The peroneus tertius muscle is entirely fibrous.

The peroneus tertius muscle is entirely fibrous.

• A. True
• B. False
• C. Partially fibrous
• D. Not fibrous

Answer: (A)

The main idea here is that muscles are made of contractile tissue (muscle fibers) wrapped in connective tissue, not purely fibrous tissue. The peroneus tertius is a small muscle of the lower leg that typically originates from the distal fibula and interosseous membrane and inserts on the dorsal base of the fifth metatarsal. When present, it functions to dorsiflex and evert the foot. Because it is a muscle, it contains muscle fibers, not something that is entirely fibrous like a tendon or ligament. There can be anatomical variation where this muscle is absent in some individuals, but its presence is not described as a purely fibrous structure. So the statement claiming it is entirely fibrous is not correct.

The main idea here is that muscles are made of contractile tissue (muscle fibers) wrapped in connective tissue, not purely fibrous tissue. The peroneus tertius is a small muscle of the lower leg that typically originates from the distal fibula and interosseous membrane and inserts on the dorsal base of the fifth metatarsal. When present, it functions to dorsiflex and evert the foot. Because it is a muscle, it contains muscle fibers, not something that is entirely fibrous like a tendon or ligament. There can be anatomical variation where this muscle is absent in some individuals, but its presence is not described as a purely fibrous structure. So the statement claiming it is entirely fibrous is not correct.