Contents
- 1 Where does the radial nerve enter the hand?
- 2 Where does the radial nerve go at the wrist?
- 3 Where does the radial nerve come out of the spine?
- 4 How deep down is the radial artery?
- 5 Where does the radial nerve start and end?
- 6 Is the radial nerve the same as the brachial artery?
- 7 What are the motor and sensory functions of the radial nerve?
Where does the radial nerve enter the hand?
In the distal forearm it passes backwards and emerges from beneath the brachioradialis tendon Approaching the wrist it crosses over extensor pollicis brevis, and longus, to reach the back of the hand. The superficial branch of the radial is entirely a sensory nerve.
Where does the radial nerve go at the wrist?
What is the radial nerve? The radial nerve runs down the underside of your arm and controls movement of the triceps muscle, which is located at the back of the upper arm. The radial nerve is responsible for extending the wrist and fingers. It also controls sensation in part of the hand.
Which artery travels with the radial nerve?
Blood Supply and Lymphatics Radial Recurrent artery – Originates below the origin of the radial artery, typical on the lateral aspect and travels proximally between the branches of the radial nerve, to anastomose with the radial collateral artery, a branch of the deep artery of the arm.
Where does the radial nerve come out of the spine?
The radial nerve is formed from the C5, C6, C7, C8 and T1 nerve roots of the brachial plexus. The brachial plexus is a group of nerves that branches from the cervical spine (neck). The brachial plexus travels under the clavicle and through the armpit (axilla).
How deep down is the radial artery?
The anterior wall of the typical radial artery is 3 mm under the skin, so a lot of depth is not necessary.
Where can the radial nerve be compressed?
Radial nerve entrapment is an uncommon diagnosis that is prone to under-recognition. Compression or entrapment can occur at any location within the course of the nerve distribution, but the most frequent location of entrapment occurs in the proximal forearm.
Where does the radial nerve start and end?
Radial nerve of the right axilla, posterior view. The radial nerve originates as a terminal branch of the posterior cord of the brachial plexus. It goes through the arm, first in the posterior compartment of the arm, and later in the anterior compartment of the arm, and continues in the posterior compartment of the forearm.
Is the radial nerve the same as the brachial artery?
The radial nerve follows the same path as the profunda brachii branch of the brachial artery. It leaves the spiral or radial groove in the bone as it descends. It supplies brachioradialis when it emerges anterior to the lateral epicondyle, which is a supinator of the forearm.
How is the radial nerve damaged in the shoulder?
The radial nerve can be damaged in the axilla region by a dislocation at the shoulder joint, or a fracture of the proximal humerus. Occasionally, it is injured via excessive pressure on the nerve within the axilla (e.g. a badly fitting crutch). Motor functions – the triceps brachii and muscles in posterior compartment are affected.
What are the motor and sensory functions of the radial nerve?
Motor functions – the triceps brachii and muscles in posterior compartment are affected. The patient is unable to extend at the forearm, wrist and fingers. Unopposed flexion of wrist occurs, known as wrist-drop. Sensory functions – all four cutaneous branches of the radial nerve are affected.