What are the median and ulnar nerves?
The median and ulnar nerves innervate the flexors of the carpus and digits, with the median nerve innervating the muscles on the medial aspect of the forearm, and the ulnar nerve innervating those on the caudal aspect.
What type of median ulnar nerve interconnection carries only sensory fibers?
Berrettini anastomosis (BA)
Berrettini anastomosis (BA). BA is described as a neural connection between common digital nerves of the ulnar and median nerves. It is purely sensory and is most often bilateral, arising proximal to the distal edge of the transverse carpal ligament and following an oblique course.
Where is the ulnar nerve?
The ulnar nerve runs behind the medial epicondyle on the inside of the elbow. Beyond the elbow, the ulnar nerve travels under muscles on the inside of your forearm and into your hand on the side of the palm with the little finger.
What nerve Innervates the pinky and ring finger?
As a sensory nerve, the ulnar nerve gives feeling to the: Pinky finger. Side of the ring finger closest to the pinky finger. Palm and back of the hand on the pinky side.
What is Guyon’s canal?
Guyon canal serves as a protection for the ulnar nerve and ulnar artery as they traverse from the distal wrist into the hand. It is formed by the following structures: The volar portion/roof of the canal is created by the volar carpal ligament (also known as the palmar carpal ligament).
What is the median nerve?
The median nerve provides motor (movement) functions to the forearm, wrist and hand. It also sends touch, pain and temperature sensations from the lower arm and hand to the brain. A pinched median nerve can cause carpal tunnel syndrome.
What part of the hand does the ulnar nerve control?
The ulnar nerve transmits electrical signals to muscles in the forearm and hand. The ulnar nerve is also responsible for sensation in the fourth and fifth fingers (ring and little fingers) of the hand, part of the palm and the underside of the forearm.
Where is the ulnar nerve most likely to be damaged?
The most common site of ulnar nerve injury is near the elbow. Nerve pathology can be caused by anatomic damage from fracture of the medial epicondyle, osteophyte infection, soft tissue mass, or synovitis at the elbow joint.
Is there a difference between Martin-Gruber anastomosis and Marinacci communication?
Objective: Prevalence of Martin-Gruber anastomosis, an anomalous median-to-ulnar forearm communication, is well reported in literature while Marinacci communication, the reverse of Martin-Gruber with a forearm ulnar-to-median communication is under-recognized.
What is the prevalence of Martin-Gruber anastomosis?
The incidence of Martin-Gruber anastomosis ranges from 5% to 34%, which is characterized by crossing over from the median to the ulnar nerve and innervating the first dorsal interosseous, thenar or hypothenar muscles. However, the reverse Martin-Gruber anastomosis, or Marinacci anastomosis, is far less discussed and appears in recent literature.
What is ulnar-to-median anastomosis?
Golovchinsky V. Ulnar-to-median anastomosis and its role in the diagnosis of lesions of the median nerve at the elbow and the wrist. Electromyogr Clin Neurophysiol 1990;30:31–4.