Changes in soleus motoneuron pool excitability after artificial knee joint effusion

摘要: Abstract Hopkins JT, Ingersoll CD, Edwards JE, Cordova ML. Changes in soleus motoneuron pool excitability after artificial knee joint effusion. Arch Phys Med Rehabil 2000;81:1199-1203. Objective: To compare changes the magnitude of before and over a 4-hour period following Design: Before-after trial. Setting: All measurements were collected Sports Injury Research Laboratory, Indiana State University. Participants: Eleven healthy neurologically sound volunteers (mean age ± SD, 24 3yr; height, 173.2 9.6cm; weight, 72.9 8.7kg) with no history lower-extremity surgery lower extremity pathology last year. Interventions: An area superolateral to patella was cleaned injected subcutaneously 2mL lidocaine for anesthetic purposes. With second disposable syringe, 25mL sterile saline through capsule into space mimic mechanical Main Outcome Measure: Hoffmann's reflex (H-reflex) elicited by applying percutaneous stimulus tibial nerve popliteal fossa. Seven 12 stimuli delivered at 20-second intervals varying intensities find maximal H-reflex. The H-reflex measured five times same intensity rest intervals. This measurement recorded injection 1-hour 4 hours. Results: overall difference between groups found. Measurements from hours 3 significantly higher than preinjection ( p ≤.05). Conclusions: not inhibited as expected. facilitated beyond level, showing that quadriceps do respond way Because are normally during effusion, this facilitation could be result compensatory reaction response quadriceps. Further studies must performed determine extent duration relation inhibition © 2000 American Congress Rehabilitation Medicine Academy Physical