Muscle of thorax; origin, tips of transverse processes of C7 and T1-T11 vertebrae; insertion, ribs, between tubercle and angle; action, elevate ribs for deep inspiration; nerve, dorsal rami of C8-T11 spinal nerves. Synonym(s): elevator muscle of rib, musculi levatores costarum. Deep – interspinales, intertransversarii and levatores costarum These three muscle groups are small, proprioceptive muscles that have minimal agonist action. They are of vital importance in maintaining an upright posture with continuous biofeedback to the antigravity muscles. They will only briefly be mentioned.

Levatores Costarum Function

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Term

Iliocostalis lumborum origin

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Splenius cervicis origin

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Splenius cervicis insertion

Definition

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What are the actions of the splenius muscles?

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Definition

course between mamillary processes of all lumbar vertebrae.

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cervical extension, contralateral rotation, ipsilateral side-bending.

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cervical ipsilateal rotation and side-bending

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Rhomboids action

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upper limb movement

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upper limb movement

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Levatores Costarum Interspinales And Intertransversarii