090 The Deltoideus Muscle: Origin, Insertion, and Action

Leslie Samuel discusses the deltoidea muscle, a complex intrinsic shoulder muscle. The video covers its origins, insertion, and actions. The origins are opposite to the trapezius muscle's insertion, and the muscle is divided into three parts: anterior, lateral, and posterior. Each part's contraction results in different actions: flexion, abduction, and extension. The video concludes with a review and encourages viewers to visit the website for more resources.

Where does the deltoid muscle insert?

What actions are caused by the anterior portion of the deltoid muscle?

What action does the lateral or acromial portion of the deltoid muscle cause?

What is the action of the posterior or spinal section of the deltoid muscle?

Summarize the different actions of the deltoid muscle based on which portion is contracting.

What is the name of the muscle discussed in the video?

What are the three points of origin for the deltoid muscle?