National Sleep Foundation

Chapter 8: Isolated Symptoms


Every health professional occasionally encounters sleep-related behaviors that may cross the line between normal and abnormal sleep.

This chapter describes some of these borderline conditions: long sleeping, short sleeping, snoring, sleep talking, and sleep starts. These are hard to fit into the other sleep classifications.Other, more consistently serious conditions are described elsewhere in this e-book.


  1. Thorpy MJ, “Classifications of Sleep Disorders,” In Kryger M, Roth T, Dement W (ed.), Principles and Practice of Sleep Medicine (5th Edition), St. Louis: Elsevier Saunders, page 687.