thefuror:

I don’t think we should ever have to justify mental illness through neurological means - the very implication that we ought to reeks of ableism and that “just get over it” mentality that so many people embrace, but here is a recent (2009) study about the neurology behind BIID.

The abstract:

The question of how the human brain combines disparate sensory inputs to construct a unified body image is of longstanding interest^1,2,3 . We approached this subject by studying the unusual medical condition of apotemnophilia, in which otherwise mentally normal individuals express the strong and persistent desire for the amputation of a specific healthy limb^4,5,6 . Here we show using functional brain imaging – magnetoencephalography (MEG) – that the condition is characterised by an absence of activity in the right superior parietal lobule (SPL) when the affected limb is touched. When this discovery is combined with our earlier finding of a simultaneous increase in skin conductance response (SCR) on touching the affected limb⁷ , which reflects increased sympathetic nervous system activity relating to the limb⁸ , we conclude that what has been regarded as a purely psychological condition, actually has a neurological basis and is caused by a failure to represent one or more limbs in the right SPL. This has the bizarre consequence that although sufferers can feel the affected limb being touched, it does not actually integrate into their body image – a mismatch that results in a desire for the affected limb to be amputated.

It seems overwhelmingly clear that BIID is a genuine neurological affliction: that makes all the hatred directed at the transabled community downright shameful. 

(via thefuror1-deactivated20120224)