‘When you can’t get to sleep at night, you might explain it to someone as your brain not being able to shut off.
While your brain never truly shuts off, when you do fall asleep, your brain sends inhibitory neurons that help reduce conscious awareness to get to a point of deep sleep. Normal sleepers often feel like they’ve fallen asleep before their brain is in a scientifically-defined state of sleep, but people with insomnia aren’t so lucky.
A recent study by BYU psychology professor Daniel Kay published in Sleep suggests a dysfunction in the inhibition process could be what causes those with insomnia to have a hard time fully falling asleep.
“Previous studies found that patients with insomnia appear to be asleep, their eyes are closed and their brain is in a characteristic sleep pattern, but you wake them up and guess what they are more likely to tell you? ‘I was awake,’” Kay said.
This problem has traditionally been characterized by sleep scientists as sleep misperception. Kay, however, argues that that term is based on the assumption that sleep is categorical, either being asleep or being awake, and that when you’re asleep you don’t have consciousness.
“I don’t think that’s necessarily true,” Kay said. “I think you can be consciously aware and your brain be in a sleep pattern. The question is: What role does conscious awareness have in our definition of sleep?”…’
Via Neuroscience News