Questions and Answers
Erector Spinae unilaterally: __ the __ __ to the __ __
laterally flex the vertebral column to the same side
Erector Spinae bilaterally: __ the __ __
extend the vertebral column
Erector Spinae origin: __ surface of the __, __ __, __ process of the __ __ and last two __ __.
posterior surface of the sacrum, iliac crest, spinous process of the lower lumbar and last two thoracic vertebrae
Erector Spinae insertion: attaches __ to __, __ and __ processes of __ and __ vertebrae, and __ __ of __ __.
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What is the innervation of the Erector Spinae?
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Spinalis origin: __ __, __ process of __ __, __ __ vertebrae; __ __ and __ __ of -.
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Spinalis insertion: __ process of __ __, __ process of __ (except -).
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Longissimus origin: __ __, __ process of __ __ __ __.
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Longissimus insertion: __ __ ribs, __ processes of __ and __, __ process of __ bone.
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Iliocostalis origin: __ surface of __ -.
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Iliocostalis insertion: __ surface of ribs -, __ surface of ribs __ - __, __ process of __ __ and __ __.
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Study Notes
Erector Spinae Muscles Overview
- The Erector Spinae muscles function to laterally flex the vertebral column to the same side unilaterally and extend the vertebral column bilaterally.
Origin
- Originates from the posterior surface of the sacrum, iliac crest, spinous processes of lower lumbar and last two thoracic vertebrae.
Insertion
- Attaches to the ribs, spinous and transverse processes of cervical and thoracic vertebrae, and the mastoid process of the temporal bone.
Innervation
- Innervated by spinal nerves.
Spinalis Muscle
- Origin: Arises from a common tendon, spinous processes of upper lumbar and lower thoracic vertebrae, ligamentum nuchae, and spinous process of C-7.
- Insertion: Inserts on the spinous processes of upper thoracic and cervical vertebrae (except C-1).
Longissimus Muscle
- Origin: Originates from a common tendon and transverse process of upper five thoracic vertebrae.
- Insertion: Inserts on lower 9 ribs, transverse processes of thoracic and cervical vertebrae, and the mastoid process of temporal bone.
Iliocostalis Muscle
- Origin: Starts from the posterior surface of ribs 1-12.
- Insertion: Attaches to the posterior surface of ribs 1-6 (thoracic), posterior surface of ribs 6-12 (lumborum), and the transverse processes of lower cervical and lumbar vertebrae 1-3.
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Description
Test your knowledge of the Erector Spinae muscles with these flashcards. Learn about their origin, insertion, innervation, and actions in both unilateral and bilateral contexts. Perfect for students studying anatomy or preparing for exams.
