Chewing primarily involves which muscle?

Chewing primarily involves which muscle?

• A. Masseter
• B. Temporalis muscle
• C. Lateral pterygoid
• D. Digastric muscle

Answer: (B)

Chewing relies on the jaw-closing muscles, with the masseter doing the heavy lifting. The masseter originates near the cheekbone and attaches to the mandible, producing powerful elevation of the jaw to bite and grind. The temporalis also helps by elevating the jaw and pulling it back slightly, but it doesn’t generate as much force as the masseter. Other muscles like the lateral pterygoid help with opening the jaw and grinding movements, while the digastric mainly assists in opening the jaw rather than chewing. So, the muscle primarily involved in chewing is the masseter.

Chewing relies on the jaw-closing muscles, with the masseter doing the heavy lifting. The masseter originates near the cheekbone and attaches to the mandible, producing powerful elevation of the jaw to bite and grind. The temporalis also helps by elevating the jaw and pulling it back slightly, but it doesn’t generate as much force as the masseter. Other muscles like the lateral pterygoid help with opening the jaw and grinding movements, while the digastric mainly assists in opening the jaw rather than chewing. So, the muscle primarily involved in chewing is the masseter.