Flexor hallucis longus tendon

A vital tendon that connects muscles to the big toe, enabling movement and stability.

The flexor hallucis longus tendon is a strong, fibrous cord that attaches the flexor hallucis longus muscle to the big toe, also known as the hallux. This tendon plays a crucial role in the movement of the big toe while providing stability to the foot during activities such as walking, running, and jumping.

Terminologia Anatomica

tendo flexoris hallucis longi

System

Muscular system

Function

The primary function of the flexor hallucis longus tendon is to facilitate the flexion of the big toe. This action is essential for maintaining balance and providing propulsion during locomotion. By curling the big toe downward, the tendon helps to create a strong push-off force, which is particularly important during running and walking. Additionally, the flexor hallucis longus tendon plays a role in supporting the medial arch of the foot, contributing to overall foot stability. This stability is vital during various dynamic activities and sports, where rapid changes in direction are often required. The tendon also aids in the coordination of movements between the big toe and the other toes, ensuring smooth and efficient motion.

Location

The flexor hallucis longus tendon extends along the posterior aspect of the leg, originating from the fibula bone and the interosseous membrane that separates the tibia and fibula. As it travels downward, it passes behind the medial malleolus (the bony prominence on the inner side of the ankle) and inserts onto the base of the distal phalanx of the big toe. This pathway places the tendon in close proximity to other important structures in the foot, including various ligaments and tendons that support foot mechanics. The arrangement of the flexor hallucis longus tendon allows it to effectively contribute to the functional movements of the foot and toes.

Did You Know?

The flexor hallucis longus muscle, from which the tendon derives, is one of the deep posterior leg muscles responsible for many foot and ankle movements.
In activities like dancing and gymnastics, the strength and flexibility of this tendon are crucial for performing various maneuvers involving the big toe.
Injury to the flexor hallucis longus tendon can lead to significant challenges in mobility and balance, affecting both athletic performance and daily activities.