Splenius capitis muscle
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210272145
2008-05-05T07:22:21Z
213.227.110.69
/* Origin, insertion, and innervation */
{{Muscle infobox |
Name = Splenius capitis muscle |
Latin = musculus splenius capitis |
GraySubject = 115 |
GrayPage = 397 |
Image = Splenius.png |
Caption = Muscles connecting the upper extremity to the vertebral column. (Splenius capitis et cervicis labeled at upper right.) |
Image2 = Gray384.png |
Caption2 = Section of the neck at about the level of the sixth [[cervical vertebra]]. Showing the arrangement of the [[fascia coli]]. (Splenius capitis labeled at bottom right.) |
Origin = Ligamentum nuchae, spinous process of C7-T6 |
Insertion = Mastoid process of temporal and occipital bone |
Action = Extend, rotate, and laterally flex the head |
Blood = |
Nerve = C3, C4 |
MeshName = |
MeshNumber = |
DorlandsPre = m_22 |
DorlandsSuf = 12550912 |
}}
The '''splenius capitis''' is a muscle of the neck.
==Origin, insertion, and Innervation==
It arises from the lower half of the [[ligamentum nuchæ]], from the spinousial process of the seventh [[cervical vertebra]], and from the [[spinous processes]] of the upper three or four [[thoracic vertebræ]].
The fibers of the muscle are directed upward and lateralward and are inserted, under cover of the [[Sternocleidomastoideus]], into the [[mastoid process]] of the [[temporal bone]], and into the rough surface on the [[occipital bone]] just below the lateral third of the [[superior nuchal line]].
The Splenius Capitis muscle is innervated by the dorsal rami of C1-C8.
==Function==
The splenius muscle is a prime mover for head extension. The splenius capitis can also rotate the head by activation of only one side.
==Etymology==
The name derives from the Greek word "spléníon," which means plaster or patch.
==Additional images==
<gallery>
Image:Gray129.png|Occipital bone. Outer surface.
Image:Gray137.png|Left temporal bone. Outer surface.
Image:Gray385.png|Muscles of the neck. Lateral view.
</gallery>
==External links==
* {{MuscleLoyola|spca}}
* {{SUNYAnatomyFigs|01|03|01}} - "Superficial layer of the extrinsic muscles of the back."
* {{SUNYAnatomyFigs|01|05|01}} - "Intermediate layer of the extrinsic muscles of the back, deep muscles."
* {{SUNYAnatomyFigs|24|01|02}} - "Identification of the muscles associated with the [[posterolateral triangle]]."
* {{eMedicineDictionary|Splenius+capitis}}
* [http://www.ptcentral.com/muscles/muscletrunk.html#splenius%20capitis PTCentral]
{{Gray's}}
{{Muscles_of_trunk}}
{{muscle-stub}}
[[Category:Muscles of the trunk]]
[[de:Musculus splenius]]
[[it:Muscolo splenio del capo]]
[[ja:頭板状筋]]
[[sr:Завојни мишић главе]]