Anne has noticed that for the past three weeks she is unable to sleep for more than five hours at a time, even though she used to regularly get eight hours of sleep per night. She wakes early in the morning and just can't fall back to sleep once this happens. It appears that Anne has developed

A) somnambulism.
B) insomnia.
C) pseudoinsomnia.
D) sleep apnoea.

Insomnia

A sleep disorder characterized by difficulty falling asleep, staying asleep, or obtaining restorative sleep, leading to daytime impairment.

Pseudoinsomnia

A condition where individuals believe they have slept less than they actually have, often perceiving their sleep as insufficient or unrefreshing.

Sleep Apnoea

A condition disrupting normal sleep patterns due to interruptions in breathing or shallow breaths while asleep.