Muscles of Deep Back & Neck

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11 Terms

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Erector Spinae: Iliocostalis

Origin:

Cervicis: Superior 6 ribs

Thoracis: Inferior 6 ribs

Lumborum: Iliac crest

Insertion:

Cervicis: TP of C4-C6

Thoracis: Superior 6 ribs

Lumborum: Inferior 6 ribs

Action: Together: Extend and maintain erect posture of spine Singly: Laterally flex vertebral column of respective region

Innervation: Spinal Nerves

<p>Erector Spinae: Iliocostalis </p><p>Origin:</p><p><strong>Cervicis</strong>: Superior 6 ribs </p><p><strong>Thoracis</strong>: Inferior 6 ribs</p><p><strong>Lumborum</strong>: Iliac crest</p><p>Insertion:</p><p><strong>Cervicis</strong>: TP of C4-C6</p><p><strong>Thoracis</strong>: Superior 6 ribs</p><p><strong>Lumborum</strong>: Inferior 6 ribs</p><p>Action:<strong> Together</strong>: Extend and maintain erect posture of spine<strong> Singly</strong>: Laterally flex vertebral column of respective region </p><p>Innervation: Spinal Nerves</p>

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Erector Spinae: Longissimus

Origin:

Capitis: TP of T1-T4 vertebrae and articular processes of C4-C7

Cervicis: TP of T4-T5

Thoracis: TP of L1-L5

Insertion:

Capitis: Mastoid process

Cervicis: TP of C2-C6

Thoracis: TP of thoracic and lumbar vertebrae, ribs 9 and 10

Action: Together: Extend vertebral column at respective region Singly: Laterally flex vertebral column of respective region

Innervation: Spinal Nerves

<p>Erector Spinae: Longissimus </p><p>Origin: </p><p><strong>Capitis</strong>: TP of T1-T4 vertebrae and articular processes of C4-C7</p><p><strong>Cervicis</strong>: TP of T4-T5</p><p><strong>Thoracis</strong>: TP of L1-L5</p><p>Insertion:</p><p><strong>Capitis</strong>: Mastoid process</p><p><strong>Cervicis</strong>: TP of C2-C6</p><p><strong>Thoracis</strong>: TP of thoracic and lumbar vertebrae, ribs 9 and 10</p><p>Action: <strong>Together</strong>: Extend vertebral column at respective region <strong>Singly</strong>: Laterally flex vertebral column of respective region</p><p>Innervation: Spinal Nerves</p>

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Erector Spinae: Spinalis

Origin:

Capitis: Arises with semispinalis capitis

Cervicis: ligamentum nuchae and spinous process of C7

Thoracis: Spinous processes of superior lumbar and inferior thoracic vertebrae

Insertion:

Capitis: Occipital bone

Cervicis: Spinous process of axis

Thoracis: Spinous processes of superior thoracic vertebrae

Action: Together: Extend vertebral column at respective regions

Innervation: Spinal nerves

<p>Erector Spinae: Spinalis</p><p>Origin: </p><p><strong>Capitis</strong>: Arises with semispinalis capitis</p><p><strong>Cervicis</strong>: ligamentum nuchae and spinous process of C7</p><p><strong>Thoracis</strong>: Spinous processes of superior lumbar and inferior thoracic vertebrae </p><p>Insertion:</p><p><strong>Capitis</strong>: Occipital bone</p><p><strong>Cervicis</strong>: Spinous process of axis</p><p><strong>Thoracis</strong>: Spinous processes of superior thoracic vertebrae </p><p>Action: <strong>Together</strong>: Extend vertebral column at respective regions</p><p><strong>Innervation</strong>: Spinal nerves</p>

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Transversospinalis/Semispinalis

Origin:

Capitis: TP of C7 and T1-T7 and AP of C4-C6

Cervicis: TP of T1-T6

Thoracis: TP of T6-T10

Insertion:

Capitis: Occipital Bone

Cervicis: Spinous processes of C1-5

Thoracis: Spinous processes of C6-C7 and T1-T4

Action: Together: Extend vertebral column at respective region Singly: Rotate head to the opposite side

Innervation: Spinal Nerves

<p>Transversospinalis/Semispinalis</p><p>Origin: </p><p><strong>Capitis</strong>: TP of C7 and T1-T7 and AP of C4-C6</p><p><strong>Cervicis</strong>: TP of T1-T6</p><p><strong>Thoracis</strong>: TP of T6-T10</p><p>Insertion: </p><p><strong>Capitis</strong>: Occipital Bone</p><p><strong>Cervicis</strong>: Spinous processes of C1-5</p><p><strong>Thoracis</strong>: Spinous processes of C6-C7 and T1-T4</p><p>Action: <strong>Together</strong>: Extend vertebral column at respective region <strong>Singly</strong>: Rotate head to the opposite side</p><p>Innervation: Spinal Nerves</p>

