👉 Somnolence, also known as sleep apnea, refers to a condition where the body does not get enough quality of sleep. When you sleep, your brain sends signals to your body that tell it when it's time to rest. However, if the brain is not getting enough sleep, this signal can be disrupted and wake you up during the night. This can lead to feeling tired or groggy in the morning, as well as other symptoms like difficulty concentrating or nightmares. Somn