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Back muscles

Extensor muscles of the vertebral column

MuscleMuscle GroupAction
Splenius capitis Spinotransverse Laterally flex the head and neck and rotate the head to the same side. Together with splenius cervicis extend the head and neck.
Splenius cervicis Spinotransverse Laterally flex the head and neck and rotate the head to the same side. Together with splenius capitis extend the head and neck.
Iliocostalis Erector spinae Extension of the vertebral column, assist with lateral flexion of vertebral column, postural stabilization.
Longissimus Erector spinae Extends the back, neck, and head.
Spinalis Erector spinae Extension of the back, neck, and head.
Semispinalis Transversospinalis Extends the vertebral column and rotates it to the opposite side. Extends the head, weak rotation of head to opposite side.
Multifidus Transversospinalis Extension of the vertebral column, postural support of vertebral coumn, proprioceptive monitors of vertebral position.
Rectus capitits posterior major Suboccipital Extends the head, rotates the head to the side of the contracting muscle. Important postural muscle for head stabilization.
Rectus capitis posterior minor Suboccipital Extends the head, important postural muscle for head stabilization.
Obliquus capitis inferior Suboccipital Unilateral contraction rotates the head towards the same side.
Obliquus capitis superior Suboccipital Bends the head backwards and to the same side, inportant postural muscle for head stabilization.
Created by: saypleaseamy