Erector Spinae Anatomy

⭐ Erector Spinae Muscle Anatomy ⭐

The erector spinae is a large and long group of muscles which are located on the posterior of the body. The erector spinae group consists of: the spinalis, the longissimus, and the iliocostalis. These three muscles run parallel to the spine, from the sacrum to the neck. Their anatomy is below. Watch the video for a detailed explanation.

💪 Spinalis Origins 💪
🔴 Spinalis capitis: spinous processes of C6-T2 and nuchal ligament
🔴 Spinalis cervicis: spinous processes of C7-T1 and nuchal ligament
🔴 Spinalis thoracis: spinous processes of T11-L2 vertebrae

💪 Longissimus Origins 💪
🔴 Longissimus capitis: transverse processes of C4-T4
🔴 Longissimus cervicis: transverse processes of T1-T4
🔴 Longissimus thoracis: dorsal surface of sacrum & median sacral crest, posterior superior iliac spine, & transverse processes of L1-L5

💪 Iliocostalis Origins 💪
🔴 Iliocostalis cervicis: angle of ribs 3-6
🔴 Iliocostalis thoracis: angle of ribs 7-12
🔴 Iliocostalis lumborum: medial end of iliac crest, lateral crest of sacrum, & thoracolumbar fascia

💪 Spinalis Insertions 💪
🔵 Spinalis capitis: occiput
🔵 Spinalis cervicis: spinous processes of C2/C3
🔵 Spinalis thoracis: spinous processes of T2-T8

💪 Longissimus Insertions 💪
🔵 Longissimus capitis: posterior edge of mastoid process
🔵 Longissimus cervicis: transverse processes of C2-C6
🔵 Longissimus thoracis: transverse process of T1-T12 & dorsal aspect of ribs 3-12

💪 Iliocostalis Insertions 💪
🔵 Iliocostalis cervicis: transverse process of C4-C6
🔵 Iliocostalis thoracis: transverse process of C7 & angles of ribs 1-6
🔵 Iliocostalis lumborum: transverse processes of L1-L4 & angles of ribs 4-12

💪 Erector Spinae Actions 💪
🟢 Bilateral contraction: extension of the trunk, neck and vertebral column
🟢 Unilateral contraction: lateral flexion of the trunk, neck and vertebral column

💪 Erector Spinae Innervation 💪
🟣 Posterior rami of corresponding spinal nerves

💪 Spinalis Blood Supply 💪
🟠 Dorsal branches of posterior intercostal artery, deep cervical artery, muscular branches of vertebral artery

💪 Longissimus Blood Supply 💪
🟠 Vertebral artery, deep cervical artery, occipital artery, transverse cervical artery, superior intercostal artery, posterior intercostal artery, subcostal artery, lateral sacral artery, median sacral artery

💪 Iliocostalis Blood Supply 💪
🟠 Dorsal branches of posterior intercostal, subcostal, lumbar & lateral sacral arteries

❗ My other erector spinae videos ❗
- Spinalis Anatomy:    • Spinalis Anatomy: Origin, Insertion &...  
- Longissimus Anatomy:    • Longissimus Anatomy: Origin, Insertio...  
- Iliocostalis Anatomy:    • Iliocostalis Anatomy: Origin, Inserti...  


Chapters:
0:00 - Intro
0:06 - Location & overview of the erector spinae muscles
1:40 - Spinalis origins & insertions
3:26 - Longissimus origins & insertions
5:17 - Iliocostalis origins & insertions
6:41 - Erector spinae innervation
8:18 - Erector spinae actions
9:58 - Outro


⭐ Want to learn more about the erector spinae? Then check out the full article on the Bodyworks Prime website:
https://bodyworksprime.com/erector-sp...

⭐ If you need help remembering the erector spinae information, be sure to check out the free flashcards here:
Spinalis Flashcards: https://bodyworksprime.com/spinalis-f...
Longissimus Flashcards: https://bodyworksprime.com/longissimu...
Iliocostalis Flashcards: https://bodyworksprime.com/iliocostal...

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