In:
Knie Journal, Springer Science and Business Media LLC, Vol. 5, No. 1 ( 2023-03), p. 40-47
Kurzfassung:
After adequate surgical treatment of knee ligament injuries, the rehabilitative process represents a critical phase for later success. In addition to poor movement quality and the level of activity, neuromuscular deficits have been identified as critical factors for re-injury. Objectives The aim of this study was to use the results of an athlete after a severe knee injury to quantify compensation and progress during the course of rehabilitation using multichannel electromyography (EMG) measurements. Materials and methods The vastus medialis (VM) and lateralis (VL) muscles of a 24-year old professional soccer player (77 kg, 180 cm) were assessed using surface EMG 150, 178, and 226 days after surgical treatment of a multiligament injury. Since comparable analyses were not performed before the injury, both individual results and result profiles are compared with results from a reference group and the uninjured contralateral side. Results In addition to reduced isometric maximum voluntary strength (MVC) of the knee extensors (76%), reduced activity of the VM during low contraction intensities (20 and 40% MVC) was observed. Furthermore, the VM/VL activation ratio showed a dysregulated neural drive of both muscles on the operated side. Conclusions The reduced activity of the VM and the altered neural drive of the VM and VL may be due to an insufficient ability to activate motor units of the VM with lower recruitment thresholds.
Materialart:
Online-Ressource
ISSN:
2662-4028
,
2662-4036
DOI:
10.1007/s43205-022-00189-1
Sprache:
Deutsch
Verlag:
Springer Science and Business Media LLC
Publikationsdatum:
2023
ZDB Id:
3007238-4
