Muscles
Attaches to the top of the manubrium of the sternum, medial 1/3 of the clavicle, and inserts on the mastoid process of the temporal bone
Sternocleidomastoid (SCM)
Difficulty with impulse control, movement, and distractibility
Attention Deficit Hyperactivity Disorder (ADHD)
Elevates the mandible and assist to protract the mandible
Masseter