Cubital tunnel syndrome / ulnar nerve entrapment
The cubital tunnel syndrome, also called ulnar nerve entrapment, is caused by a compression of the ulnar nerve in the cubital tunnel, a canal proceeding through the elbow.
In case of the cubital syndrome, there is an excessive narrowing under the ulnar ligament of the ulnar nerve in the elbow and/or under the flexor carpi ulnaris muscles. Within this area, the ulnar nerve is located at the medial edge of the elbow between skin and bone, without any significant cushion by soft tissue. Even slightly bumping into this area can cause paresthesia. Due to its exposed location, the nerve is prone to injury and damage.