Although the number of sleep disorders is many, they all tend to share varying degrees of up to three very recognizable symptoms:
- Excessive daytime sleepiness is the most common reason why patients come to seek help from a sleep medicine specialist. Excessive sleepiness is generally most noticeable when a sleepy individual sits still or becomes inactive such as reading or watching TV. Excessive sleepiness can become particularly dangerous when driving a motor vehicle, placing the individual and other drivers at risk from a motor vehicle accident from falling asleep at the wheel. A well-rested individual should be able to sit through these and other boring situations without nodding off. If you nod off when inactive, it is a strong indication that you may have a pathological sleepiness.
- Difficulty initiating or maintaining sleep, or non-refreshing sleep, are symptoms commonly associated with insomnia. Although there are several specific disorders of insomnia, insomnia can be a symptom of many other sleep disorders such as obstructive sleep apnea, restless legs syndrome or other medical conditions such as depression or anxiety. It is helpful to regard insomnia as a symptom like a “fever”. Just as many things may cause a fever, many disorders may cause insomnia. To the extent possible, we try to identify and treat all of the underlying causes of a patient’s insomnia. If you have difficulty initiating or maintaining sleep, or non-refreshing sleep, you may have a sleep disorder and should consider an evaluation from a sleep medicine specialist.
- Parasomnias are unwanted or undesirable behaviors or experiences that occur during sleep, such as sleep walking, sleep terrors, nightmares, sleep eating behavior, or enuresis (bedwetting). Some parasomnias occur more specifically during deep slow wave sleep such as sleep terrors, and, therefore, are most common during the first half of the night. Other parasomnias may present during rapid eye movement (REM) sleep, also known as dream sleep. Since REM sleep is most prominent in the early morning, REM sleep parasomnias such as nightmares or REM sleep behavior disorder are more likely to manifest during the second half of the night. Parasomnias are generally easily treatable once the underlying diagnosis has been established.