My first impression of this is the interesting effect you've gone for with the almost pencil-like finish. As mentioned in one of the comments you received, it does in a way remind you of a Geiger drawing. The subject you have gone for is unique to say the least.
I think where this photo suffered the most was in the voters perceptions of the blown highlights. In a way it blends with the pencil effect so therefore in my opinion it doesn't distract too much from the overall image.
You've kept most of the important detail in the arm and hand which is most important and both the foreground of the cables and the background of the hand sit nicely in focus.
Overall this is a really good effort and very unique. Well done on your placing and best of luck in future challenges.
Ok, this shot makes me go ewwwwww (not sure why)doesn't mean the photo isn't good...... I like the way you turned it almost into a pencil drawing.... the tubes going into the arm makes a nice contrast.