• If the SCN is confused about what time it is because of ,the blue light emitted by your mobile phone screen it will restrict the
production of melatonin
Anxiety
• Anxiety causes adrenaline levels to rise in the body as
part of the “fight or flight” response. • This can interfere with the sleep cycle and cause the
body temperature and heart rate to increase, making it
harder to fall asleep
Alcohol:
• Alcohol has sedative effects that can induce feelings of sleepiness, but has been linked to poor
sleep quality and duration
Caffeine
Blocks adenosine receptors on neurons, making the body less responsive to the build-up of
adenosine, reducing feelings of tiredness.
• Too much caffeine leads to a build up of adenosine leading to
feelings of grogginess the next day