Where does purring come from in cats? - briefly
Purring in cats originates from the rapid contraction and relaxation of the laryngeal muscles, which causes vibrations in the vocal cords during both inhalation and exhalation.
Where does purring come from in cats? - in detail
The purring of cats originates from a complex interplay of physiological mechanisms and evolutionary adaptations. Cats produce purring sounds through the rapid, rhythmic contraction and relaxation of the laryngeal muscles, which occurs at a frequency of 25 to 150 Hertz. These contractions cause the vocal cords to separate and come together rapidly, creating vibrations that resonate through the cat’s body. The diaphragm and other surrounding muscles also contribute to the process, amplifying the sound. Purring is unique to felids and some related species, as it involves a specialized neural oscillator in the brainstem that controls the timing and coordination of these muscle movements. While the exact evolutionary origins of purring remain debated, it is widely believed to serve multiple functions, including communication, self-soothing, and even promoting healing. The low-frequency vibrations associated with purring have been shown to stimulate bone growth and tissue repair, suggesting a biological advantage. Cats purr in various emotional states, such as contentment, stress, or pain, indicating its multifaceted role in their behavior and physiology. The ability to purr is deeply rooted in their anatomy and neural circuitry, making it a distinctive and essential aspect of feline biology.