On Fri, 02 March 2001, "Dunn Matthew Dr. ACCIDENT & EMERGENCY - SwarkHosp-TR" wrote:
>
> If the x-ray is for a fracture, then so the fracture line is horizontal
> (digits pointing hoizontal for suspected spiral fracture, LisFrancs etc;
> vertical for epiphyseal injuries). If it's looking for angulation, then with
> the proximal part of the bone due vertical. Horizontal lines are easier to
> see than vertical; angulation off vetical easier to see than off horizontal.
> Don't know why.
>
> Matt Dunn
It's to do with visual processing in V2 onwards - teleologically I guess because horizons are horizontal?
I spent months of my life reading and writing essays about this sort of neurophys stuff for my degree - but I've forgotten most of it I'm afraid!!
Giles.
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