The structure indicated is the intermediate cuneiform bone of the foot.
The foot contains three groups of bones:
The intermediate cuneiform bone is one of seven tarsal bones. There are three groups of tarsal bones:
- Proximal group
- Intermediate group
- Distal group
The intermediate cuneiform bone belongs to the distal group of tarsal bones. There are three cuneiform bones:
- Lateral cuneiform
- Intermediate cuneiform
- Medial cuneiform
Anteriorly they articulate with the medial three metatarsals. Posteriorly they articulate with the navicular bone, and laterally they articulate with the cuboid bone.
Learn more about the bones of the foot in this anatomy tutorial.