The Effect of Biceps Reattachment Site on Moment Arm

The effect of biceps reattachment site.

BACKGROUND We hypothesize that an anatomic repair of the distal biceps tendon would recreate native tendon moment arm and forearm rotation, while a nonanatomic insertion would compromise moment arm and forearm rotation. METHODS Isometric supination torque was measured at 60° of pronation, neutral, and 60° of supination for the native distal biceps tendon and 4 repair points in 6 cadaveric spe...

EFFECT OF BICEPS REATTACHMENT LOCATION ON MOMENT ARM by

Association between contraction-induced increases in elbow flexor muscle thickness and distal biceps brachii tendon moment arm depends on the muscle thickness measurement site.

The purpose of this study was to investigate how the contraction-induced increase in distal biceps brachii tendon moment arm is related to that in elbow flexor muscle thickness, with a specific emphasis on the influence of the site-related differences in muscle thickness. The moment arm and muscle thickness were determined from sagittal and cross-sectional images, respectively, of the right arm...

The Effect of Biceps Reattachment Site on Moment Arm

Introduction: Avulsion of the distal biceps tendon from the tuberosity occurs mostly in middle-aged males resulting from eccentric loading of the flexed, supinated forearm . When non-operative treatment is chosen, supination strength decreases by 50% and flexion strength is reduced by 35-40% . Surgical repair has been shown to be a better alternative than non-operative treatments for restoratio...

Variation of muscle moment arms with elbow and forearm position.

We hypothesized that the moment arms of muscles crossing the elbow vary substantially with forearm and elbow position and that these variations could be represented using a three-dimensional computer model. Flexion/extension and pronation/supination moment arms of the brachioradialis, biceps, brachialis, pronator teres, and triceps were calculated from measurements of tendon displacement and jo...