levatores costarum interspinales and intertransversarii

Longissimus distal attachment ribs between tubercle and angle posterior tubercle of the cervical transverse process mastoid process Spinalis distal attachment spinous processes of vertebrae What are the transversospinalis muscles Semispinalis, Multifidus, Rotatores: 1 brevis and 2 longus Semispinalis proximal attachment transverse processes of C4- T12 vertebrae Semispinalis distal attachment spinous processes in thoracic and cervical ( 4-6 levels) skull between superior and inferior nuchal line Semispinalis Multifidus muscles action Bilateral: extension of the spine One side: contralateral rotation of spine Multifidus proximal attachment posterior sacrum posterior iliac spine aponeurosis of erector spinae, sacro-iliac ligaments, mammillary processes of lumbar vertebrae, transverse processes of T1-T3, articular processes of C4-C7.

Multifidus distal attachment spinous process 2-4 segments up lumborum, thoracics, cervicis components Rotatores:Longus and brevis proximal attachment transverse processes of vertebrae Rotatores Longus and brevis distal attachment spinous process: 1 segment (brevis) 2 segments (longus) Rotatores Interspinales Intertransversarii main action spine stabalizers Interspinales proximal attachment spinous processes Interspinales distal attachment spinous process Intertransversarii proximal attachment transverse processes Intertransversarii distal attachment transverse processes Levatores Costarum proximal attachment transverse processes Levatores Costarum distal attachment ribs between tubercle and angle Levatores Costarum main actions stabilize costovertebral joints YOU MIGHT ALSO LIKE.

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Generally, the muscles of the transversospinalis group stabilize the vertebrae during localized movements of the intervertebral joints of the vertebral column.

These muscles lie on each side of the vertebral column, deep to the thoracolumbar fascia.

They span the entire length of the vertebral column, extending from the cranium to the pelvis.

The deep back muscles act together to provide support and maintain the bodys posture, as well as to produce movements of the head, neck, and trunk.

The main functions of these muscles are flexion, extension, lateral flexion and axial rotation of the vertebral column.

All of these muscles are innervated by the segmental branches of the posterior rami of spinal nerves, and are supplied by several arteries along the various regions of the vertebral column.

These flat muscles are located on the posterolateral aspect of the neck and the posterior upper thorax, overlying the deep muscles of the neck.

The splenius muscles both originate from the spinous processes of cervical and thoracic vertebrae.

It then passes superolaterally to insert on the mastoid process and the lateral third of the superior nuchal line of the occipital bone.

The blood supply for both muscles comes from the vertebral, occipital, superior intercostal, deep cervical and transverse cervical arteries.

This muscle group is the largest of the deep back muscles and lies on either side of the vertebral column between the spinous processes of the vertebrae and the angles of the ribs.

From lateral to medial, these are the iliocostalis, longissimus and the spinalis muscles.

Each muscle column is subdivided into regions (lumborum, thoracic, cervicis, capitis) based on which region of the axial skeleton it attaches to superiorly.

Each region of the iliocostalis muscle has a specific blood supply.

The iliocostalis cervicis is vascularized by the occipital, deep cervical and vertebral arteries.

The iliocostalis thoracis is supplied by the dorsal branches of posterior intercostal and subcostal arteries, while the dorsal branches of the lumbar and lateral sacral arteries supply the iliocostalis lumborum.

It is divided into three regions based on their attachments.

The longissimus capitis and cervicis are vascularized by the vertebral artery, deep cervical artery, superficial and deep descending branches of occipital artery and deep branch of the transverse cervical artery.

The longissimus thoracis on the other hand is supplied by the dorsal branches of superior intercostal, posterior intercostal, lateral sacral and median sacral arteries.

Unilateral contraction of the muscle results in ipsilateral lateral flexion of the spine.

The spinalis thoracis muscle is supplied by dorsal branches of the superior and posterior intercostal arteries, and branches of the lumbar arteries.

These muscles lie between the spinous and transverse processes of the vertebral column, deep to the erector spinae muscles.

They arise from the transverse processes of the vertebral column and run upwards and medially in an oblique fashion to insert on the spinous processes of superior vertebrae.

Levatores Costarum Interspinales And Intertransversarii