Vastus lateralis muscle: Difference between revisions

Revision as of 23:59, 9 February 2025

A muscle in the thigh

Cross-section of the thigh showing the vastus lateralis

The vastus lateralis muscle is one of the four quadriceps femoris muscles, located in the thigh. It is the largest and most powerful part of the quadriceps group, which also includes the vastus medialis, vastus intermedius, and rectus femoris.

Anatomy

The vastus lateralis originates from the greater trochanter and the lateral lip of the linea aspera of the femur. It extends down the lateral side of the thigh and inserts into the patella via the quadriceps tendon. The muscle fibers are oriented in a slightly oblique direction, which contributes to its powerful extension capability.

Function

The primary function of the vastus lateralis is to extend the knee joint. It plays a crucial role in activities such as walking, running, and jumping. By extending the knee, it helps stabilize the leg and supports the body's weight during movement.

Innervation

The vastus lateralis is innervated by the femoral nerve, which arises from the lumbar plexus. The nerve fibers that supply the vastus lateralis originate from the L2, L3, and L4 spinal nerves.

Blood Supply

The blood supply to the vastus lateralis is primarily provided by the lateral circumflex femoral artery, a branch of the deep femoral artery.

Clinical Significance

Injuries to the vastus lateralis can occur due to overuse or trauma, leading to conditions such as muscle strains or tears. Rehabilitation often involves rest, physical therapy, and strengthening exercises to restore function.

Related pages

References

Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2013). Clinically Oriented Anatomy. Lippincott Williams & Wilkins.
Standring, S. (2015). Gray's Anatomy: The Anatomical Basis of Clinical Practice. Elsevier Health Sciences.

@@ Line 1: / Line 1: @@
-'''Vastus Lateralis Muscle'''
+{{Short description|A muscle in the thigh}}
+{{Use dmy dates|date=October 2023}}
-The '''Vastus Lateralis Muscle''' is one of the four muscles that make up the [[quadriceps femoris]] group, located in the anterior compartment of the thigh. It is the largest and most powerful part of the quadriceps femoris.
+[[File:Illu lower extremity muscles.jpg|thumb|right|Illustration of lower extremity muscles, including the vastus lateralis]]
+[[File:Vastus lateralis2.png|thumb|right|Location of the vastus lateralis muscle]]
+[[File:Slide8www.JPG|thumb|right|Cross-section of the thigh showing the vastus lateralis]]
+[[File:Im-vastus-lateralis.png|thumb|right|Vastus lateralis muscle]]
-== Anatomy ==
+The '''vastus lateralis muscle''' is one of the four [[quadriceps femoris]] muscles, located in the [[thigh]]. It is the largest and most powerful part of the quadriceps group, which also includes the [[vastus medialis]], [[vastus intermedius]], and [[rectus femoris]].
-The Vastus Lateralis originates from the upper part of the [[femur]], and it extends down the lateral side of the thigh to the [[patella]], or kneecap. It is responsible for extending the knee and stabilizing the patella.
+==Anatomy==
+The vastus lateralis originates from the [[greater trochanter]] and the lateral lip of the [[linea aspera]] of the [[femur]]. It extends down the lateral side of the thigh and inserts into the [[patella]] via the quadriceps tendon. The muscle fibers are oriented in a slightly oblique direction, which contributes to its powerful extension capability.
-=== Origin ===
+==Function==
+The primary function of the vastus lateralis is to extend the [[knee joint]]. It plays a crucial role in activities such as walking, running, and jumping. By extending the knee, it helps stabilize the leg and supports the body's weight during movement.
-The Vastus Lateralis originates from the upper part of the intertrochanteric line, the base of the [[Greater Trochanter]], the lateral lip of the [[Linea Aspera]], the lateral intermuscular septum and the gluteal tuberosity.
+==Innervation==
+The vastus lateralis is innervated by the [[femoral nerve]], which arises from the lumbar plexus. The nerve fibers that supply the vastus lateralis originate from the L2, L3, and L4 spinal nerves.
-=== Insertion ===
+==Blood Supply==
+The blood supply to the vastus lateralis is primarily provided by the lateral circumflex femoral artery, a branch of the [[deep femoral artery]].
-The Vastus Lateralis inserts into the [[Patellar tendon]] along with the other muscles of the quadriceps femoris.
+==Clinical Significance==
+Injuries to the vastus lateralis can occur due to overuse or trauma, leading to conditions such as muscle strains or tears. Rehabilitation often involves rest, physical therapy, and strengthening exercises to restore function.
-== Function ==
+==Related pages==
+* [[Quadriceps femoris muscle]]
+* [[Femoral nerve]]
+* [[Knee joint]]
-The primary function of the Vastus Lateralis is to extend the knee. It also plays a role in stabilizing the patella and the knee during walking or running.
+==References==
+* Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2013). ''Clinically Oriented Anatomy''. Lippincott Williams & Wilkins.
-== Clinical Significance ==
+* Standring, S. (2015). ''Gray's Anatomy: The Anatomical Basis of Clinical Practice''. Elsevier Health Sciences.
-The Vastus Lateralis is often used as an injection site for intramuscular injections. It is also a common site for muscle biopsy due to its accessibility and size.
-== See Also ==
-* [[Quadriceps femoris]]
-* [[Femur]]
-* [[Patella]]
-* [[Patellar tendon]]
-== References ==
-<references />
 [[Category:Muscles of the lower limb]]
-[[Category:Muscles of the hip]]
-[[Category:Muscles of the human body]]
-{{stub}}