Anterior interosseous syndrome

As Kiloh - Nevin syndrome refers to the symptoms associated with a lesion of the anterior interosseous nerve. It is in this nerve is a purely motor branch of the median nerve, which innervates the flexors of the end members of the thumb, index and middle fingers, and the pronator quadratus. As a result, the person concerned may, among other things with the thumb and forefinger form no longer circle. An internal rotation weakness of the forearm ( Pronationsschwäche ) do not usually noticeable because the pronator teres is primarily responsible for this function. Although this muscle is also innervated by the median nerve, but it is not affected when Kiloh - Nevin syndrome, since its motor branch more proximally runs off the motor main trunk of the median nerve.

In addition to the characteristic clinical findings ( yet frequent misdiagnosis: tendon tear ), the diagnosis can be made by an electromyographic investigation. This can be found in the pronator quadratus signs of neurogenic damage, for example, while the abductor pollicis brevis ( from the median nerve innervated thenar muscle ) and the pronator teres have no injury mark. The reason can the Kiloh - Nevin syndrome a traumatic lesion underlying, but also an inflammatory injury, eg in the context of a Armplexusneuritis. The spontaneous prognosis is usually good, but can also be a surgical treatment may be required.

Source

• Mumenthaler M, Stöhr M, Müller- Vahl H. Compendium of lesions of the peripheral nervous system. Thieme 2003.