► Excessive daytime sleepiness leading to prolonged naps that are not refreshing.
► Nocturnal sleep of long duration (as much as 12 hr or more)
► Sleep drunkenness
► Difficulty in awakening the patients from sleep
► Episodes of automatic behavior may also be present.
a. Idiopathic Hypersomnia (Primary Hypersomnia)
► Idiopathic hypersomnia is characterized by long periods involving episodes of excessive daytime sleepiness. Most of the time the symptoms are present.
► Some people with this disorder experience automatic behavior such as:
- Cold hands and feet
- Depression symptoms
b. Post - traumatic Hypersomnia:
► Post - traumatic hypersomnia may mimic idiopathic hypersomnia.