What is the distribution of the median nerve?
What is the distribution of the median nerve?
The median nerve is a sensory and motor nerve of the arm (or upper limb). It arises from the lateral and medial cords of the brachial plexus, originating in the spinal cord, and runs through the anterior portion of the arm and forearm before finishing its path at the hand and digits (fingers).
What muscle does the median nerve Pierce?
Just before it enters the forearm, the median nerve passes between the tendons of biceps brachii and brachialis. At this point it again becomes lateral to the brachial artery. Next, in order to gain access to the forearm, it passes between the deep and superficial heads of the pronator teres muscle.
What does the radial nerve do?
The radial nerve travels down the arm and supplies movement to the triceps muscle at the back of the upper arm. It also provides extension to the wrist, and helps in movement and sensation of the wrist and hand.
What does the radial nerve supply?
The radial nerve is a nerve in the human body that supplies the posterior portion of the upper limb. It innervates the medial and lateral heads of the triceps brachii muscle of the arm, as well as all 12 muscles in the posterior osteofascial compartment of the forearm and the associated joints and overlying skin.
Where does median nerve supply the radial nerve?
Median nerve passes through the carpal tunnel beneath the flexor retinaculum, and divides to form two common palmar digital nerves, the first of which supplies the radial two lumbricals and a common branch between the index and middle fingers.
What is the motor presentation of radial nerve injury?
The most well-known motor presentation of the radial nerve injury is the ” wrist drop “. It occurs due to the paralysis of the posterior forearm muscles and their inability to extend the wrist. The sensory loss will depend on the anatomical location of the injury.
Where does the radial nerve supply the wrist extensor muscles?
Radial nerve (green) – anterior view. At the level of the elbow, the nerve then passes into the supinator muscle, where it divides into a deep and superficial branch: The deep branch becomes the posterior interosseus nerve, and descends down the posterior forearm, to supply all of the wrist extensor muscles.
What is radial tunnel syndrome?
Classically posterior interosseousnerve entrapment is known as radialtunnel syndromeThe radial tunnel begins shortly after thebifurcation of the radial nerve 8.
