Forces generated at the thumb interphalangeal joint during imposed sinusoidal movements

Thumb Interphalangeal Joint Dislocation

DESCRIPTION A 23-year-old man presented to the emergency department with the after being struck in the hand with a basketball. Clinical findings are seen in the image above.

Irreducible dislocation of the interphalangeal joint of the thumb.

Two cases of posttraumatic irreducible compound dislocation of the interphalangeal joint of the thumb are presented. This rare injury requires surgical intervention with anatomic repositioning of the structures responsible for the irreducibility viz. the long Flexor tendon and the volar plate.

Modulation of coordinated muscle activity during imposed sinusoidal hip movements in human spinal cord injury.

Individuals with chronic spinal cord injury (SCI) often demonstrate multijoint reflex activity that is clinically classified as an extensor spasm. These responses are commonly observed in conjunction with an imposed extension movement of the hips, such as movement from a sit to a supine position. Coincidentally, afferent feedback from hip proprioceptors has also been implicated in the control o...

Variation in extension of the metacarpo-phalangeal and interphalangeal joint of the thumb.

Realization of Sinusoidal Forces at Cem

This paper describes the procedure implemented at CEM for dynamic force calibration using sinusoidal excitations of force transducers. The method is based on a sinusoidal excitation of force transducers equipped with an additional top mass excited with an electrodynamic shaker system. The acceleration is measured by means of a laser vibrometer.