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Friday, March 27 • 08:00 - 17:00
[VIRTUAL] Case Study of an Anomalous Accessory Muscle of the Posterior Forearm

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We identified a supernumerary muscle of the extensor forearm compartment while dissecting a 90-year-old male cadaver. This muscle originated from a common origin site on the lower arm and inserted onto the thumb, just next to abductor pollicis longus. Previous reports noted similar supernumerary muscles, but none with this particular origin, insertion, or pathway. This muscle likely assisted with wrist and thumb abduction, but in being so superficial, may have posed an increased risk of developing pathological conditions. Alternatively, this muscle could be harvestable for reconstructive surgery, given its redundant function and possibility of being discovered during ultrasound.


Friday March 27, 2020 08:00 - 17:00 EDT