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Dr Kerry Walker is University Research Lecturer and principal investigator of the Walker group, a research team investigating how the activity of neurons in the brain gives rise to our perception of sound.
Why do we need sleep? Oxford researchers find the answer may lie in mitochondria
16 July 2025
A New study uncovers how a metabolic “overload” in specialised brain cells triggers the need to sleep. Sleep may not just be rest for the mind - it may be essential maintenance for the body’s power supply.