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Multifidis

Origin: Sacrum, ilium, transverse processes of lumbar, thoracic, and C4-C7

Insertion: Spinous processes of a more superiior vertebra

Action: Together: Extend vertebral column Singly: Laterally flex vertebral column and rotate head to opposite side

Innervation: Spinal Nerves

<p>Multifidis</p><p>Origin: Sacrum, ilium, transverse processes of lumbar, thoracic, and C4-C7</p><p>Insertion: Spinous processes of a more superiior vertebra </p><p>Action: <strong>Together</strong>: Extend vertebral column <strong>Singly</strong>: Laterally flex vertebral column and rotate head to opposite side</p><p>Innervation: Spinal Nerves</p>

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Rotatores

Origin: Transverse Processes of all vertebrae

Insertion: Spinous process of vertebra superior to the one of the origin

Action: Together: Extend vertebral column Singly: Rotate Vertebral column to the opposite side

Innervation: Spinal Nerves

<p>Rotatores</p><p>Origin: Transverse Processes of all vertebrae</p><p>Insertion: Spinous process of vertebra superior to the one of the origin</p><p>Action: <strong>Together</strong>: Extend vertebral column <strong>Singly</strong>: Rotate Vertebral column to the opposite side</p><p>Innervation: Spinal Nerves</p>

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Scalenes Anterior

Origin: Transverse Processes C3-C6

Insertion: First rib

Action: Together: Flex neck and Raises 1st rib during deep inhalation Singly: Laterally flex and rotate neck to the same side

Innervation: Cervical nerves

<p>Scalenes Anterior</p><p>Origin: Transverse Processes C3-C6</p><p>Insertion: First rib</p><p>Action: <strong>Together</strong>: Flex neck and Raises 1st rib during deep inhalation <strong>Singly</strong>: Laterally flex and rotate neck to the same side</p><p>Innervation: Cervical nerves</p>

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Scalenes Middle

Origin: Transverse Processes C2-C7

Insertion: First rib

Action: Together: Flex neck and Raises 1st rib during deep inhalation Singly: Laterally flex and rotate neck to the same side

Innervation: Cervical Nerves

<p>Scalenes Middle</p><p>Origin: Transverse Processes C2-C7</p><p>Insertion: First rib</p><p>Action: <strong>Together</strong>: Flex neck and Raises 1st rib during deep inhalation <strong>Singly</strong>: Laterally flex and rotate neck to the same side</p><p>Innervation: Cervical Nerves</p>

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Scalenes Posterior

Origin: Transverse Processes C4-C6

Insertion: Second Rib

Action: Together: Flex neck and Raises 2nd rib during deep inhalation Singly: Laterally flex and rotate neck to the opposite side

Innervation: Cervical nerves

<p>Scalenes Posterior</p><p>Origin: Transverse Processes C4-C6</p><p>Insertion: Second Rib</p><p>Action: <strong>Together</strong>: Flex neck and Raises 2nd rib during deep inhalation <strong>Singly</strong>: Laterally flex and rotate neck to the opposite side</p><p>Innervation: Cervical nerves</p>

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Sternocleidomastoid

Origin: Sternum and Clavicle

Insertion: Mastoid Process

Action: Together: Flex cervical portion of vertebral column, extend head, and elevate sternum during forced inhalation Singly: Laterally flex and rotate neck to the opposite side

Innervation: spinal accessory

<p>Sternocleidomastoid </p><p>Origin: Sternum and Clavicle </p><p>Insertion: Mastoid Process</p><p>Action: <strong>Together</strong>: Flex cervical portion of vertebral column, extend head, and elevate sternum during forced inhalation <strong>Singly</strong>: Laterally flex and rotate neck to the opposite side</p><p>Innervation: spinal accessory </p><p></p>

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Platysma

Origin: Fascia over deltoid and pectoralis major muscles

Insertion: Mandible and skin of lower face

Action: Depresses mandible, depresses and draws lower lip laterally, draws up skin of chest

Innervation: Facial nerve

<p>Platysma </p><p>Origin: Fascia over deltoid and pectoralis major muscles </p><p>Insertion: Mandible and skin of lower face</p><p>Action: Depresses mandible, depresses and draws lower lip laterally, draws up skin of chest</p><p>Innervation: Facial nerve </p>