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Longissimus Thoracis Muscle

image descriptionLongissimus Thoracis:

Unlabelled image of the muscles of the back
Labelled image of the splenius capitis, splenius cervicis, 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
Labelledd image of the semispinalis capitis, longissimus capitis, spinalis cervicis, longissimus cervicis, iliocostalis cervicis, iliocostalis thoracis, longissimus thoracis, iliocostalis lumborum, and spinalis thoracis muscles
Labelled image of the longissimus capitis, spinalis cervicis, longissimus cervicis, iliocostalis cervicis, iliocostalis thoracis, longissimus thoracis, iliocostalis lumborum, and spinalis thoracis muscles
Labelled image of the longissimus capitis, longissimus cervicis, iliocostalis cervicis, iliocostalis thoracis, longissimus thoracis, and iliocostalis thoracis muscles
Labelled image of the longissimus capitis, longissimus cervicis, and longissimus thoracis muscles
Labelled image of the longissimus capitis, and longissimus thoracis muscles
Labelled image of the longissimus thoracis
Muscularis longissimus thoracis
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image descriptionAttachments of Longissimus Thoracis:  Origin & Insertion

Origin: Transverse and spinous processes of lumbar vertebrae; sacrum and iliac crest via iliocostalis lumborum tendon & lumbosacral aponeurosis.

Insertion: Transverse processes of T1 РT12; between tubercles and angles of lower 9 to 10 ribs.

Unlabelled image of the muscles of the back
Labelled image of the insertion and origin of the longissimus thoracis muscle
Insertion and origin of the longissimus thoracis muscle.
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Actions of the Longissimus Thoracis Muscle:

  1. Bilateral action: image descriptionextends and hyperextends 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 vertebral column.
  1. Unilateral action: image descriptionlaterally flexes vertebral column to the same side.
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 vertebral column.

Nerve Supply to Longissimus Thoracis:

  1. dorsal rami of the 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: longissimus cervicis, and longissimus thoracis
Test yourself image showing answers: longissimus thoracis
Test yourself image showing answers: origin and insertion
Review the muscles of the back and test yourself.
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