All Muscles of the Back (Unit 1)

Trapezius innervation

Accessory N (CN XI)

Latissimus Dorsi innervation

Thoracodorsal N

Rhomboideus major and minor innervation

Dorsal scapular N

Levator scapulae innervation

dorsal scapular N

serratus posterior superior innervation

anterior rami of upper thoracic Ns

serratus posterior inferior innervation

anterior rami of lower thoracic Ns

splenius capitis innervation

posterior rami of MIDDLE cervical nerves

splenius cervicis innervation

posterior rami of LOWER cervical nerves

iliocostalis lumborum innervation

posterior rami of spinal nerves

iliocostalis thoracis innervation

posterior rami of spinal nerves

iliocostalis cervicis innervation

posterior rami of spinal nerves

longissimus thoracis innervation

posterior rami of spinal nerves

longissimus cervicis innervation

posterior rami of spinal nerves

longissimus capitis innervation

posterior rami of spinal nerves

spinalis thoracis innervation

posterior rami of spinal nerves

spinalis cervicis innervation

posterior rami of spinal nerves

spinalis capitis innervation

posterior rami of spinal nerves

semispinalis thoracis innervation

posterior rami of spinal nerves

semispinalis cervicis innervation

posterior rami of spinal nerves

semispinalis capitis innervation

posterior rami of spinal nerves

multifidus innervation

posterior rami of spinal nerves

levatores costarum innervation

posterior rami of spinal nerves

rotatores innervation

posterior rami of spinal nerves

rectus capitis posterior major innervation

posterior ramus of C1

rectus capitis posterior minor innervation

posterior ramus of C1

superior oblique innervation

posterior ramus of C1

inferior oblique innervation

posterior ramus of C1

Trapezius origin

occipital bone

ligamentum nuchae

spinous processes C7-T12

Latissimus Dorsi origin

spinous processes T7-sacrum

iliac crest of pelvis

ribs 10-12

rhomboideus major origin

Spinous processes of T2-T5

Rhomboideus Minor origin

Spinous processes C7 and T1

inferior portion of ligamentum nuchae

Levator Scapulae origin

transverse processes of C1-C4

(one origin belly per vertebrae)

Serratus Posterior Superior origin

Spinous process C7-T3

Inferior portion of ligamentum nuchae

supraspinous ligament

Serratus Posterior Inferior origin

Spinous process T11-L3

supraspinous ligament

Splenius Capitis origin

inferior portion of ligamentum nuchae

spinous processes C7-T4

Splenius cervicis origin

spinous processes T3-T6

iliocostalis lumborum origin

sacrum

spinous processes lumbar vertebrae

spinous process T11-T12

supraspinous ligament T11-T12

iliac crest

iliocostalis thoracis origin

angles of lower 6 ribs (where lumborum inserts)

iliocostalis cervicis origin

angles of ribs 3-6

longissimus thoracis origin

sacrum

spinous processes lumbar vertebrae

spinous process T11-T12

supraspinous ligament T11-T12

iliac crest

longissimus cervicis origin

(TP of T1-T5)

transverse processes upper 4 or 5 thoracic vertebrae

longissimus capitis origin

(transverse process of T1-T5) transverse processes of upper 4 or 5 thoracic vertebrae

(articular process of C3-C7) articular processes of lower 3 or 4 cervical vertebrae

Spinalis thoracis origin

spinous processes of T10-L2

Spinalis cervicis origin

Lower part ligamentum nuchae

spinous process C7

spinalis capitis origin

transverse processes C7-T6

articular processes of C4-C6

semispinalis thoracis origin

Transverse processes of T6-T10

semispinalis cervicis origin

(TP T1-T5)

transverse processes of upper 5 or 6 thoracic vertebrae

semispinalis capitis origin

transverse processes C7-T6

articular processes of C4-C6

multifidus origin

sacrum, erector spinae origin

transverse processes of T vertebrae

articular processes of lower 4 cervical vertebrae

Rotatores origin

transverse processes of whole spinal column

'jump' every 1-2 vertebrae

Levatores Costarum origin

transverse processes C7-T11

(insert to rib below vertebra of origin)

