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Human back. The human back, also called the dorsum ( pl.: dorsa ), is the large posterior area of the human body, rising from the top of the buttocks to the back of the neck. [1] It is the surface of the body opposite from the chest and the abdomen. The vertebral column runs the length of the back and creates a central area of recession.
The scapula ( pl.: scapulae or scapulas [1] ), also known as the shoulder blade, is the bone that connects the humerus (upper arm bone) with the clavicle (collar bone). Like their connected bones, the scapulae are paired, with each scapula on either side of the body being roughly a mirror image of the other. The name derives from the Classical ...
Trapezius. The trapezius muscle ( pl.: trapezii) is a surface muscle of back, shown in red above and below. The trapezius [4] is a large paired trapezoid -shaped surface muscle that extends longitudinally from the occipital bone to the lower thoracic vertebrae of the spine and laterally to the spine of the scapula.
The erector spinae is not just one muscle, but a group of muscles and tendons which run more or less the length of the spine on the left and the right, from the sacrum, or sacral region, and hips to the base of the skull. They are also known as the sacrospinalis group of muscles. These muscles lie on either side of the spinous processes of the ...
Muscles connecting the upper extremity to the vertebral column. Rhomboid major indicated in red. Retracts the scapula and rotates it to depress the glenoid cavity. It also fixes the scapula to the thoracic wall. The rhomboid major is a skeletal muscle of the back that connects the scapula with the vertebrae of the spinal column. [1]
The skeletal section of the head and neck forms the top part of the axial skeletonand is made up of the skull, hyoidbone, auditory ossicles, and cervical spine. The skull can be further subdivided into: the cranium(8 bones: frontal, 2-parietal, occipital, 2-temporal, sphenoid, ethmoid), and.
abducts, intorts, and depress eye. right medial, superior, and inferior recti (superior and inferior oblique muscles are the synergists) 2. 1. oblique, inferior. head, extraocular (left/right) orbital surface of maxilla, lateral to lacrimal groove. laterally onto eyeball, deep to lateral rectus, by a short flat tendon.
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