How does Raymond Carver use imagery in Where I'm Calling From?

Imagery:

We've only been in here a couple of days. We're not out of the woods yet. J.P. has these shakes, and every so often a nerve—maybe it isn't a nerve, but it's something—begins to jerk in my shoulder. Sometimes it's at the side of my neck. When this happens, my mouth dries up. It's an effort just to swallow then.