[tri-med] Auditory processing across the sleep-wake cycle

You know that we all talk to our children, even when they are asleep - and a
lot of us keep saying that they know you are loving them and caring........
well scientists have now proven it!!

Neuron 2000;28(3):991-9.


Auditory processing across the sleep-wake cycle: simultaneous EEG and fMRI
monitoring in humans. [Comment In: Neuron. 2000 Dec;28(3):629-31 UI:
21094471]
PORTAS CM, KRAKOW K, ALLEN P, JOSEPHS O, ARMONY JL, FRITH CD.

Wellcome Department of Cognitive Neurology, London, United Kingdom.
cportas@xxxxxxxxxxxxxxxxx

We combined fMRI and EEG recording to study the neurophysiological responses
associated with auditory stimulation across the sleep-wake cycle. We found
that presentation of auditory stimuli produces bilateral activation in
auditory cortex, thalamus, and caudate during both wakefulness and nonrapid
eye movement (NREM) sleep. However, the left parietal and, bilaterally, the
prefrontal and cingulate cortices and the thalamus were less activated
during NREM sleep compared to wakefulness. These areas may play a role in
the further processing of sensory information required to achieve conscious
perception during wakefulness. Finally, during NREM sleep, the left amygdala
and the left prefrontal cortex were more activated by stimuli having special
affective significance than by neutral stimuli. These data suggests that the
sleeping brain can process auditory stimuli and detect meaningful events.


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