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Gross Anatomy Set 01
Intrinsic Muscles of the Back
50
Anatomy
Professional
08/20/2013

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Term
Iliocostalis: Origin
Definition
Posterior Sacrum & Iliac Crest, sacroiliac ligaments, sacral and inferior lumbar spines
Term
Iliocostalis: Insertion
Definition

Angles of Ribs

Cervical Transverse Processes

Term
Iliocostalis: Innervation
Definition
Dorsal Primary Rami of Spinal n.
Term
Iliocostalis: Blood Supply
Definition
Spinal a.
Term
Iliocostalis: Action
Definition
Bilaterally: Extend vertebral column
Unilaterally: Laterally flex vertebral column
Term
Longissimus: Origin
Definition
Posterior Sacrum & Iliac Crest, sacroiliac ligaments, sacral and inferior lumbar spines
Term
Longissimus: Insertion
Definition

Mastoid Process of the skull

Inferior ends attach to transverse processes of thoracic and cervical vertebrae

Term
Longissimus: Innervation
Definition
Dorsal Primary Rami of Spinal n.
Term
Longissimus: Blood Supply
Definition
Spinal a.
Term
Longissimus: Action
Definition
Bilaterally: Extend vertebral column
Unilaterally: Laterally flex vertebral column
Term
Spinalis: Origin
Definition
Posterior Sacrum & Iliac Crest, sacroiliac ligaments, sacral and inferior lumbar spines
Term
Spinalis: Insertion
Definition
Spinous processes higher up (Thoracic and Cervical)
Term
Spinalis: Innervation
Definition
Dorsal Primary Rami of Spinal n.
Term
Spinalis: Blood Supply
Definition
Spinal a.
Term
Spinalis: Action
Definition
Bilaterally: Extend vertebral column
Unilaterally: Laterally flex vertebral column
Term
Splenius Capitis et Cervicis: Origin
Definition
Spines of Vertebrae T6 and higher
Term
Splenius Capitis et Cervicis: Insertion
Definition

Capitis: Mastoid Process and Lateral 1/3 of Superior Nuchal Line

Cervicis: Transverse Processes of Upper Cervical Vertebrae

Term
Splenius Capitis et Cervicis: Innervation
Definition
Dorsal Primary Rami of Spinal n.
Term
Splenius Capitis et Cervicis: Blood Supply
Definition
Spinal a.
Term
Splenius Capitis et Cervicis: Action
Definition
Extend neck, turn head or neck
Term
Semispinalis Capitis: Origin
Definition
Transverse processes of upper thoracic vertebrae
Term
Semispinalis Capitis: Insertion
Definition
On skull, between superior and inferior nuchal lines
Term
Semispinalis Capitis: Innervation
Definition
Dorsal Primary Rami of Spinal n.
Term
Semispinalis Capitis: Blood Supply
Definition
Spinal a.
Term
Semispinalis Capitis: Action
Definition
Extend/Laterally rotate head
Holds head up
Keeps neck straight
Term
Semispinalis Cervicis: Origin
Definition
Cervical and Thoracic transverse processes (inferior)
Term
Semispinalis Cervicis: Insertion
Definition
Cervical Spinous processes (superior)
Term
Semispinalis Cervicis: Innervation
Definition
Dorsal Primary Rami of Spinal n.
Term
Semispinalis Cervicis: Blood Supply
Definition
Spinal a.
Term
Semispinalis Cervicis: Action
Definition
Holds head up
Keep neck straight
Term
Multifidus: Origin
Definition

Transverse processes of C2-S5

More prominent on lower spine

Term
Multifidus: Insertion
Definition

Spinous Processes

Extending over 2-4 vertebral segments

Term
Multifidus: Innervation
Definition
Dorsal Primary Rami of Spinal n.
Term
Multifidus: Blood Supply
Definition
Spinal a.
Term
Multifidus: Action
Definition
Extend and Rotate Vertebral Column
Term
Rotatores: Origin
Definition
Transverse Processes
Term
Rotatores: Insertion
Definition

Spinous Processes

Attach 2-3 vertebrae up

Term
Rotatores: Innervation
Definition
Dorsal Primary Rami of Spinal n.
Term
Rotatores: Blood Supply
Definition
Spinal a.
Term
Rotatores: Action
Definition
Extend and Rotate Vertebral Column
Term
Interspinalis: Origin
Definition
Spinous Processes
Term
Interspinalis: Insertion
Definition
Spinous Processes
Term
Interspinalis: Innervation
Definition
Dorsal Primary Rami of Spinal n.
Term
Interspinalis: Blood Supply
Definition
Spinal a.
Term
Interspinalis: Action
Definition
Extends Vertebral Column
Term
Intertransversarii: Origin
Definition
Transverse Processes
Term
Intertransversarii: Insertion
Definition
Transverse Processes
Term
Intertransversarii: Innervation
Definition
Dorsal Primary Rami of Spinal n.
Term
Intertransversarii: Blood Supply
Definition
Spinal a.
Term
Intertransversarii: Action
Definition
Extends and Laterally Flexes Vertebral Column
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