01/07/2025
When the Ruhr U. in Germany (Current Biology 6/25) study demonstrated that cats tend to sleep on their left side, I was curious: why that was even a topic of research? And it wasn't direct observation of 100s of cats, but several hundred You Tube vids. Hm.
But 'researchers see this bias as an evolutionary advantage because it favors hunting and escape behavior after waking up.'
How do we know this? Their research says cats sleep 'in elevated place where their predator can only access them from below.' No. In my experience with thousands of ferals, strays and everything inbetween, I've not found that the case whatsoever.
Never mind.
Back to 'How do they...?'
Apparently, cats sleeping on their left side observe their environment when they awaken 'with their left visual field, processed in the brain's right hemisphere, which specializes in spatial awareness, threat-processing and coordination of rapid escape movements.’ If Noodles then wakes, ‘visual info about predators or prey goes directly to the right hemisphere of the brain, which is best in processing them. Sleeping on the left side can therefore be a survival strategy,’ the researchers conclude.
Okay.