The quadriceps function in patellofemoral disorders
- 1 April 1987
- journal article
- research article
- Published by Springer Nature in Archives of orthopaedic and trauma surgery
- Vol. 106 (3) , 195-198
- https://doi.org/10.1007/bf00452210
Abstract
The influence of quadriceps contraction on patellar alignment was investigated in tangential views of 31 patients with patellofemoral complaints and compared with 25 controls. The congruence angle decreased significantly following quadriceps contraction in patients with patellar subluxation in contrast to those with chondromalacia and normals. Electromyography (EMG) of the vastus lateralis (VL) and vastus medialis obliquus (VMO) during maximal quadriceps contraction was obtained prior to and after 3 months of isometric quadriceps exercises in 15 knees with patellar subluxation and in 11 with idiopathic chondromalacia of the patella. The EMG after 3 months revealed an increase in the activity of both VL and VMO only in patients with patellar subluxation, but the muscular balance of the patella remained unchanged. Only seven patients were improved after 3 months. A more selective training of the VMO is proposed. Der Einfluß der Quadricepsmuskelkontraktion auf die Führung der Patella wurde bei 31 Patienten mit Beschwerden im Femoropatellargelenk (Subluxation der Patella, idiopathische Chondromalacia patellae) untersucht. Als Kontrolle dienten 25 beschwerdefreie Personen. Röntgenologisch zeigte sich bei Patienten mit Subluxation der Patella der Patellakongruenzwinkel im Vergleich zu Normalpersonen und Patienten mit Chondromalacia patellae abgeflacht. Der Unterschied war statistisch signifikant. Die elektromyographische Aktivität des M. vastus lateralis and des M. vastus medialis obliquue stieg nach 3monatigem intensiven Muskeltraining le diglich bei Patienten mit Subluxation der Patella an, wobei jedoch die muskuläre Balance unverändert blieb. Das Beschwerdebild war jedoch nur bei 7 Patienten gebessert. Es wird daher ein selektives Training des M. vastus medialis obliquus empfohlen.Keywords
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