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Sternocleidomastoid origin

O - manubrium of sternum, medial clavicle

Sternocleidomastoid insertion

I- mastoid process of the temporal bone

Sternocleidomastoid action

A- flexes head, rotates head laterally

Scalene origin

O - transverse processes of the cervical vertebrae

Scalene insertion

I- anterior surface of ribs 1-2

Scalene action

A - elevates ribs 1-2, flexes neck, rotates neck

Trapezius origin

O- occipital bone, spinous process of C7-TI2

Trapezius insertion

I- lateral 1/3 of clavicle, spine of scapula, acromion process of scapula

Trapezius nerve supply

N- motor: spinal part of accessory nerve; sensory: C3 & C4

Trapezius action

A- elevates, depresses, rotates, adducts scapula

Latissimus Dorsi origin

O- spinous process of T7 - T12, ribs 9 - 12, iliac crest, inferior angle of scapula

Latissimus Dorsi insertion

I- floor of bicipital groove of humerus

Latissimus Dorsi nerve supply

N - thoracodorsal nerve

Latissimus Dorsi action

A- extends , adducts, internal rotate arm

Levator scapulae origin

O - transverse process of C1-C4

Levator scapula insertion

I- medial border of scapula

Levator scapula nerve supply

N - C3 & 4 dorsal scapular nerve

Levator scapula action

A - elevates, downwardly rotates scapula

Rhomboid minor origin

O- ligament nucha spinous processes of C7 -T1

Rhomboid minor insertion

I - medial border of scapula

Rhomboid minor nerve supply

N - dorsal scapular nerve

Rhomboid minor action

A- adducts, downwardly rotates scapula

Rhomboid major origin

O- ligament nucha, spinous process of T2 - T5

Rhomboid major insertion

I - medial border of scapula

Rhomboid Major nerve supply

N- dorsal scapular nerve

Rhomboid Major action

A - adducts, downwardly rotates scapula

Iliocostalis origin

0- iliac crest, ribs 3-12

Iliocostalis insertion.

I- inferior border of ribs

Iliacostalis action

A- extends vertebral column, laterally flexes vertebral column

Longissimus origin

O- transverse process of C4 - L5

Longissimus insertion

I- mastoid process of temporal bone

Longissimus action

A- extends vertebral column, laterally flexes vertebral column

Spinalis origin

O- spinous processes of T7-L3

Spinalis insertion

I-spinous process of C4 - T6

Spinalis action

A - extends vertebral column

Sptenius capitis origin

O- spinous processes of C6 - T7

Splenius capitis insertion

I - mastoid process of temporal bone, occipital bone

Splenius capitis action

A - extends or hyperextends vertebral column

Semispinalis capitis origin

O - transverse processes of C7 - T12

Semispinalis capitis insertion

I- occipital bone

Semispinalis capitis action

A- extends vertebral column

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Sternocleidomastoid

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Scalene

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Trapezius

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Latissimus dorsi

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Levator scapula

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Rhomboid major

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Rhomboid minor

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Iliocostalis

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Longissimus

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Spinalis

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Splenius capitis

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Semispinalis capitis