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Genetic factors are believed to account for 30–50% of the risk for cocaine and heroin addiction. Dynorphin peptides, derived from the prodynorphin (PDYN) precursor, bind to opioid receptors, preferentially the kappa‐opioid receptor, and may mediate the aversive effects of drugs of abuse. Dynorphin peptides produce place aversion in animals and produce dysphoria in humans. Cocaine and heroin have both...
Parsonage–Turner syndrome is the term used to describe a neuritis involving the brachial plexus. It may present with symptoms of an isolated peripheral nerve lesion, although the pathology is thought to lie more proximally. A case describing an isolated anterior interosseus nerve palsy due to an acute brachial neuritis is presented where the electromyographic findings confirmed the diagnosis, but...
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