Vastus Medialis Oblique: Difference between revisions
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== Description == | == Description == | ||
The Vastus Medialis Oblique (VMO) muscle is the muscle that makes up the distal most fibres of the [[Vastus Medialis|Vastus Medialis (VM)]] muscle of the [[Quadriceps Muscle|Quadriceps]].<ref name=":2">El Sawy MM, Mikkawy DM, El-Sayed SM, Desouky AM. | The Vastus Medialis Oblique (VMO) muscle is the muscle that makes up the distal most fibres of the [[Vastus Medialis|Vastus Medialis (VM)]] muscle of the [[Quadriceps Muscle|Quadriceps]].<ref name=":2">El Sawy MM, Mikkawy DM, El-Sayed SM, Desouky AM. [https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8017455/ Morphometric analysis of vastus medialis oblique muscle and its influence on anterior knee pain.] Anatomy & cell biology. 2021 Mar 1;54(1):1-9.</ref> The VMO and VM muscles are functionally different due to different orientation of muscle fibres. VMO runs obliquely and helps with medial translation of the [[Patella]] where VM runs more longitudinally and contributes more to knee extension. [[Patellofemoral Joint|Patellofemoral joint]] load is decreased by advanced and adequate medially directed force by the VMO.<ref name=":0">Peng YL, Tenan MS, Griffin L. [https://journals.physiology.org/doi/pdf/10.1152/japplphysiol.00702.2017 Hip position and sex differences in motor unit firing patterns of the vastus medialis and vastus medialis oblique in healthy individuals]. Journal of Applied Physiology. 2018 Jun 1;124(6):1438-46.</ref> | ||
[[File:VMO1.png|alt=|center|572x572px]] | [[File:VMO1.png|alt=|center|572x572px]] | ||
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=== Action === | === Action === | ||
VMO | The primary function the VMO muscle is to pull the patella medially. The alignment of the muscle fibres, which is horizontal, makes it the primary medial stabilizer of the patella. The VMO along with [[Vastus Lateralis|Vastus Lateralis (VL)]] helps align the patella within the trochlear groove during knee flexion and extension.<ref>Miao P, Xu Y, Pan C, Liu H, Wang C. [https://bmcmusculoskeletdisord.biomedcentral.com/articles/10.1186/s12891-015-0736-6 Vastus medialis oblique and vastus lateralis activity during a double-leg semisquat with or without hip adduction in patients with patellofemoral pain syndrome.] BMC musculoskeletal disorders. 2015 Dec;16(1):1-8.</ref> The VMO also participates in the last phase of knee extension. <ref name=":2" /> | ||
=== Nerve Supply === | |||
VMO recieves its nerve supply from the branches of the Femoral Nerve. <ref name=":1" /> | |||
=== Bood Supply === | |||
== References == | == References == | ||
Revision as of 06:40, 22 January 2024
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Description[edit | edit source]
The Vastus Medialis Oblique (VMO) muscle is the muscle that makes up the distal most fibres of the Vastus Medialis (VM) muscle of the Quadriceps.[1] The VMO and VM muscles are functionally different due to different orientation of muscle fibres. VMO runs obliquely and helps with medial translation of the Patella where VM runs more longitudinally and contributes more to knee extension. Patellofemoral joint load is decreased by advanced and adequate medially directed force by the VMO.[2]
Origin[edit | edit source]
The VMO has multiple points of origin. The muscle fibres largely originate from the pubic points of the Adductor Magnus tendon. The other points of origin include the medial lip of linea aspera and the medial supracondylar line.[1][3]
Insertion[edit | edit source]
VMO inserts onto the medial border of the patella and the knee joint capsule. It also has a small area where it directly continues with the patella tendon[1].
Action[edit | edit source]
The primary function the VMO muscle is to pull the patella medially. The alignment of the muscle fibres, which is horizontal, makes it the primary medial stabilizer of the patella. The VMO along with Vastus Lateralis (VL) helps align the patella within the trochlear groove during knee flexion and extension.[4] The VMO also participates in the last phase of knee extension. [1]
Nerve Supply[edit | edit source]
VMO recieves its nerve supply from the branches of the Femoral Nerve. [3]
Bood Supply[edit | edit source]
References[edit | edit source]
- ↑ 1.0 1.1 1.2 1.3 El Sawy MM, Mikkawy DM, El-Sayed SM, Desouky AM. Morphometric analysis of vastus medialis oblique muscle and its influence on anterior knee pain. Anatomy & cell biology. 2021 Mar 1;54(1):1-9.
- ↑ Peng YL, Tenan MS, Griffin L. Hip position and sex differences in motor unit firing patterns of the vastus medialis and vastus medialis oblique in healthy individuals. Journal of Applied Physiology. 2018 Jun 1;124(6):1438-46.
- ↑ 3.0 3.1 Rajput HB, Rajani SJ, Vaniya VH. Variation in morphometry of vastus medialis muscle. Journal of Clinical and Diagnostic Research: JCDR. 2017 Sep;11(9):AC01.
- ↑ Miao P, Xu Y, Pan C, Liu H, Wang C. Vastus medialis oblique and vastus lateralis activity during a double-leg semisquat with or without hip adduction in patients with patellofemoral pain syndrome. BMC musculoskeletal disorders. 2015 Dec;16(1):1-8.
