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The Peroneus Tertius muscle, also called Fibularis Tertius, is one of the 3 fibularis muscles (fibularis longus, Fibularis Brevis). It is the most superficial muscle in the anterior compartment of leg.
In human anatomy, the fibularis tertius (also known as the peroneus tertius) is a muscle in the anterior compartment of the leg. It acts to tilt the sole of the foot away from the midline of the body and to pull the foot upward toward the body (dorsiflexion).
Fibularis tertius muscle, also called peroneus tertius, is located on the lower lateral aspect of the leg. It is part of the anterior, or extensor, compartment of the leg , together with three additional muscles; extensor digitorum longus , extensor hallucis longus and tibialis anterior .
The fibularis tertius (peroneus tertius) muscle is found in the anterior compartment of the leg. It is a thin, unipennate type of skeletal muscle. Superior to the ankle, the muscle belly travels deep to the superior retinaculum of the foot, where it passes through the tendinous sheath of fibularis tertius.
The peroneus tertius (fibularis tertius) is one of the muscles within the anterior compartment of the leg. Collectively, the muscles of the anterior compartment act to extend the toes, dorsiflex the ankle and invert the foot. The leg is comprised of anterior, lateral and posterior compartments.
Since its first description, two issues have been debated over the “fibularis tertius” muscle (FT) or “peroneus tertius” or “anterior fibularis”: whether the FT is a separate entity and whether it is exclusively human.
Peroneus tertius (PT) or Fibularis tertius, a muscle of the anterior compartment of the leg is very distinctive to the Homo sapiens. This is because of the evolutionary acquisition of bipedal gait along with the eversion of the foot, which are unique to humans.
The muscle group is normally composed of three muscles: fibularis longus, fibularis brevis, and fibularis tertius. [1] The fibularis longus and fibularis brevis are located in the lateral compartment of the leg and are supplied by the fibular artery and the superficial fibular nerve.
Origin: Distal anterior surface of the fibula. Insertion: Dorsal surface of metatarsal 5. Artery: Anterior tibial artery. Nerve: Deep fibular nerve. Action: Dorsi flexes and everts foot. Description: The Fibularis tertius muscle is a part of the Extensor digitorum longus, and might be described as its fifth tendon.
Fibularis (Peroneus) Teritius Muscle (Insertion, Origin, Actions & Innervations); explained beautifully in an illustrated and interactive way. Click and start learning now!