The ligament of Struthers is a fibrous band extending from the tip of the process to the medial epicondyle. The median nerve and brachial artery pass under the ligament of Struthers and consequently can be compressed, causing supracondylar process syndrome.
How common is ligament of Struthers?
It is important to distinguish the arcade of Struthers from the ligament of Struthers, which is found in 1% of the population and extends from a supracondylar bony or cartilaginous spur to the medial epicondyle.
What forms the cubital tunnel?
The cubital tunnel is formed by the bony walls of the olecranon and the medial epicondyle of the humerus. The roof is formed by the overlying fascial bands of flexor carpi ulnaris and the medial ligament of the elbow. The ulnar nerve is vulnerable as it enters, traverses and exits the tunnel.
Where is the arcade of Struthers?
According to the standard anatomic definition, the arcade of Struthers is a thin fibrous band that usually extends from the medial head of the triceps to the medial intermuscular septum. It is often said to be about 6-10 cm proximal to the medial epicondyle.What is an avian spur?
The supracondylar process of the humerus (also known as an avian spur) is a variant bony projection on the anteromedial aspect of the upper arm bone (humerus), about 5–6 cm above the medial epicondyle. It is directed downward, forward and medially pointing to the medial epicondyle.
What is the leash of Henry?
Purpose: Radial nerve compression caused by crossing branches of the recurrent radial artery – so called hypertrophic “leash(es) of Henry” (LoH) – is rare. Nevertheless it is important to diagnose the type of compression neuropathy in the forearm.
Does everyone have a ligament of Struthers?
Prevalence. The ligament is not always present, and there is some debate as to its prevalence. Struthers originally estimated that it was present in 1% of humans.
What is the intermuscular septum?
1. A connective tissue septum that separates two muscles, esp. one from which muscles may take their origin.What is the arcade of Frohse?
The arcade of Frohse (pronounced “\ˈfʁoːzə \”) is also known as the supinator arch. The arcade is formed by a fibrous band between the two heads of the supinator muscle. The deep branch of the radial nerve passes beneath the arcade accompanied by vessels known as the leash of Henry.
What is Guyon's canal?Guyon’s canal also called ulnar tunnel or ulnar canal, is an anatomical fibro-osseous canal located on the medial side of the hand. … The ulnar nerve and ulnar artery pass through the Guyon canal as they pass from distal forearm to the hand.
Article first time published onIs carpal tunnel and cubital tunnel the same?
A distinction, though, is in where you feel the pain. While carpal tunnel syndrome affects the thumb, index, and long fingers, cubital tunnel syndrome affects the small and ring fingers.
What is inside the cubital tunnel?
The cubital tunnel is a narrow passageway on the inside of the elbow formed by bone, muscle, and ligaments with the ulnar nerve passing through its center. The roof of the cubital tunnel is covered with a soft tissue called fascia. When the elbow is bent, the ulnar nerve can stretch and catch on the bony bump.
Is cubital tunnel syndrome the same as tennis elbow?
It’s a popular moniker of cubital tunnel syndrome—neuritis, or inflammation of the ulnar nerve. Is it related to tennis elbow? It’s completely unrelated. [Tennis elbow is tendonitis, and is caused by inflammation of the tendons.]
What is the humerus bone?
The humerus — also known as the upper arm bone — is a long bone that runs from the shoulder and scapula (shoulder blade) to the elbow. Fractures of the humerus are classified in one of two ways: proximal humerus fracture or humerus shaft fracture.
What is the epicondyle area?
There are bony bumps at the bottom of the humerus called epicondyles, where several muscles of the forearm begin their course. The bony bump on the outside (lateral side) of the elbow is called the lateral epicondyle. The ECRB muscle and tendon is usually involved in tennis elbow.
Where is the medial epicondyle?
