An aponeurosis is a?

• A. Flattened sheet of tendon
• B. A type of muscle fiber
• C. A nerve sheath
• D. A bone

Answer: (A)

An aponeurosis is a flattened sheet of tendon. It’s a broad, fibrous connective tissue that spreads the force of a muscle over a wide area, attaching to skin or other structures rather than a single point on a bone. This flat sheet form helps distribute tension and provide a broad attachment surface, unlike a typical tendon, which is more cord-like and attaches to a bone. Examples include the galea aponeurotica on the scalp and the palmar aponeurosis in the hand. It’s not a muscle fiber, a nerve sheath, or a bone.