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.
Neck muscles are bodies of tissue that produce motion in the neck when stimulated. The muscles of the neck run from the base of the skull to the upper back and work together to bend the head and assist in breathing.The motion of the muscles of the neck are divided into four categories: rotation, lateral flexion, flexion, and hyperextension.eck muscles are bodies of tissue that produce motion in the neck when stimulated. The muscles of the neck run from the base of the skull to the upper back and work together to bend the head and assist in breathing.