Ray often wakes up at night talking loudly and incoherently. During this time, his heart rate increases, and he recalls vague images of someone pressing on his chest. However, he is never fully awake and returns to sleep. In the context of sleep disorders, Ray is exhibiting symptoms of _____.

A) sleep terrors
B) nightmares
C) insomnia
D) somnambulism

Somnambulism

Also known as sleepwalking, a disorder occurring during deep sleep causing individuals to walk or perform other complex behaviors while asleep.

Sleep Terrors

Episodes of screaming, intense fear and flailing while still asleep, primarily in children, distinct from nightmares due to their occurrence in non-REM sleep.

Insomnia

A sleep disorder characterized by difficulty falling asleep, staying asleep, or experiencing restful sleep.