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How do a rodent’s jaw muscles help it gnaw and chew food?

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black-tailed prairie dog — rodent Black-tailed prairie dog (*Cynomys ludovicianus*).

Rodents rely on powerful and intricately divided masseter muscles to facilitate their specialized feeding habits. These muscles are attached to the jaw and skull in various arrangements, providing the necessary force for both gnawing and chewing.1

The mechanics of the rodent jaw are highly adapted to prevent tooth damage. The nature of the jaw articulation ensures that the incisors do not meet when the animal is chewing food, and conversely, the upper and lower cheek teeth (premolars and molars) do not make contact while the animal is gnawing. This structural arrangement, powered by the masseter muscles, allows rodents to efficiently process a wide variety of food sources while maintaining the integrity of their constantly growing teeth.1