Vastus lateralis
Vastus Lateralis
The Vastus Lateralis (/ˈvæstəs ləˈtɛrəlɪs/), also known as the lateral vastus muscle, is one of the four muscles in the quadriceps group, located in the anterior compartment of the thigh.
Etymology
The term "Vastus" is derived from the Latin word 'vastus' meaning 'huge' or 'great'. "Lateralis" is derived from the Latin word 'lateralis' meaning 'to the side'. Thus, the term 'Vastus Lateralis' refers to the large muscle on the side of the thigh.
Anatomy
The Vastus Lateralis originates from the upper part of the femur, and it extends down the side of the thigh to insert into the patella, or kneecap, via the quadriceps tendon. It is the largest and most powerful part of the quadriceps group.
Function
The primary function of the Vastus Lateralis is to extend the knee joint. It also plays a role in stabilizing the knee and assisting in walking, running, and jumping.
Related Terms
- Quadriceps Femoris: The muscle group that the Vastus Lateralis is a part of.
- Vastus Medialis: The muscle located medially to the Vastus Lateralis in the quadriceps group.
- Vastus Intermedius: The muscle located between the Vastus Medialis and Vastus Lateralis.
- Rectus Femoris: The fourth muscle in the quadriceps group, located centrally.
See Also
External links
- Medical encyclopedia article on Vastus lateralis
- Wikipedia's article - Vastus lateralis
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