Liver spots are flat, brown or black spots that can appear on areas of the skin that are exposed to the sun. They have nothing to do with the liver or liver function. Liver spots are changes in skin color that occur in older skin. The coloring may be due to aging, exposure to the sun or other sources of ultraviolet light, or causes that are not known. Liver spots are very common after age 40. They occur most often on areas that have had the greatest sun exposure, such as the: Backs of the hands.
Median nerve. In the upper arm and near the shoulder, the median nerve branches off of the brachial plexus. It initially spans the length of the upper arm, as it runs a course parallel to the brachial artery. A portion of its path covers the medial side of the arm, near both the biceps brachii and brachialis muscle.
The cervical plexus is a plexus of the ventral rami of the first four cervical spinal nerves which are located from C1 to C4 cervical segment in the neck.They are located laterally to the transverse processes between prevertebral muscles from the medial side and vertebral (m.lan of the cervical plexus. The nerves of the scalp, face, and side of neck. The right sympathetic chain and its connections with the thoracic, abdominal, and pelvic plexuses. Side of neck, showing chief surface markings.