Are there any shifts in 'The Raven' by Edgar Allan Poe?

The speaker is definitely the melodramatic type. He starts out at an emotional level of about nine on a ten-point scale; he then heads right through the roof to about fifteen. His tone is intense, almost frantic. He seems super-focused one moment, and then a bit spaced-out the next, he's had a tough night, but from the sound of his voice and the choice of his Words, readers get the sense that he's wound pretty tight even when he's not talking to birds.