What is the origin of the radial nerve?
The radial nerve originates from the posterior cord of the brachial plexus with root values of C5 to C8 and T1. From the brachial plexus, it travels behind the third part of the axillary artery (part of the axillary artery distal to the pectoralis minor).
Which muscles are supplied by radial nerve?
The radial nerve and its branches provide innervation the following muscles (See Structure and Function for specific nerve branch innervations and muscle actions)[7]:
- Abductor pollicis longus.
- Anconeus.
- Brachioradialis.
- Extensor carpi radialis brevis.
- Extensor carpi radialis longus.
- Extensor carpi ulnaris.
Where is the radial nerve located?
The radial nerve is one of the major nerves of the upper extremity. Forming in the area of the shoulder joint at the confluence of several branches of the brachial plexus, the radial nerve courses down the arm, past the elbow joint, into the forearm, across the wrist, and all the way to the tips of your fingers.
Which plexus does the radial nerve originate from?
Origin. The radial nerve is one of two terminal branches of the posterior cord of the brachial plexus.
What are the 5 major nerve Innervations of shoulder arm?
The fifth and final level of the brachial plexus are the five nerves that feed the shoulder and arm called “branches.” These five branches are named the musculocutaneous, axillary, radial, median, and ulnar nerves.
How do you test radial nerve?
How to assess the peripheral nerves of the hand – YouTube
Where is the radial nerve most likely to be damaged?
A radial nerve injury refers to damage to the nerve in the upper arm. This nerve controls the triceps muscle. It also helps extend the wrist and fingers and provides sensation in part of the hand. The radial nerve is close to the bone in the upper arm, so it is vulnerable to injury, especially if the arm breaks.
How do you test for radial nerve?
How to test the Radial Nerve from C5-T1 of the Brachial Plexus
What nerve supplies the rotator cuff?
The suprascapular nerve comes off the upper trunk, from roots C5-C6, and innervates the supraspinatus and infraspinatus, which are contributors to the rotator cuff apparatus.
What happens when radial nerve is damaged?
Radial neuropathy occurs when there is damage to the radial nerve, which travels down the arm and controls: Movement of the triceps muscle at the back of the upper arm. Ability to bend the wrist and fingers backward. Movement and sensation of the wrist and hand.
What fingers are affected by the radial nerve?
Symptoms. Symptoms of radial nerve injury may include pain, numbness, and/or paresthesia, especially in the middle finger, index finger, thumb, back of the hand, and/or arm. Wrist drop and finger drop may also be present. Exact symptoms depend on the location and type of injury.
What fingers does the radial nerve control?
The radial nerve gives feeling to the skin on the outside of the thumb and on the back of the hand and the index finger, middle finger, and half of the ring finger.
How is radial nerve damaged?
The most common causes of radial nerve injury are breaking your arm, overusing your arm, and sports and work accidents. Depending on the level of injury, you may experience a complete laceration of the radial nerve. This occurs when the nerve is severed. It can cause symptoms that are similar to more minor injuries.
What are the symptoms of radial nerve damage?
Symptoms. Symptoms of radial nerve injury may include pain, numbness, and/or paresthesia, especially in the middle finger, index finger, thumb, back of the hand, and/or arm. Wrist drop and finger drop may also be present.
Which nerve is responsible for shoulder pain?
The axillary nerve starts in your neck and extends to your shoulder. It causes movement and sensation in your shoulder and the back of your upper arm. Injuries to this nerve can affect your ability to rotate your arm or lift it.
How do you test for radial nerve damage?
An EMG measures the electrical activity in your muscle. A nerve conduction test measures the speed at which impulses travel along your nerves. These tests can help determine if you are experiencing a problem in your nerve or in your muscle. They may also show whether the radial nerve is damaged.
What does radial nerve pain feel like?
A radial nerve injury usually causes symptoms in the back of your hand, near your thumb, and in your index and middle fingers. Symptoms may include a sharp or burning pain, as well as unusual sensations in your thumb and fingers. It’s common to experience numbness, tingling, and trouble straightening your arm.