![PTTH neurons (green) connect the circadian clock (magenta) of the brain with the peripheral clock in the prothoracic gland. (Foto: AG Wegener)](/fileadmin/_processed_/5/a/csm_0530wegener-innere-uhr_1b85f0a6b0.jpg)
Multiple biological clocks control the daily rhythms of physiology and behavior in animals and humans. Whether and how these clocks are connected with each other is still a largely open question. A new study now shows that a central clock governs the circadian rhythms in certain cases.
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