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The theory is that the radial nerve becomes irritated and/or inflamed from friction caused by compression by muscles in the forearm. [1]Some speculate that radial tunnel syndrome is a type of repetitive strain injury (RSI), but there is no detectable pathophysiology and even the existence of this disorder is questioned.
The neurogenic type is the most common and presents with pain, weakness, paraesthesia, and occasionally loss of muscle at the base of the thumb. [1] [2] The venous type results in swelling, pain, and possibly a bluish coloration of the arm. [2] The arterial type results in pain, coldness, and pallor of the arm. [2]
Anterior interosseous syndrome is a medical condition in which damage to the anterior interosseous nerve (AIN), a distal motor and sensory branch of the median nerve, classically with severe weakness of the pincer movement of the thumb and index finger, and can cause transient pain in the wrist (the terminal, sensory branch of the AIN innervates the bones of the carpal tunnel).
They are known as the "5 Ps": pain, pallor, decreased pulse, paresthesia, and paralysis. [6] Pain and paresthesia are the early symptoms of compartment syndrome. [19] [6] Common symptoms are: Pain: A person may feel pain greater than the exam findings. [6] This pain may not be relieved by strong painkillers, including opioids like morphine. [20]
Injuries to the arm, forearm or wrist area can lead to various nerve disorders. One such disorder is median nerve palsy. The median nerve controls the majority of the muscles in the forearm. It controls abduction of the thumb, flexion of hand at wrist, flexion of digital phalanx of the fingers, is the sensory nerve for the first three fingers, etc.
Corticosteroid, Pain medication [2] Radial neuropathy is a type of mononeuropathy which results from acute trauma to the radial nerve that extends the length of the arm. [ 3 ] It is known as transient paresthesia when sensation is temporarily abnormal.
The range of motion at the shoulder may be limited by pain. A painful arc of movement may be present during forward elevation of the arm from 60° to 120°. [4] Passive movement at the shoulder will appear painful when a downward force is applied at the acromion but the pain will ease once the force is removed. [2]
Writer's cramp or focal hand dystonia (FHD) is an idiopathic movement disorder of adult onset, characterized by abnormal posturing and movement of the hand and/or forearm during tasks requiring skilled hand use, such as writing.