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  • Title: Electrically elicited co-contraction of thigh musculature after anterior cruciate ligament surgery. A description and single-case experiment.
    Author: Delitto A, McKowen JM, McCarthy JA, Shively RA, Rose SJ.
    Journal: Phys Ther; 1988 Jan; 68(1):45-50. PubMed ID: 3257299.
    Abstract:
    The purpose of this article is to describe a method for strengthening the quadriceps femoris muscle in a patient after anterior cruciate ligament (ACL) surgery. The method incorporates electrically elicited co-contraction of the quadriceps femoris and hamstring muscles. A single-case experimental design based on a split-middle (ABAB) technique was used to assess the effects of the systematic administration and withdrawal of electrical stimulation with respect to changes in knee isometric extension and flexion torque and circumferential measurements of the thigh in a patient six weeks after ACL reconstruction. Results show increases in extension and flexion torque and thigh circumferential measurements that are associated with both stimulation (treatment) phases in addition to a maintenance effect demonstrated during the withdrawal phase. In this patient, the technique appears to be effective in increasing muscle strength and circumferential measurements, particularly quadriceps femoris muscle torque. Implications and suggestions for future research are included.
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