How does Stephen King use imagery in Misery?

Imagery:

"She picked up his foot. Its toes were still spasming. She carried it across the room. By the time she got to the door they had stopped moving."

"He dozed off these days as an old man dozes off, abruptly and sometimes at inappropriate times, and he slept as old men sleep - which is to say, only separated from the waking world by the thinnest of skins."