Another study finding indicates that the brains of the two study volunteers had organized specific resources to control the sixth fingers. Andrea Serino and Michael Akselrod, Ph. Our bodies can work in mysterious ways, which sometimes give rise to strange medical conditions. In this Spotlight we look at five of these rare….
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Sclerodactyly is a condition in which the skin thickens in the finger, causing the hands to curl inward and take on a claw shape. It is an autoimmune…. Pistohl, R. Salomon, A. Cheah, O. Blanke, A. Serino, E. Augmented manipulation ability in humans with six-fingered hands. Nature Communications , ; 10 1 DOI: ScienceDaily, 3 June University of Freiburg. Six fingers per hand. Retrieved November 13, from www.
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Does its movement accompany the movement of common fingers, like in the little and ring fingers, or does it move independently from other fingers like the thumb? They also wanted to know if operating an additional, or supernumerary, finger on each hand made the brain work harder, to the detriment of cognitive function as a whole. So, they devised a series of tasks to put the subjects' dexterity to the test.
This included custom video games that used a standard computer keyboard, and object manipulation tasks, such as tying shoelaces, flipping book pages and folding napkins.
The researchers found that the polydactyl subjects were more dexterous than the five-fingered controls, able to move their supernumerary fingers independently of the others, with a thumb-like range of motion.
Scans revealed that these extra digits had three phalanges, like a finger does while the thumb only has two , along with their own muscles, tendons and nerves.
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