Origins and Insertions

The video tutorial explains muscle contraction, focusing on the roles of myosin and actin myofilaments. It describes how muscles, attached to bones via tendons, cause bone movement. The concepts of origin and insertion are introduced, with the origin being the fixed bone and the insertion being the mobile bone. The tutorial highlights that these roles can change depending on bone stabilization. An example using the gluteus medius muscle illustrates how the femur and ilium can interchange roles as origin and insertion. The video concludes by suggesting the use of terms like proximal and distal attachments to avoid confusion.

How does the gluteus medius muscle function during leg movement?

Why might a teacher prefer to use the terms proximal attachment and distal attachment instead of origin and insertion?