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Iliocostalis Lumborum Muscle

image descriptionIliocostalis Lumborum:

Unlabelled image of the muscles of the back
Labelled image of the sternocleidomastoid, splenius capitis, splenius cervisis, iliocostalis cervicis, iliocostalis thoracis, external intercostals, longissimus thoracis, iliocostalis lumborum, and spinalis thoracis muscles
Labelled image of the splenius capitis, splenius cervicis, iliocostalis cervicis, iliocostalis thoracis, longissimus thoracis, iliocostalis lumborum, and spinalis thoracis muscles
Labelled image of the semispinalis capitis, longisimus capitid, spinalis cervicis, iliocostalis cervicis, iliocostalis thoracis, longissimus thoracis, iliocostalis lumborum, and spinalis thoracis
Labelled image of the longissimus capitis, spinalis cervicis, iliocostalis cervicis, iliocostalis thoracis, longissimus thoracis, iliocostals lumborum, and spinalis thoracis muscles
Labelled image of the longissimus capitis, iliocostalis cervicis, iliocostalis thoracis, longissimus thoracis, iliocostalis lumborum, and spinalis thoracis muscles
Labelled image of the iliocostalis cervicis, iliocostalis thoracis, and iliocostalis lumborum muscles
Labelled image of the iliocostalis thoracus, and iliocostalis lumborum muscles
(Muscularis Iliocostalis Lumborum)
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image descriptionAttachments of Iliocostalis Lumborum:  Origin & Insertion

Origin: medial and lateral sacral crests; medial iliac crest.

Insertion: angles of ribs 6 or 7 – 12.

Unlabelled image of the muscles of the back
Labelled image of the insertion and origin of the iliocostalis lumborum
Origin and insertion of the iliocostalis lumborum.
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Actions of the Iliocostalis Lumborum Muscle:

  1. Bilateral action: image descriptionextends lower vertebral column (= back).
Extensions of the vertebral column animation slide 1
Extensions of the vertebral column animation slide 2
Extensions of the vertebral column animation slide 3
Extensions of the vertebral column animation slide 4
Extension of the lower vertebral column
  1. Unilateral action: image descriptionLaterally flexes cervical (neck) vertebrae.
Lateral flexion of the vertebral column animation slide 1
Lateral flexion of the vertebral column animation slide 2
Lateral flexion of the vertebral column animation slide 3
Lateral flexion of the vertebral column animation slide 4
Lateral flexion of the vertebral column animation slide 5
Lateral flexion of the lower vertebral column.

Nerve Supply to Iliocostalis Lumborum:

  1. Dorsal primary rami of thoracic and lumbar spinal nerves.

Overview of the Muscles of the Back:

Test yourself with anwers hidden
Test yourself image showing answers: sternocleidomastoid, spinalis capitis, spinalis cervicis, iliocostalis cervicis, iliocostalis thoracis, external intercostals, longissimus thoracis, spinalis thoracis, iliocostalis lumborum
Test yourself image showing answer: spinalis capitis, spinalis cervicis, iliocostalis cervicis, iliocostalis thoracis, longissimus thoracis, spinalis thoracis, iliocostalis lumborum
Test yourself image showing answer: semispinalis capitis, longissimus capitis, spinalis cervicis, iliocostalis cervicis, iliocostalis thoracis, longissimus thoracis, spinalis thoracis, iliocostalis lumborum
Test yourself image showing answers: longissimus thoracis, spinalis cervicis, iliocostalis cervicis, iliocostalis thoracis, longissimus thoracis, spinalis thoracis, iliocostalis thoracis.
Test yourself showing answers: longissimus cervicis, iliocostalis cervicis, iliocostalis thoracis, longissimus thoracis, iliocostalis lumborum
Test yourself image showing answers: iliocostalis cervicis, iliocostalis thoracis, iliocostalis lumborum
Test yourself image showing answers: Iliocostalis thoracis, iliocostalis lumborum
test yourself image showing answers: origin, and insertion of iliocostalis lumborum
Review the muscles of the back and test yourself.
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