He continues, such a failure of empathy, such numbness to the pain of a child or the desperation of a parent is not innate.

CENTERFORSECURITYPOLICY: Monica Crowley, Mightier Pen 2012

Migraine with aura is a severe headache preceded by symptoms such as seeing flashing lights, temporary visual loss, speech problems or numbness of the face.

BBC: Epilepsy and migraine 'could have shared genetic link'