Anatomy question: at 45:50 you say that the bone on the right is the navicular. But the navicular bone articulates with the distal talus. So what would be the bone we see in the middle of the screen? Isn't that the navicular bone and the bone on the right the medial cuneiform? I always struggle with the anatomy in this region because of the variablity in anatomy of the tibialis posterior and the extra sesamoids.
Hey Niek! I think you have a very sharp eye for sure. For time sake of this video, I focused on the typical insertion of the PTT to the Navicular, but it also sends fibers on the the cuniforms, especially on the plantar side, like we see in the minute/seconds segment you point out. One of my favorite MRI atlases does a great job showing all the attachment points at the Navicular/1st(Medial) cuniform joint, (main segment) then smaller segments at the middle and lateral cuniforms and even the Sustentaculum tali of the calcaneous but I've really never put focus on those fibers as it seems that main attachment gets all the attention.
