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Spinalis Thoracis Muscle

image descriptionSpinalis Thoracis:

Unlabelled image of the muscles of the back.
Labelled image of the sternocleidomastoid, splenius capitis, splenius cervicis, iliocostalis cervicis, iliocostalis thoracis, external intercostals, longissimus thoracis, iliocostalis lumborum, spinalis thoracis.
Labelled image of the splenius capitis, splenius cervicis, iliocostalis cervicis, iliocostalis thoracis, longissimus thoracis, iliocostalis lumborum, and spinalis thoracis.
Labelled image of the semispinalis capitis, longissimus capitis, spinalis cervicis, splenius cervicis, iliocostalis cervicis, iliocostalis thoracis, longissimus thoracis, iliocostalis lumborum, and spinalis thoracis.
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 semispinalis capitis, spinalis cervicis, longissimus capitis, spinalis thoracis, and longissimus thoracis muscles
Labelled image of the spinalis cervicis, and spinalis thoracis muscles
Labelled image of the spinalis thoracis.
Muscularis spinalis thoracis.
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image descriptionAttachments of Spinalis Thoracis:  Origin & Insertion

Origin: Spinous processes of T11 (or T10) – L2 (or L3).

Insertion: Spinous processes of T3 (or T1/T2) – T8.

Unlabelled image of the muscles of the back.
Labelled image of the origin and insertion of the spinalis thoracis.
Origin and insertion of the spinalis thoracis.
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Actions of the Spinalis 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.

Nerve Supply to Spinalis Thoracis:

  1. dorsal rami of the thoracic and lumbar spinal nerves.

Overview of the Muscles of the Back:

Test yourself image answers hidden.
Test yourself image showing answers: trapezius, deltoid, latissimus dorsi
Test yourself image showing answers: supraspinatus, infraspinatus, teres minor, teres major
Test yourself image showing answers: levetor scapula, rhomboids minor, rhomboids major, serratus anterior
Test yourself image showing answers: serratus anterior superior, serratus posterior inferior
Test yourself image showing answers: sternocleidomastoid, splenius capitis, splenius cervicis, iliocostalis cervicis, iliocostalis thoracis, external intercostals, longissimus thoracis, spinalis thoracis, iliocostalis lumborum
Test yourself image showing answers: Semispinalis cervicis, longissimus cervicis, spinalis cervicis, longissimus cervicis, iliocostalis cervicis, iliocostalis thoracis, longissimus thoracis, iliocostalis lumborum, spinalis thoracis
Test yourself image showing answers: Longissimus capitis, spinalis cervicis, longissimus cervicis, iliocostalis cervicis, iliocostalis thoracis, longissimus thoracis, iliocostalis lumborum, spinalis lumborum
Test yourself image showing answers: Longissimus capitis, spinalis cervicis, longissimus cervicis, spinalis thoracis, longissimus thoracis
Test yourself image showing answers: Spinalis cervicis, spinalis thoracis
Test yourself image showing answers: spinalis thoracis
Test yourself image showing answers: Insertion, and origin
Review the muscles of the back and test yourself.
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