Medicine and Health Sciences Commons^™

Central Somatosensory Changes And Altered Muscle Synergies In Subjects With Anterior Cruciate Ligament Deficiency, Carol Courtney, Rose Marie Rine, Penny G. Kroll

Penny G. Kroll

To clarify the mechanisms of compensation in subjects with anterior cruciate ligament deficiency (ACL-D), we examined proprioception, quadriceps strength, somatosensory evoked potentials (SEPs) and muscle responses during gait in varied combinations of speed and incline. Seventeen subjects with ACL-D were grouped by functional level and report of giving way. Seven subjects without ACL-D served as a control sample for muscle response measures. ACL-D subjects with quadriceps weakness experienced giving way and could not resume sport activities. Those without weakness fell into one of two groups: (1) copers, who had full return to previous activity and no giving way despite proprioceptive …

Two Different Fatigue Protocols And Lower Extremity Motion Patterns During A Stop-Jump Task, David Quammen, Nelson Cortes, Bonnie L. Van Lunen, Shawn Lucci, Stacie I. Ringleb, James Onate

Rehabilitation Sciences Faculty Publications

Context: Altered neuromuscular control strategies during fatigue probably contribute to the increased incidence of non-contact anterior cruciate ligament injuries in female athletes.

Objective: To determine biomechanical differences between 2 fatigue protocols (slow linear oxidative fatigue protocol [SLO-FP] and functional agility short-term fatigue protocol [FAST-FP]) when performing a running-stop-jump task.

Design: Controlled laboratory study.

Setting: Laboratory.

Patients or Other Participants: A convenience sample of 15 female soccer players (age = 19.2 ± 0.8 years, height = 1.67± 0.05m, mass = 61.7 + 8.1 kg) without injury participated.

Intervention(s): Five successful trials of a running–stop-jump task were obtained prefatigue and postfatigue during …