Vastus muscles: Difference between revisions

Revision as of 00:38, 10 February 2025

Group of muscles in the thigh

Vastus Muscles

The vastus muscles are a group of muscles located in the anterior compartment of the thigh. They are part of the quadriceps femoris muscle group, which is crucial for knee extension. The vastus muscles include the vastus lateralis, vastus medialis, vastus intermedius, and the vastus intermedius is sometimes considered to include the articularis genus.

Anatomy

The vastus muscles originate from the femur and insert into the patella via the quadriceps tendon. They are innervated by the femoral nerve and receive blood supply from the lateral circumflex femoral artery.

Vastus Lateralis

The vastus lateralis is the largest of the vastus muscles. It originates from the greater trochanter and the lateral lip of the linea aspera of the femur. It extends the knee and stabilizes the patella.

Vastus Medialis

The vastus medialis is located medially in the thigh. It originates from the intertrochanteric line and the medial lip of the linea aspera. It plays a key role in stabilizing the patella and extending the knee.

Vastus Intermedius

The vastus intermedius lies between the vastus lateralis and vastus medialis. It originates from the anterior and lateral surfaces of the femur. It is responsible for knee extension.

Function

The primary function of the vastus muscles is to extend the knee joint. This action is essential for activities such as walking, running, and jumping. The vastus medialis also helps in stabilizing the patella, preventing lateral displacement.

Clinical Significance

Injuries to the vastus muscles can result in pain and weakness in the knee. Conditions such as patellofemoral pain syndrome and quadriceps tendonitis are associated with dysfunction in these muscles. Strengthening exercises targeting the vastus muscles are often recommended in rehabilitation programs.

Images

Illustration of lower extremity muscles
Vastus lateralis muscle
Vastus medialis muscle
Vastus intermedius muscle
Muscles of the thigh
Vastus muscles in dissection
Vastus lateralis in dissection
Vastus medialis in dissection
Vastus intermedius in dissection

Related Pages

References

Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2013). Clinically Oriented Anatomy. Lippincott Williams & Wilkins.
Netter, F. H. (2014). Atlas of Human Anatomy. Elsevier Health Sciences.

@@ Line 1: / Line 1: @@
-'''Vastus Muscles''' are a group of muscles located in the anterior compartment of the thigh. They are part of the quadriceps muscle group, which is responsible for extending the knee joint. The vastus muscles include the [[Vastus Lateralis]], [[Vastus Medialis]], [[Vastus Intermedius]], and the [[Vastus Medialis Oblique]].
+{{short description|Group of muscles in the thigh}}
+{{Use dmy dates|date=October 2023}}
-==Etymology==
+==Vastus Muscles==
-The term "vastus" is derived from the Latin word "vastus," which means "huge" or "great." This is likely a reference to the size and strength of these muscles.
+The '''vastus muscles''' are a group of muscles located in the anterior compartment of the [[thigh]]. They are part of the [[quadriceps femoris]] muscle group, which is crucial for knee extension. The vastus muscles include the [[vastus lateralis]], [[vastus medialis]], [[vastus intermedius]], and the [[vastus intermedius|vastus intermedius]] is sometimes considered to include the [[articularis genus]].
-==Anatomy==
+===Anatomy===
-The vastus muscles originate from different areas of the femur, but they all insert into the patella via the quadriceps tendon. The [[Vastus Lateralis]] originates from the greater trochanter and lateral lip of the linea aspera of the femur. The [[Vastus Medialis]] originates from the medial lip of the linea aspera. The [[Vastus Intermedius]] originates from the anterior and lateral surfaces of the body of the femur. The [[Vastus Medialis Oblique]] is a part of the vastus medialis, but it has a separate insertion into the patella.
+The vastus muscles originate from the [[femur]] and insert into the [[patella]] via the quadriceps tendon. They are innervated by the [[femoral nerve]] and receive blood supply from the [[lateral circumflex femoral artery]].
-==Function==
+====Vastus Lateralis====
-The primary function of the vastus muscles is to extend the knee. They are also involved in stabilizing the patella and the knee joint during walking and running.
+The vastus lateralis is the largest of the vastus muscles. It originates from the greater trochanter and the lateral lip of the linea aspera of the femur. It extends the knee and stabilizes the patella.
+====Vastus Medialis====
+The vastus medialis is located medially in the thigh. It originates from the intertrochanteric line and the medial lip of the linea aspera. It plays a key role in stabilizing the patella and extending the knee.
+====Vastus Intermedius====
+The vastus intermedius lies between the vastus lateralis and vastus medialis. It originates from the anterior and lateral surfaces of the femur. It is responsible for knee extension.
+===Function===
+The primary function of the vastus muscles is to extend the knee joint. This action is essential for activities such as walking, running, and jumping. The vastus medialis also helps in stabilizing the patella, preventing lateral displacement.
 ==Clinical Significance==
-Injuries to the vastus muscles can result in pain and difficulty in extending the knee. Conditions such as [[Patellofemoral Pain Syndrome]] and [[Chondromalacia Patellae]] are often associated with dysfunction of the vastus medialis oblique.
+Injuries to the vastus muscles can result in pain and weakness in the knee. Conditions such as [[patellofemoral pain syndrome]] and [[quadriceps tendonitis]] are associated with dysfunction in these muscles. Strengthening exercises targeting the vastus muscles are often recommended in rehabilitation programs.
+==Images==
+<gallery>
+File:Illu_lower_extremity_muscles.jpg|Illustration of lower extremity muscles
+File:Gray244.png|Vastus lateralis muscle
+File:Gray245.png|Vastus medialis muscle
+File:Gray430.png|Vastus intermedius muscle
+File:Gray432_color.png|Muscles of the thigh
+File:Slide7CCCC.JPG|Vastus muscles in dissection
+File:Slide9WWWW.JPG|Vastus lateralis in dissection
+File:Slide2EA.JPG|Vastus medialis in dissection
+File:Slide1DEEA.JPG|Vastus intermedius in dissection
+</gallery>
-==Related Terms==
+==Related Pages==
-* [[Quadriceps Femoris]]
+* [[Quadriceps femoris]]
-* [[Knee Joint]]
+* [[Femoral nerve]]
-* [[Patella]]
+* [[Knee joint]]
-* [[Femur]]
-[[Category:Muscular System]]
+==References==
-[[Category:Anatomy]]
+* Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2013). ''Clinically Oriented Anatomy''. Lippincott Williams & Wilkins.
-[[Category:Orthopedics]]
+* Netter, F. H. (2014). ''Atlas of Human Anatomy''. Elsevier Health Sciences.
-{{stub}}
+[[Category:Muscles of the lower limb]]