Effect of facilitation on side-to-side H reflex amplitude ratio.
Although voluntary facilitation is sometimes necessary to evoke the H reflex, relevant data is lacking on side-to-side amplitude ratios in facilitated condition. To determine the normal limits of H reflex amplitude ratio in facilitation and to assess it's clinical applicability, we performed FCR H reflex study in fifty asymptomatic subjects. The lower limit of the amplitude ratio that encompasses 97.5% of subjects in facilitation was 0.48. These data suggest H reflex amplitude ratio measured in facilitation without averaging is useful for the diagnosis of unilateral radiculopathy.
Department of Rehabilitation Medicine, Seoul National University College of Medicine, Korea. rehabdoc@plaza.snu.ac.kr
N J
NJ
Paik
T R
TR
Han
M S
MS
Im
D000293:Adolescent; D000328:Adult; D000368:Aged; D004558:Electric Stimulation; D004576:Electromyography; D005071:Evoked Potentials / Q000502:physiology; D005260:Female; D006181:H-Reflex / Q000502:physiology*; D006801:Humans; D008297:Male; D008475:Median Nerve / Q000502:physiology; D008875:Middle Aged; D009119:Muscle Contraction / Q000502:physiology; D018482:Muscle, Skeletal / Q000502:physiology*; D011843:Radiculopathy / Q000503:physiopathology; D012016:Reference Values