median nerve
The median nerve is responsible for both sensation and movement in the hand, in particular the thumb and first three fingers.
The nerve located on the top of the hand, known as the radial nerve, is responsible for providing sensation and controlling movement in the back of the hand, thumb, and fingers.
The radial nerve supplies the muscles of the arm and forearm and and is also the sensory nerve for the upper limb. It therefore helps in the movement of the upper limb and is also partly responsible for sensory feeling in part of the arm, forearm and hand.
The nerves in the top of the hand are responsible for providing sensation and controlling movement in the fingers and hand.
The median nerve, this nerve supplies feeling and movement to the thumb and "thumb-side" of the hand.
The radial nerve supplies the muscles of the arm and forearm and and is also the sensory nerve for the upper limb. It therefore helps in the movement of the upper limb and is also partly responsible for sensory feeling in part of the arm and forearm and hand
The median nerve supplies most of the muscles in the hand. It innervates the muscles responsible for flexing the wrist and fingers, as well as the muscles that control the thumb.
The ulnar nerve is one of the major nerves of the arm, primarily responsible for controlling the muscles of the forearm and hand. It innervates the intrinsic muscles of the hand, particularly those responsible for fine motor skills, as well as some muscles in the forearm. Its sensory function includes providing sensation to the skin of the little finger and half of the ring finger. Damage to the ulnar nerve can result in weakness, numbness, or tingling in these areas, often referred to as "cubital tunnel syndrome."
The little finger of the left hand is primarily innervated by the ulnar nerve. This nerve provides sensation to the skin of the little finger and the adjacent half of the ring finger, as well as motor innervation to the intrinsic muscles of the hand that control fine movements.
The specific muscles and tendons in the hand responsible for fine motor movements and grip strength include the flexor digitorum profundus, flexor digitorum superficialis, flexor pollicis longus, and the extensor digitorum. These muscles work together with the tendons to control the movement of the fingers and thumb, allowing for precise movements and a strong grip.
The back of the hand contains approximately 1,500 to 2,000 nerve endings per square inch. These nerve endings are responsible for sensing touch, temperature, and pain, contributing to the hand's sensitivity. The density of nerve endings varies across different areas of the body, with the fingertips having a higher concentration than the back of the hand.
Movement centers of the brain are responsible for your hand going up. If it's your right hand, the left brain is responsible and if it's your left hand, the right brain is responsible.