Ulnar nerve

Jump to navigation Jump to search

Template:Infobox Nerve

WikiDoc Resources for Ulnar nerve


Most recent articles on Ulnar nerve

Most cited articles on Ulnar nerve

Review articles on Ulnar nerve

Articles on Ulnar nerve in N Eng J Med, Lancet, BMJ


Powerpoint slides on Ulnar nerve

Images of Ulnar nerve

Photos of Ulnar nerve

Podcasts & MP3s on Ulnar nerve

Videos on Ulnar nerve

Evidence Based Medicine

Cochrane Collaboration on Ulnar nerve

Bandolier on Ulnar nerve

TRIP on Ulnar nerve

Clinical Trials

Ongoing Trials on Ulnar nerve at Clinical Trials.gov

Trial results on Ulnar nerve

Clinical Trials on Ulnar nerve at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Ulnar nerve

NICE Guidance on Ulnar nerve


FDA on Ulnar nerve

CDC on Ulnar nerve


Books on Ulnar nerve


Ulnar nerve in the news

Be alerted to news on Ulnar nerve

News trends on Ulnar nerve


Blogs on Ulnar nerve


Definitions of Ulnar nerve

Patient Resources / Community

Patient resources on Ulnar nerve

Discussion groups on Ulnar nerve

Patient Handouts on Ulnar nerve

Directions to Hospitals Treating Ulnar nerve

Risk calculators and risk factors for Ulnar nerve

Healthcare Provider Resources

Symptoms of Ulnar nerve

Causes & Risk Factors for Ulnar nerve

Diagnostic studies for Ulnar nerve

Treatment of Ulnar nerve

Continuing Medical Education (CME)

CME Programs on Ulnar nerve


Ulnar nerve en Espanol

Ulnar nerve en Francais


Ulnar nerve in the Marketplace

Patents on Ulnar nerve

Experimental / Informatics

List of terms related to Ulnar nerve

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

In human anatomy, the ulnar nerve is a nerve which runs from the shoulder to the hand, at one part running near the ulna bone. It is the only exposed nerve in the human body (it is unprotected for a few centimeters at the elbow). When someone says "hitting their funny bone" it is the aggravation of this nerve that is being referred to.


The ulnar nerve comes from the medial cord of the brachial plexus, and runs inferior on the medial/posterior aspect of the humerus down the arm, going behind the medial epicondyle at the elbow. Because of the mild pain and tingling throughout the forearm associated with an inadvertent impact of the nerve at this point, it is usually called the funny bone. (It may also have to do with its location relative to the humerus, as the name "humerus" is a homonym to the word "humorous").

It enters the anterior (front) side of the forearm and runs alongside the ulna. There it supplies one and a half muscles (flexor carpi ulnaris & medial half of flexor digiti profundus). It soon joins with the ulnar artery, and the two travel inferiorly together, deep to the flexor carpi ulnaris muscle.

After its journey down the ulna, the ulnar nerve enters the palm of the hand. Unlike the median nerve which travels below the flexor retinaculum of the hand and through the carpal tunnel, the ulnar nerve and artery pass superficial to the flexor retinaculum via the ulnar canal.

Branches and innervation


The ulnar nerve and its branches innervate the following muscles in the forearm and hand:

An Articular branch that passes to the elbow joint while the ulnar nerve is passing between the olecranon and medial epicondyle of the femur.


The ulnar nerve also provides sensory innervation to the part of the hand corresponding to the fourth and fifth digits:

Ulnar nerve entrapment

The Ulnar nerve can be trapped or pinched in various ways as it proceeds down the arm from the Brachial plexus to the ring and middle fingers. One common cause is cubital tunnel syndrome, where the tunnel runs the inner outside side of the elbow. Pinching of the nerve often causes tingling symptoms in the little and ring fingers. In some cases moderate to severe pain is experienced from pinching this nerve. Often such pins and needles sensations can be caused by sleeping wrongly on your arm, but sometimes the problems last for days. In severe cases, surgery is performed.

See also

Additional images

External links

Template:Brachial plexus

Template:WikiDoc Sources

de:Nervus ulnaris he:עצב הגומד nl:Telefoonbotje sv:Nervus ulnaris