Commentary Inf I 90

le vene e i polsi. Padoan (DDP Padoan.Inf.I.90) cites Dante's previous reference to the pulses (V.N.II.4), those places where agitation of the blood is evident at the body's surface, and Boccaccio's gloss to this verse (DDP Boccaccio.Inf.I.90), which states that the veins and pulses tremble when blood rushes from them, a phenomenon occurring when the heart is troubled, according to Boccaccio, by fear.