Tarsus (skeleton)

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Tarsus2

Tarsus refers to a cluster of bones in the foot of tetrapods, including humans, which form the ankle and part of the arch of the foot. The tarsus is a critical component of the skeletal system, providing support and facilitating movement.

Anatomy

The tarsus consists of seven bones arranged in two rows. These bones are:

• Talus: Also known as the ankle bone, it articulates with the tibia and fibula to form the ankle joint.
• Calcaneus: Known as the heel bone, it is the largest tarsal bone and forms the foundation of the rear part of the foot.
• Navicular: Located in front of the talus, it helps connect the talus to the cuneiform bones.
• Cuboid: Positioned on the lateral side of the foot, it connects the calcaneus to the fourth and fifth metatarsal bones.
• Cuneiform bones: There are three cuneiform bones (medial, intermediate, and lateral) that are situated between the navicular and the first three metatarsals.

Function

The tarsus plays a vital role in weight-bearing and movement. It provides a stable platform for the body while standing and acts as a lever to propel the body forward during walking and running. The arrangement of the tarsal bones allows for a combination of stability and flexibility, which is essential for various activities.

Clinical Significance

Injuries to the tarsus, such as fractures or dislocations, can significantly impact mobility and quality of life. Common conditions affecting the tarsus include ankle sprains, arthritis, and flat feet. Proper diagnosis and treatment are crucial for maintaining foot health and function.

Related Pages

• Foot
• Ankle
• Skeletal system
• Talus bone
• Calcaneus
• Navicular bone
• Cuboid bone
• Cuneiform bones
• Metatarsal bones
• Tibia
• Fibula