Decussation is the key to the infamous Brown Seqard...

Well this one always gives me a headache... spinal cord syndromes! No matter how hard I try I can't keep these in my head, however the video podcasts http://emergencymedicineireland.com/anatomy-and-em/ always make it easy to refresh my knowledge:

AFEM 06.1 - anterior cord syndrome
AFEM 06.2 - central cord syndrome
AFEM 06.3 - brown seqard

This is a pet topic made for exams as it includes anatomy and specific clinical findings matched to that anatomy, it can be linked to a variety of clinical cases/ images. It could also quite easily be tied into a question about c-spine clearance, management of suspected spinal injury or SCIWORA.

My summary of Brown Seqard is below (the colour scheme and concept are borrowed from AFEM):