The Mystery Muscle: Palmaris Longus and Evolution in Human Anatomy

The video tutorial explores the variability of certain muscles in the human body, focusing on the palmaris longus muscle in the forearm. It discusses the anatomy of the upper limb, the evolutionary reasons for muscle variability, and provides a simple test to check for the presence of the palmaris longus. The video also touches on the clinical use of this muscle's tendon for grafting.

What is the significance of having more muscles in the forearm compared to the upper arm?

What is the palmaris longus muscle and where is it located?

Describe the function of the palmaris longus muscle.

Why do some people have the palmaris longus muscle while others do not?

Discuss the role of environmental factors in the evolution of the palmaris longus muscle.

What are the implications of the palmaris longus muscle in evolutionary terms?

How can one test for the presence of the palmaris longus muscle?