Notes

The median nerve is a nerve in humans and other animals in the upper limb. It is one of the five main nerves originating from thebrachial plexus.
Carpal tunnel syndrome is the disability that results from the median nerve being pressed in the carpal tunnel.The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals.controls your thoughts and actionsThe intercostal nerves are part of the somatic nervous system, and arise from the anterior roots of the thoracic spinal nerves from T1 to T11. The intercostal nerves are distributed chiefly to the thoracic pleura and abdominalperitoneum and differ from the anterior roots of the other spinal nerves in that each pursues an independent course without plexus formation.The lumbar plexus is a web of nerves (anervous plexus) in the lumbar region of the body which forms part of the largerlumbosacral plexus. It is formed by thedivisions of the first four lumbar nerves (L1-L4) and from contributions of the subcostal nerve (T12), which is the last thoracic nerve. In the leg, the deep peroneal nerve supplies muscular branches to the tibialis anterior,extensor digitorum longus, peroneus tertius, and extensor hallucis longus (propius), and an articular branch to the ankle-joint.
The musculocutaneous nerve arises from thelateral cord of the brachial plexus, opposite the lower border of the pectoralis major
The brachial plexus is responsible forcutaneous and muscular innervation of the entire upper limb, with two exceptions: thetrapezius muscle innervated by the spinal accessory nerve (CN XI) and an area of skin near the axilla innervated by theintercostobrachial nerve