A look at the radius and ulna demonstrating the exact articular mechanics of forearm rotation. #anatomystandard #forearmbiomechanics #radioulnarjoint #pronation #supination #orthopedics #physicaltherapy #3danimation

Posterior view of the scapulothoracic joint during a lateral raise, demonstrating the opposing mechanics of the serratus anterior and rhomboids. Drop the next muscle group you want us to break down in the comments below. #anatomystandard #scapularbiomechanics #shoulderanatomy

An anterior section of the spinal column during axial rotation. The real-time range-of-motion sliders track the exact angular contribution of each spinal segment through the full rotational arc. Captured inside our app, Biomechanics of the Spine.

Check out the isolated rotator cuff in action during arm circumduction, as requested by @thanos.vlah on Instagram #arm #humerus #rotatorcuffsurgery #anatomystandard #shoulder

With the trapezius and deltoid removed, arm circumduction reveals the exact sequential engagement of the rotator cuff. Tell us what anatomical movement to break down next in the comments below. #rotatorcuff #shoulderbiomechanics #anatomystandard #orthopedics #physicaltherapy

Looking from the front and above gives an unobstructed view of how the biceps tendons and rotator cuff handle arm flexion and extension. ​Shoutout to @joe_walker for suggesting this angle! ​What muscle or movement would you like us to demonstrate next? Drop your ideas below! 📷

A close-up look at how the patella glides through the femoral groove during knee flexion and extension, acting as a fulcrum to give the quadriceps maximum mechanical advantage. Captured inside our app, Knee Biomechanics with Dr. Bertram Zarins. #anatomystandard #kneeanatomy

Watch the arm swing through its natural range of motion into flexion and extension with minimal scapular compensation. Which layer gives you the best understanding of joint movement—full muscle, deep layer, or pure bone? Let us know in the comments below! #anatomystandard

Watch the jaw move through a full cycle of opening and closing as we reveal the primary muscles of mastication layer by layer. Can you name the primary muscles of mastication? Drop them in the comments below! 👇 #anatomystandard #TMJ #mastication