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muscles 11.16
name | origin | insertion | action |
---|---|---|---|
splenius capitis | ligamentum nuchae &spinous processes of 7th vertebra & first 3 or 4 thoracic vertebra | occipital bone and mastoid process of temporal bone | bilaterally: extend head ~unilaterally; laterally flex & rotate head to same side as contracting muscle |
splenius cervicis | spinous processes of 3rd through 6th thoracic vertebra | transverse processes of first 2-4 cervical vertebra | bilaterally; extend head~ unilaterally; laterally flex and rotate head to same side as contraction muscle |
iliocostalis cervicis | superior 6 ribs | transverse processes of 4th to 6th cervical vertebra | bilaterally; muscles of each region(cerv,thor,and lumbar) extend and maintain posture of vertebral column of their respective regions~ unilaterally; laterally flex vertebral column of their respective columns |
iliocostalis thoracis | inferior 6 ribs | superior 6 ribs | bilaterally; muscles of each region(cerv,thor,and lumbar) extend and maintain posture of vertebral column of their respective regions~ unilaterally; laterally flex vertebral column of their respective columns |
ilicostalis lumborum | iliac crest | inferior 6 ribs | bilaterally; muscles of each region(cerv,thor,and lumbar) extend and maintain posture of vertebral column of their respective regions~ unilaterally; laterally flex vertebral column of their respective columns |
longissimus capitis | transverse processes of superior 4 thoracic vertebra and articular processes of inferior 4 cervical vertebra | mastoid process of temporal bone | bilaterally;both longissimus capitis muscles extend head~ unilaterally;rotate head to same side as contraction muscle |
longissimus cervicis | transverse processes of 4th and 5th thoracic vertebra | transverse processes of 2-6th cervical vertera | bilaterally; longissimus cervicis both longissimus thorasis muscles extend vertebral column of their respective rigions~ unilaterally; laterally flex vertebral column of their respective regions |
longissimus thoracis | transverse processes of lumbar region | transverse processes of all thoracic and superior lumbar vertebra and 9th and 10th rib | bilaterally; longissimus cervicis both longissimus thorasis muscles extend vertebral column of their respective rigions~ unilaterally; laterally flex vertebral column of their respective regions |
spinalis capitis | arises with semispinalis capitis | occipital bone | bilaterally;muscles of each region, extend vertebral column of their respective regions |
spinalis cervicis | ligamentum nuchar and spinous process of 7th cervical vertebra | spinous process of axis | bilaterally;muscles of each region, extend vertebral column of their respective regions |
spinalis thoracis | spinous processes of wuperior lumbar and inferior thoracic vertebra | spinous process of superior thoracic vertebra | bilaterally; muscles of each region extend vertebral column of thier respective region |
semispinalis capitis | transverse processes of first 6-7 thoracic vertebra and 7th cervical vertebra and articular process of 4-6th cervical vertebra | occipital bone | bilaterally;extend head, inilaterally; rotate head to side opppsite contraction muscle |
semispinalis cervicis | transverse processes of superior 5 of 6 thoracic vertebra | spinous processes of 1st to 5th cervical vertebra | bilaterally;both semispinalis cervicis and semispinalis thoracic muscles extend vertebral column of their respective regions ~ unilaterally;rotate head to side opposite contraction muscle |
semispinalis thoracis | transverse processes of 6th to 10th thoracic vertebra | spinous processes of superior 4 thoracic and last 2 cervical vertebra | bilaterally;both semispinalis cervicis and semispinalis thoracic muscles extend vertebral column of their respective regions ~ unilaterally;rotate head to side opposite contraction muscle |
multifidus | sacrum,ilium,transverse processes of lumbar,thoracic,and inferior 4 cervical vertebra | spinous process of a more superior vertebra | bilaterally; extend vertebral column~ unilaterally; rotate vertebral comlumn to side opposite contraction muscle |
rotatores | transverse processes of all vertebra | spinous process of vertebra superior to the one of origin | bilaterally; extend vertebral column~ unilaterally; rotate vertebral column to side opposite contraction muscle |
intersponales | superior surface of all spinous processes | inferior surface of spinous process of vertebra superior to the one of its origin | bilaterally;extend vertebral column ~ inilaterally; stabalize vertebral column during movement |
intertransversarii | transverse processes of all vertebraw | transverse process of vertrbra superior to the one of origin | bilaterally; extend vertebral column~ unilaterally; laterally flec vertebral column and stabalize during movements |
anterior scalene | transverse processes of 3rd through 6th cervical vertebra | first rib | bilaterally; right and left anterior scalene and middle scalene muscles flex head and elevate first ribs during deep inhalation~ unilaterally; laterally flex head to side opposite contrraction muscle |
middle scalene | transverse processes of inferior 6 cervical vertebra | first rib | bilaterally; right and left anterior scalene and middle scalene muscles flex head and elevate first ribs during deep inhalation~ unilaterally; laterally flex head to side opposite contrraction muscle |
posterior scalene | transverse processes of 4th through 6th cervical vertebra | second rib | bilaterally; flex head and elevate ribs during deep inhalation~ unilaterally; laterally flex head and rotate head side opposite contraction muscle |