Has anyone here come across the condition - alexithymia?

I have read numeorus articles,ranging from psychiatry to philosophy to psychoanalysis, and still there is no conclusive etiology
That makes me more confused. Right now, the website that I rely on which offers clear explanation has got to be alexithymia.supanet.com

I'm taking biopsychology, and wishes to know if anyone has any take on the neurobiology roots of this condition.