The medial epicondyle is a secondary growth centre at the elbow, which first appears around age 6 and fuses to the shaft of the humerus at about age 14-17 years. A medial epicondyle fracture is an avulsion injury of the attachment of the common flexors of the forearm.
How many bones does the humerus articulate with?
HumerusTA98A02.4.04.001TA21180FMA13303Anatomical terms of bone
Which forearm nerve is the cause of humerus supracondylar process syndrome?
The median nerve and brachial artery pass under the ligament of Struthers and consequently can be compressed, causing supracondylar process syndrome.
What is Martin Gruber syndrome?
It is an anomalous pattern of innervation occurring between the median and ulnar nerves in the forearm. In a Martin-Gruber anastomosis, a crossover of axons from the anterior interosseous nerve (the exclusively motor branch of the median nerve) to the ulnar nerve in the forearm usually occurs.
What is the supinator muscle?
The supinator is a broadly-shaped muscle in the superior and posterior compartment of the forearm, It curves around the upper third of the radius and consists of two layers of fibres. In between these layers lies the deep branch of the radial nerve.
What is high and low radial nerve palsy?
A high radial nerve palsy involves the radial nerve proper, whereas the low palsy involves the posterior interosseous nerve (PIN) (both of these are near the level of the elbow). The importance in the difference in high and low radial nerve palsies is in the presence or absence of active wrist extension.
What causes pin syndrome?
Posterior interosseous nerve syndrome can be caused by a traumatic injury, tumors, inflammation and an anatomic injury. With repeated pronation and supination a dynamic compression of the nerve in the proximal part of the forearm can be created.
What is pin palsy?
Posterior interosseous nerve palsy causes neurogenic weakness in muscles innervated by this nerve. Patients who have PIN lesions usually present with partial or complete weakness of finger and thumb extension at the metacarpophalangeal joint and weakness of thumb abduction.
What is Saturday night palsy?
THE TERM Saturday night palsy has become synonymous with radial nerve compression in the arm resulting from direct pressure against a firm object. It typically follows deep sleep on the arm, often after alcohol intoxication.
What is arcade of Frohse nerve entrapment?
The arcade of Frohse is a site of radial nerve entrapment, and is believed to play a role in causing progressive paralysis of the posterior interosseous nerve, both with and without injury. The arcade of Frohse was named after German anatomist, Fritz Frohse (1871-1916).
What is the difference between INTRAmuscular and intermuscular?
What’s the difference and why does it matter? INTRAmuscular coordination is the coordination of the individual fibers in your muscles. … INTERmuscular, on the other hand, means that a group of muscles are performing the action (more than one muscle).
What is crural fascia?
The crural fascia or deep fascia of the lower leg is a thick connective tissue fascia that investing the muscles of the lower leg and dividing them into the four compartments of the lower leg 1,2: anterior compartment.
Where is the intermuscular septum?
The medial intermuscular septum, thicker than the preceding, extends from the lower part of the crest of the lesser tubercle of the humerus below the Teres major, along the medial supracondylar ridge to the medial epicondyle; it is blended with the tendon of the Coracobrachialis, and affords attachment to the Triceps …
What is volar carpal ligament?
The palmar carpal ligament (also volar carpal ligament or Guyon’s Tunnel) is the thickened portion of antebrachial fascia on the anterior of the wrist. It is officially unnamed. … The palmar carpal ligament is continuous with the extensor retinaculum of the hand, which is located on the posterior side of the wrist.
What is ulnar paradox?
Ulnar paradox If the ulnar nerve lesion occurs more proximally (closer to the elbow), the flexor digitorum profundus muscle may also be denervated. … This is called the “ulnar paradox” because one would normally expect a more proximal and thus debilitating injury to result in a more deformed appearance.
What is a finger canal?
The canal is formed by two bones, the pisform and hamate and the ligament that connects them. After passing through the canal, the ulnar nerve branches out to supply feeling to the little finger and half the ring finger. Branches of this nerve also supply the small muscles of the hand.
