:
The muscles of mastication control chewing and include the temporalis, masseter, digastric, and the -glossus muscles of the tongue. Finally, the neck muscles include the sternocleidomastoid and splenius muscles, which move the head.
It's part of a long neck muscle called the sternocleidomastoid that goes from the mastoid process at the mastoid bone to the sternum and clavicle. This muscle rotates the head and neck. The sternal head comes from the upper part of the anterior ... Click to read more below.