Syndroma canalis Guyoni

Guyon's canal syndrome is characterized by distal compression of the ulnar nerve in the wrist region (Guyon's canal, lig. pisohamatum).


 * Compression may be of the common nerve trunk or only the deep motor branch or the sensory ramus superficialis (clinical signs),
 * m. flexor carpi ulnaris and deep finger flexors are never affected (unlike cubital canal syndrome),
 * EMG examination is an important dg. tool to localize the lesion,
 * surgical treatment consists in releasing the nervus ulnaris.