Supraspinous ligament: Difference between revisions
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== Introduction == | == Introduction == | ||
[[File:Cervical vertebrae lig flavum.png|thumb|362x362px|supraspinous ligament | |||
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The supraspinous ligament or '''supraspinal ligament''' is a strong fibrous cord that connects together the apices of the spinous processes from the seventh cervical vertebra to 3rd or 4th lumbar vertebrae. From vertebra C7 to the skull ligament becomes structurally distinct from more caudal parts of the ligament and is called the '''[[ligamentum nuchae]]'''.<ref name="gray's">Richard L. Drake, A. Wayne Vogl, and Adam W. M. Mitchell.Gray's Anatomy for Students.2nd edition published by Elsevier.</ref> | |||
[[File:Supraspinous_lig.jpg|right]] | |||
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== Anatomy == | |||
Origin: It originates from C7 vetebra.<br> | |||
Insertion/Terminates: Sacrum<br> | |||
The supraspinous ligament is well developed only in the upper lumbar region and may terminate at L3, although the most common termination site appears to be at L4. The ligament is almost always absent at L5/S1.<ref name=":0">Levangie PK, Norkin CC. Joint Structure and Function: A Comprehensive Analysis. 5th Edition. Philadelphia. F.A. Davis Company. 2011</ref> | |||
It is thicker and broader in the lumbar than in the thoracic region, it merges to thoracolumbar fascia.<ref name=":0" /> | |||
The most superficial fibers of this ligament extend over three or four vertebræ; those more deeply seated pass between two or three vertebræ while the deepest connect the spinous processes of neighboring vertebrae. | |||
\The deep layer of the supraspinous ligament is reinforced by tendinous fibers of the multifidus muscle. Between the spinous processes it is continuous with the interspinal ligaments.The middle fibers of the supraspinous ligament blend with the dorsal layer of the thoracolumbar fascia.<br> | |||
== Function == | == Function == | ||
*Limits flexion along with other ligaments of vetebral column. | *Limits flexion along with other ligaments of vetebral column. | ||
*The supraspinous ligament serves as a midline attachment for some important muscles. | *The supraspinous ligament serves as a midline attachment for some important muscles. | ||
*The supraspinous ligament helps maintain the upright position of the head.<br> | *The supraspinous ligament helps maintain the upright position of the head.<ref name=":0" /> | ||
*It's stretched in flexion, it`s fibers resist separation of spinous processes during forward flexion, during hyperflexion interspinous ligament and supraspinous ligament are the first to fail.<ref name=":0" /> | |||
*'''At lumbar region,''' through attachment of supraspinous ligament to thoracolumbar fascia and interspinous ligament they form together Interspinous_supraspinous thoracolumbar(IST) ligamentous complex which it`s function is to transfer tension that is placed on Thoracolumbar fascia to ligamentum flavum causing pretension in the neutral position <ref>Vleeming A ,Mooney V . [https://www.elsevier.com/books/movement-stability-and-lumbopelvic-pain/9780443101786 Movement, Stability & Lumbopelvic Pain 2nd Edition] . Philadelphia.Churchill Livingstone .1st March 2007</ref><br> | |||
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[[Category:Anatomy]] [[Category:Spine]] [[Category:Lumbar_Anatomy]] | [[Category:Anatomy]] | ||
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Revision as of 13:46, 2 April 2019
Original Editor Aarti Sareen
Top Contributors - Aarti Sareen, Ahmed Nasr, Kim Jackson and Naomi O'Reilly
Introduction[edit | edit source]
The supraspinous ligament or supraspinal ligament is a strong fibrous cord that connects together the apices of the spinous processes from the seventh cervical vertebra to 3rd or 4th lumbar vertebrae. From vertebra C7 to the skull ligament becomes structurally distinct from more caudal parts of the ligament and is called the ligamentum nuchae.[1]
Anatomy[edit | edit source]
Origin: It originates from C7 vetebra.
Insertion/Terminates: Sacrum
The supraspinous ligament is well developed only in the upper lumbar region and may terminate at L3, although the most common termination site appears to be at L4. The ligament is almost always absent at L5/S1.[2]
It is thicker and broader in the lumbar than in the thoracic region, it merges to thoracolumbar fascia.[2]
The most superficial fibers of this ligament extend over three or four vertebræ; those more deeply seated pass between two or three vertebræ while the deepest connect the spinous processes of neighboring vertebrae.
\The deep layer of the supraspinous ligament is reinforced by tendinous fibers of the multifidus muscle. Between the spinous processes it is continuous with the interspinal ligaments.The middle fibers of the supraspinous ligament blend with the dorsal layer of the thoracolumbar fascia.
Function[edit | edit source]
- Limits flexion along with other ligaments of vetebral column.
- The supraspinous ligament serves as a midline attachment for some important muscles.
- The supraspinous ligament helps maintain the upright position of the head.[2]
- It's stretched in flexion, it`s fibers resist separation of spinous processes during forward flexion, during hyperflexion interspinous ligament and supraspinous ligament are the first to fail.[2]
- At lumbar region, through attachment of supraspinous ligament to thoracolumbar fascia and interspinous ligament they form together Interspinous_supraspinous thoracolumbar(IST) ligamentous complex which it`s function is to transfer tension that is placed on Thoracolumbar fascia to ligamentum flavum causing pretension in the neutral position [3]
References[edit | edit source]
- ↑ Richard L. Drake, A. Wayne Vogl, and Adam W. M. Mitchell.Gray's Anatomy for Students.2nd edition published by Elsevier.
- ↑ 2.0 2.1 2.2 2.3 Levangie PK, Norkin CC. Joint Structure and Function: A Comprehensive Analysis. 5th Edition. Philadelphia. F.A. Davis Company. 2011
- ↑ Vleeming A ,Mooney V . Movement, Stability & Lumbopelvic Pain 2nd Edition . Philadelphia.Churchill Livingstone .1st March 2007