Muscles OIIF

Trapezius Origin

superior nuchal line of occipital

occipital protuberance

ligamentum nuchae

C7- T12

Trapezius Insertion

lateral 1/3rd of clavicle

acromion process, spine of the scapula

base of scapular spine

Trapezius Innervation

spinal part of accessory nerve

Ventral rami of 3rd and 4th cervical nerves

Trapezius function

Lower trapezius draws the scapula down

Middle trapezius adducts the scapula

Upper trapezius draws the scapula upward

Latissimus Dorsi Origin

T7-T12

inferior thoracolumbar fascia

iliac crest

attaches a few ribs

inferior angle of scapula

Latissimus Dorsi Insertion

intertubercular groove of the humerus

Latissimus Dorsi innervation

thoracodorsal nerve

C6, C7 ( myotomes)

C8 is innervated slightly

Latissimus Dorsi Function

Extends, abducts, and medially rotates humerus at the shoulder

Levator Scapulae origin

transverse process of the atlas and axis

transverse processes of the third and fourth cervical vertebrae

levator scapulae innervation

dorsal scapular nerve; C5

3rd and 4th cervical nerves

Levator Scapulae insertion

Medial border between superior angle of scapula and spine

levator scapulae function

elevates the scapula

rotates the scapula down

Rhomboid Major Origin

T2-T5 vertebrae and supraspinous ligaments

Rhomboid Major insertion

medial border of scapula between the root of the spine and the inferior angle

Rhomboid Major innervation

dorsal scapular nerve; C4, C5

Rhomboid Major function

adducts the scapula

rotates the scapula down

rhomboid minor origin

lower part of the ligamentum nuchae

spines of C7-T1

Rhomboid minor insertion

triangular smooth surface at the medial end of the spine of scapular

Rhomboid minor innervation

dorsal scapular nerve; some of C4 but mostly C5

Rhomboid minor function

adducts the scapula

rotates the scapula down

serratus posterior inferior origin

spines of T11, T12, L1 and L2

serratus posterior inferior insertion

inferior borders of the lower 4 ribs

Serratus posterior inferior innervation

Ventral primary divisions of T9-T12

Serratus posterior inferior function

draws ribs down and out

Serratus posterior superior origin

lower part of ligamentum niche

spines of the 7th cervical and upper 2 thoracic vertebrae

Serratus Posterior Superior Insertion

upper borders of the second, third, fourth and fifth ribs

Serratus posterior superior innervations

ventral primary divisions of T1-T4

serratus posterior superior functions

draws ribs down and out

Splenius Capitis Origin

Lower half of the ligamentum nuchae

spine of C7-T4

Splenius Capitis insertion

mastoid process of the temporal bone

Splenius Capitis innervation

Posterior primary rami

Splenius Capitis Action

extends head and neck with rotation

Splenius Cervicis Origin

spines of the T3-T6 vertebrae

Splenius Cervicis Insertion

posterior tubercles of the transverse process of C1- C4

Splenius cervicis function

extend head and neck with rotation

Splenis cervicis innervation

posterior primary rami

iliocostal lumborum origin

Erector spinae tendon

iliac crest

Iliocostalis lumborum insertion

inferior borders of the angles of the lower 6 or 7 ribs

iliocostalis lumborum function

extends the vertebral column and bends it to one side

Iliocostalis thoracis origin

ribs 7-12

iliocostalis thoracis insertion

ribs 1-6

iliocostalis thoracis innervation

posterior primary rami

iliocostalis thoracis function

extends and bends vertabrae

iliocostalis cervicis origin

ribs 3-6

iliocostalis cervicis insertion

C4-C6 transverse processes

iliocostalis cervicis innervation

posterior primary rami

iliocostalis cervicis function

extends vertebrae to one side

Longissimus thoracis origin

L1-L5 transverse processes

longissimus thoracis insertion

T1-T12 transverse processes

ribs 3-12

longissimus thoracis innervation

posterior primary rami

longissimus thoracis function

extends and bends vertebrae to one side

draws ribs down

longissimus cervicis origin

L1-L5 transverse processes

medial to longissimus thoracis

longissimus cervicis insertion

transverse process of C2-C6

longissimus cervicis innervation

posterior primary rami

longissimus cervicis function

extends and bends vertebrae to one side

draws ribs down

longissimus capitis origin

T1-T5 transverse process

longissimus capitis insertion

posterior mastoid process

longissimus capitis innervation

posterior primary rami

longissimus capitis function

extends head and bends head to same side as rotated

origin:

spinalis thoracis

spinalis cervicis

spinalis captitis

spinous process in each region

insertion:

spinalis thoracis

spinalis cervicis

spinalis captitis

spinous process of vertebrae a few segments above

innervation:

spinalis thoracis

spinalis cervicis

spinalis captitis

posterior primary rami

function:

spinalis thoracis

spinalis cervicis

spinalis captitis

extend vertebral column

semispinalis thoracis origin

T6-T10 transverse processes

semispinalis thoracis insertion

C6-T4 spinous process

semispinalis thoracis innervation

posterior primary rami

semispinalis thoracis function

extend vertebral column and rotate it to OPPOSITE side

semispinalis cervicis origin

T1-T6 transverse processes

semispinalis cervicis insertion

C1-C7 spinous process

semispinalis cervicis innervation

posterior primary rami

semispinalis cervicis function

extend vertebral column and rotate it to the OPPOSITE side

semispinalis capitis origin

C7-T7 transverse processes

semispinalis capitis insertion

medial part between superior and inferior nuchal line of occipital bone

semispinalis capitis innervation

posterior primary rami

semispinalis capitis function

extend head and rotate it to OPPOSITE side

mutlifidus origin

posterior superior iliac spine

maxillary process L1-L5

thoracic process T1-T12

articular process C4-C7

multifidus insertion

spinous process of vertebrae of 2-5 levels above

mulitfidus innervation

posterior primary rami

multifidus function

extend vertebral column to rotate to OPPOSITE side