Anatomy: The muscles on the back of the upper arm (brachium) comprise the 3-headed arm stretcher (M triceps brachii). The muscle primarily stretches the elbow joint (and the shoulder joint). 1  Clavicula.  Bursa subcutanea acromialis.
Overview. The cervical spine is made up of 7 vertebrae. The first 2, C1 and C2, are highly specialized and are given unique names: atlas and axis, respectively. C3-C7 are more classic vertebrae, having a body, pedicles, laminae, spinous processes, and facet joints.
You have chosen to learn more about the Anatomy of the Spine. The spine is divided up into three major sections: the cervical, or neck, area; the thoracic section at chest level, and the lumbar spine of the lower back. When seen from the side, the three sections form the natural curves of the spine. When viewed from back to front, a healthy spinal column forms a straight line. Each section is made up of individual bones called vertebrae. There are 7 cervical, 12 thoracic, and 5 lumbar vertebrae. Each vertebra has a hole in the center of it, so when they are stacked on top of each other they form a hollow tube that protects the spinal cord and its nerve roots.