Knee Lyon Legacy

04/11/2026

https://youtu.be/RSA2lVIx3p4
The whole course behind The Ribbon Wars is now free to access. Episode 9, “A Ligament That Feels”, closes the series.
The human ACL is an extremely innervated tissue. Mechanoreceptors tell the brain about tension, position and joint rotation. Georgoulis found them in ACL remnants attached to the PCL, and Adachi et al. showed that their number correlates with the accuracy of joint position sense. Which is why preserving remnants during reconstruction is worth discussing, keeping the Cyclops lesion risk in mind.
Want the full ACL anatomy course, free? Comment ACL and we will send you the access in a private message. The link is also in our bio.
Nine episodes, one ligament. Thank you for following the series every Wednesday, and a special nod to Freddie Fu, whose life’s work on ACL anatomy gave us the concept of individualized reconstruction. With thanks to Dr. Villa, and to Elcil Kaya and the Geneva duo Victoria Duthon and Jacques Menetrey, whose ideas and photos we borrowed.
A STAPFLIX production, directed

https://mailing.stap-formation.com/accueil-copie-69c641689d463/

The human ACL is an extremely innervated tissue. Mechanoreceptors t...

28/10/2026

https://youtu.be/uev47zsFKBE
THE RIBBON WARS — Episode 8: Race Against the Clock
The day your surgeon finishes the reconstruction, the clock starts.
Episode 8 of The Ribbon Wars follows the fragile blood supply of the ACL, from the middle genicular artery that feeds the native ligament to the three phases of graft healing. The graft starts out avascular. Revascularization begins around week 4, peaks between weeks 6 and 12, and the proliferation phase is the most vulnerable: the graft looks stronger, but it isn't ready for jogging, pivoting or jumping.
Ligamentization can take a year or more, and the graft may never fully match the original ligament.
🎬 Watch Episode 8 now
🎥 Directed by KLL
🎞️ A STAPFLIX Production
📅 New episode every Wednesday
https://mailing.stap-formation.com/accueil-copie-69c641689d463/

The day your surgeon finishes the reconstruction, the clock starts....

21/10/2026

THE RIBBON WARS — Episode 7: The Mechanics of Tension
Take a rope tied between two posts. Twist it in the middle. The posts haven't moved, yet the tension inside the fibers has just gone up.
Episode 7 of The Ribbon Wars explains how the ACL works in motion. In extension, the AM and PL bundles run almost parallel. As the knee flexes, the AM bundle wraps over the PL: one tightens while the other lets go. Add the image of a vessel moored by two cables, and you get the idea of reciprocal loading and fiber load-sharing.
Two bundles, one coordinated mechanism.
🎬 Watch Episode 7 now
🎥 Directed by KLL
🎞️ A STAPFLIX Production
📅 New episode every Wednesday
https://youtu.be/1z8vAvaTmwc
https://mailing.stap-formation.com/accueil-copie-69c641689d463/

Take a rope tied between two posts. Twist it in the middle. The po...

16/10/2026

https://www.youtube.com/watch?v=HE7mcJFPmhE
THE RIBBON WARS — Episode 6: X Marks the Spot
Every surgeon knows where the ACL attaches to the femur. But on the tibia, the map is far less obvious.
Episode 6 of The Ribbon Wars is your treasure map to the tibial insertion. Why the ACL doesn't attach on the tibial spines, how the retro-eminence ridge became one of the most reliable landmarks, and the exact boundaries that frame the footprint, with the bundle centers measured 17 mm and 10 mm in front of that ridge.
Memorize this diagram. It will guide your drill.
🎬 Watch Episode 6 now
🎥 Directed by KLL
🎞️ A STAPFLIX Production
📅 New episode every Wednesday


https://mailing.stap-formation.com/accueil-copie-69c641689d463/

Every surgeon knows where the ACL attaches to the femur. But on the...

07/10/2026

THE RIBBON WARS — Episode 5: The Surgeon's Most Common Mistake
One millimeter off on the femoral tunnel, and the whole reconstruction can pay the price.
Episode 5 of The Ribbon Wars goes straight to the most frequent error in ACL surgery: femoral tunnel positioning. We look at the "resident ridge," the lateral bifurcate ridge, and why the knee must be flexed at exactly 90° (not 80°, not 100°) to reproduce the same landmarks every time.
Know the anatomy. Be on familiar ground.
🎬 Watch Episode 5 now
🎥 Directed by KLL
🎞️ A STAPFLIX Production
📅 New episode every Wednesday
https://youtu.be/AMCAY4kxyIM

https://mailing.stap-formation.com/accueil-copie-69c641689d463/

One millimeter off on the femoral tunnel, and the whole reconstruct...

30/09/2026

THE RIBBON WARS — Episode 4: The Twist That Rewrote the Textbook
For decades, surgeons pictured the ACL as two separate cables running side by side. They were wrong.
Robert Smigielski's precision dissections that revealed the ACL isn't made of two bundles at all, but a single 2mm-thick ribbon of fibers, none of them inserting in front of the "resident ridge."
One anatomical detail. A century of assumptions, rewritten.

For decades, surgeons pictured the ACL as two separate cables runni...

23/09/2026

THE RIBBON WARS — Episode 3: 150 Years of Bundle Wars
The debate didn't start with Freddie Fu. It started in 1856.

Episode 3 of The Ribbon Wars traces 150 years of scientific controversy over the ACL's bundle structure — from the Weber brothers' first anatomical descriptions, through decades of conflicting studies, to the Pittsburgh team that reshaped modern consensus in the 2000s.
A century and a half of disagreement over a single ligament. Here's how we got there.
https://www.youtube.com/watch?v=R7Ly_p9OO9g
🎬 Watch Episode 3 now
🎥 Directed by KLL
🎞️ A STAPFLIX Production
📅 New episode every Wednesday

23/09/2026

THE RIBBON WARS — Quiz: Episode 2
Think you paid attention in Episode 2? Let's find out. 🧠

Question 1:
At what stage of development can the ACL first be visualized?
A) A 4-week embryo
B) An 8-week embryo
C) A 22-week fetus
D) A 42-week fetus

Question 2 (harder):
Which of these statements about ACL comparative anatomy is FALSE?
A) Dogs have a craniomedial bundle
B) Dogs have a caudolateral bundle
C) Some species show only one bundle
D) Most species show exactly 4 bundles

Drop your answers below 👇 — no cheating by rewatching Episode 2 first (okay, maybe a little cheating).
Answers revealed after hashtags.

🎥 Directed by KLL
🎞️ A STAPFLIX Production

Hashtags ( # version):


(Réponses : 1 → B ; 2 → D)THE RIBBON WARS — Quiz: Episode 2

15/09/2026

Long before you took your first step, your ACL was already there.
Episode 2 of The Ribbon Wars goes back to the very beginning — the embryonic and fetal development of the ACL, and what comparative anatomy across species reveals about how this ligament is built.
https://youtu.be/Six_gmQF0YE

Episode 2 of The Ribbon Wars goes back to the very beginning — the ...

09/09/2026

https://youtu.be/XIhK7HIDt2A
THE RIBBON WARS — Episode 1: A Small Wonder That Divides Surgeons
Every Wednesday

It's smaller than your little finger. It fits inside a joint the si...