What nerves supply the upper limb?
What nerves supply the upper limb?
The nerve supply to the upper limb is almost entirely supplied by the brachial plexus, a complex intercommunicating network of nerves formed in the neck by spinal nerve roots C5, C6, C7, C8 and T1. The brachial plexus itself in more detail in a separate article here.
Which nerves supply the muscles of the upper arm?
The axillary nerve innervates the deltoid and teres minor. The musculocutaneous nerve is responsible for innervating the flexors of the arm, including the biceps brachii, coracobrachialis, and the medial aspect of the brachialis.
Which nerves innervate the muscles?
The lateral and medial cords communicate with each other via the lateral and medial pectoralis nerves. These nerves innervate both the pectoralis major and minor muscles. The upper and lower subscapular nerves come from the posterior cord.
Which muscles of upper limb have dual nerve supply?
The composite flexor digitorum profundus muscle has a dual nerve supply from the ulnar nerve (UN) and the anterior interosseous nerve (AIN) but anatomic data regarding the territories of these 2 nerves are limited.
How do you remember your upper limb nerves?
More videos on YouTube
- Introduction. Upper extremity nerve injuries may occur secondary to humerus fractures.
- The “ARM” Mnemonic. The “ARM” mnemonic is simple to use.
- A = Axillary Nerve. “A” stands for “Axillary” nerve.
- R = Radial Nerve. “R” stands for “Radial” nerve.
- M = Median Nerve.
- Conclusion.
How many arteries are in the upper limb?
In terms of arterial supply, the upper limb has 5 main vessels, the: subclavian, axillary, brachial, radial, and ulnar arteries. The subclavian, axillary and brachial arteries are continuous with one another, with the brachial artery bifurcating into the radial and ulnar arteries which later converge in the hand.
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.
What are the three main nerves in your arm?
Three main nerves run past the elbow and wrist to the hand.
- Median nerve. This nerve passes down the inside of the arm and crosses the front of the elbow.
- Ulnar nerve. This nerve passes down the inside of the arm.
- Radial nerve. This nerve passes down the back and outside of the upper arm.
What are the 4 types of nerves?
These nerves control the involuntary or partially voluntary activities of your body, including heart rate, blood pressure, digestion, and temperature regulation. Motor nerves. These nerves control your movements and actions by passing information from your brain and spinal cord to your muscles. Sensory nerves.
What are hybrid muscles of upper limb?
e.g. Brachialis, Adductor magnus, Biceps femoris, Pectineus, Quadriceps femoris,Flexor digitorum profundus, Iliopsoas Digastric muscle etc.
How many muscles are in your upper limb?
There are four muscles in the upper arm split into an anterior and posterior compartment.
What kind of nerves are in the upper limb?
There are 6 topics covered in the nerves of the upper limb, an overview of the brachial plexus and a more in-depth look into it’s 5 main branches: axillary, musculocutaneous, median, radial, and ulnar nerves. The brachial plexus is a collection of nerve fibres that supply motor and sensory innervation to the upper limb.
Where does sensory supply come from in the upper limb?
The sensory supply to the upper limb can be broken down into dermatomes (the area supplied by each spinal nerve root) and peripheral nerve territories. The best way to learn these, especially the complicated supply to the hand, is literally to draw it on yourselves or on each other!
Where are the nerves of the musculocutaneous nerve located?
Musculocutaneous nerve The musculocutaneous nerve is formed from the C5, C6, and C7 nerve roots of the brachial plexus. The brachial plexus is a group of nerves that branches from the neck (cervical spine). The brachial plexus travels under the clavicle and through the armpit (axilla).
Where does the nerve supply the extensor muscles?
Just above the wrist, the nerve pierces the deep fascia to supply a variable area of skin over the dorsal surface of the hand on the thumb side ( Figure 7.4 ). The posterior interosseous nerve supplies the extensor muscles in the forearm, ending at the wrist, where it supplies all of the joints of the wrist.