A cat’s larynx can purr with no signal from the brain
That tiny rumble turns out to work like a meow or a human voice – cats just have specially ‘padded’ vocal folds.
Takeaway
Excised cat larynges vibrated at purring frequencies (25–30 Hz) with just airflow – no nerves needed.
What the study did
- The textbook view: cats purr because the brain fires the laryngeal muscles about 20–30 times a second.
- Researchers blew air through excised larynges from 8 domestic cats in a lab setup.
- All 8 larynges sustained vibration at purring rates of 25–30 Hz – with no nerves and no muscle contraction.
- The vocal folds contain connective-tissue pads up to 4 mm across, which help explain the unusually low pitch.
Limitations
Done on excised larynges; the authors say muscle and nerve activity may still contribute in living cats.
Citation
Herbst CT, Prigge T, Garcia M, Hampala V, Hofer R, Weissengruber GE et al. (2023). Domestic cat larynges can produce purring frequencies without neural input. Current Biology. DOI: 10.1016/j.cub.2023.09.014
For general information only; it does not replace advice from your vet.
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