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.
The Spine (more accurately reffered to as the Vertebral Column) is made up of 33 Vertebrae joined by Inververtebral Disks. These vertebrae are split into 5 regions accoording to their shape (only some details change but general structure is constant) and where they are in body. The uppermmost region is called the Cervical (Ser-vy_cl) region and it contains the top 7 vertebrae.