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Changes in soleus motoneuron pool excitability after artificial knee joint effusion
HOPKINS JT; INGERSOLL C; EDWARDS JE
ARCH PHYS MED REHABIL , 2000, vol. 81, n° 9, p. 1199-1203 Doc n°: 97090 Localisation : Documentation IRR Descripteurs : DE52 - EXPLORATION EXAMENS BILANS - GENOU
Article consultable sur : http://www.archives-pmr.org
Objective: To compare changes in the magnitude of soleus motoneuron excitability before and over a 4-hour period following artificial knee effusion. Design: Before-after trial. Setting: All measurements were collected in the Sports Injury Research Laboratory, Indiana State University. Participants: Eleven healthy and neurologically sound volunteers (mean age ± SD, 24 ± 3yr; height, 173.2 ± 9.6cm; weight, 72.9 ± 8.7kg) with no history of lower-extremity surgery and no lower extremity pathology in the last year. Interventions: An area superolateral to the patella was cleaned and injected subcutaneously with 2mL of lidocaine for anesthetic purposes. With a second disposable syringe, 25mL of sterile saline was injected through the superolateral knee joint capsule into the joint space to mimic mechanical joint effusion. Main Outcome Measure: Hoffmann's reflex (H-reflex) was elicited by applying a percutaneous stimulus to the tibial nerve in the popliteal fossa. Seven to 12 stimuli were delivered at 20-second intervals with varying intensities to find the maximal H-reflex. The maximal H-reflex was measured five times at the same stimulus intensity with 20-second rest intervals. This measurement was recorded before injection and at 1-hour intervals following the injection for 4 hours. Results: An overall difference between groups was found. Measurements from hours 3 and 4 were significantly higher than the preinjection measurements (p Langue : ANGLAIS Identifiant basis : 2000213015 |
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