The Greek word is the adjective CANASTERO asthenes meaning weak, sickly, powerless, poor and the verb astheneo: weak, falling ill. Of these Greek words derive weakness: weakness or psychosomatic looseness as spring asthenia and astenico, who suffers from weakness or that has type leptosomatico ( 41 skinny body; opposite to picnico ( 41 fat body; in the typology of the German medical neurologist Kretschmer, died in 1964, which drew up a typology of human personality by comparing the mentally ill to normal people.
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