Guyon's canal syndrome

Guyon's canal syndrome is characterized by distal compression of the ulnar nerve in the wrist region (Guyon's canal, lig. pisohamatum).
 * the common nerve trunk or only the deep motor branch or the sensitive ramus superficialis may be compressed (clinical symptoms)
 * he flexor carpi ulnaris and deep flexors of the fingers are never affected (unlike cubital tunnel syndrome)
 * important dg. the tool to localize the lesion is an EMG examination
 * surgical treatment consists in releasing the ulnar nerve