rectus capitis posterior major origin

spinous process of axis, C2

rectus capitis posterior minor origin

posterior tubercle of atlas, C1

superior oblique origin

transverse process of atlas, C1

inferior oblique origin

spinous process of axis C2

Trapezius insertion

acromion and spine of scapula

lateral 1/3 of clavicle

Latissimus Dorsi insertion

Floor of intertubercular sulcus of humerus

rhomboideus major insertion

medial border of scapula INFERIOR to spine

rhomboideus minor insertion

medial border of scapula AT spine

Levator scapulae insertion

superior angle of scapula

serratus posterior superior insertion

upper border of ribs 2-5

serratus posterior inferior insertion

lower border of ribs 9-12

splenius capitis insertion

mastoid process of skull

skull BELOW superior nuchal line

splenius cervicis insertion

transverse processes C1-C3

iliocostalis lumborum insertion

angles of lower 6 ribs

iliocostalis thoracis insertion

angles of upper 6 ribs

transverse process C7

iliocostalis cervicis insertion

transverse process C4-C6

longissimus thoracis insertion

transverse processes T vertebrae

longissimus cervicis insertion

transverse processes C2-C6

longissimus capitis insertion

mastoid process of skull

spinalis thoracis insertion

spinous processes T1-T8

spinalis cervicis insertion

spinous process C2

spinalis capitis insertion

between superior and inferior nuchal lines of occipital bone

semispinalis thoracis insertion

(Spinous process of C6-T4)

Spinous processes upper 4 thoracic, lower 2 cervical vertebrae

semispinalis cervicis insertion

spinous processes C2-C5

semispinalis capitis insertion

between superior and inferior nuchal lines of occipital bone

multifidus insertion

base of spinous processes C2-L5

levatores costarum insertion

rib below vertebrae of origin

rotatores insertion

spinous procceses

rectus capitis posterior major insertion

LATERAL portion of occipital bone below inferior nuchal line

rectus capitis posterior minor insertion

MEDIAL portion of occipital bone below inferior nuchal line

superior oblique insertion

occipital bone between inferior and superior nuchal lines

inferior oblique insertion

transverse process of atlas

Trapezius function

upper fibers elevate scapula

middle fibers adduct scapula

lower fibers depress scapula

upper and lower fibers both work to rotate scapula when humerus is abducted above shoulder

Latissimus dorsi function

extend, adduct, and medially rotate humerus

Rhomboidues major and minor function

adduct, elevate scapula

levator scapula function

elevate scapula

laterally flexes neck when scapula fixed

serratus posterior superior function

elevates ribs 2-5

serratus posterior inferior function

depresses ribs

prevents lower ribs from elevating when diaphragm contracts

splenius cervicis function

Extend neck (bilateral contraction)

draw and rotate head to one side (unilateral contraction, ipsilateral)

splenius capitis function

draw head backward, extend neck (bilateral contraction)

rotate head to one side (unilateral contraction, ipsilateral)

iliocostalis lumborum function

Extend vertebral column (bilateral contraction)

laterally flexes vertebral column (unilateral contraction, ipsilateral)

iliocostalis thoracis function

Extend vertebral column (bilateral contraction)

laterally flexes vertebral column (unilateral contraction, ipsilateral)

iliocostalis cervicis function

Extend vertebral column (bilateral contraction)

laterally flexes vertebral column (unilateral contraction, ipsilateral)

longissimus thoracis function

Extend vertebral column (bilateral contraction)

laterally flexes vertebral column (unilateral contraction, ipsilateral)

longissimus cervicis function

Extend vertebral column (bilateral contraction)

laterally flexes vertebral column (unilateral contraction, ipsilateral)

longissimus capitis function

Extend head/vertebral column (bilateral contraction)

turns face to same side as contracted muscle (unilateral contraction)

spinalis thoracis function

Extend the vertebral column (bilateral contraction)

spinalis cervicis function

Extend the vertebral column (bilateral contraction)

spinalis capitis function

Extend the head/vertebral column (bilateral contraction)