Mutations in these genes contribute to hearing loss by interfering with critical steps in processing sound. Different mutations in the same gene can be associated with different types of hearing loss, and some genes are associated with both syndromic and nonsyndromic forms.
This kind of therapy is distinct from what is commonly known as sleep hygiene: exercising regularly, but not too close to bedtime, and avoiding coffee and too much alcohol in the evening. These healthful habits do not amount to an effective treatment for insomnia. In her 2008 pilot study testing CBT-I in people with depression, Dr. Manber of Stanford used sleep hygiene as part of her control treatment.
A number of tests can be carried out to assess your sleep and help identify any underlying cause. These are usually carried out at a specialist sleep centre. Two of the main tests used are: Polysomnography (a night time sleep test), which will help rule out sleep disorders such as narcolepsy or sleep apnoea.