Dynamic F waves in neurogenic claudication.
Serial F waves were elicited before and after ambulation in 2 patients with neurogenic claudication. In both patients dynamic changes in F wave parameters consisting of either unelicitability or increased latencies occurred postexercise. The time course of these changes and their subsequent rapid reversibility over 15 minutes suggest ischemic-induced conduction block and slowing in proximal motor axons. These physiological changes may account for some of the dynamic neurological symptoms of this disorder. Moreover, F wave exercise testing may provide corroborative information for the diagnosis of neurogenic claudication.
London
S F
SF
Department of Neurology, University of Colorado Health Sciences Center, Denver 80262.
England
J D
JD
D001775:Blood Circulation; D004576:Electromyography; D015444:Exercise; D006801:Humans; D007383:Intermittent Claudication / Q000209:etiology / Q000503:physiopathology*; D009431:Neural Conduction; D010146:Pain / Q000209:etiology / Q000503:physiopathology; D011930:Reaction Time; D013130:Spinal Stenosis / Q000150:complications / Q000503:physiopathology; D014680:Veins / Q000503:physiopathology