#middle_cerebral_vein__vena_cerebri_media  either of two cerebral veins
  supertype:  #cerebral_vein__vena_cerebri  any of several veins serving the cerebral hemispheres of the brain
  subtype:  #deep_middle_cerebral_vein  accompanies the middle cerebral artery deep in the Sylvian fissure; empties into the basal vein
  subtype:  #superficial_middle_cerebral_vein  a large vein along the line of the Sylvian fissure to the cavernous sinus

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