neck OIAN

stylohyoid origin

stylohyoid origin

styloid process

stylohyoid insertion

hyoid bone

stylohyoid innervation

cervical branch, facial nerve, CN VII

stylohyoid action

elevates and retracts hyoid, elongating floor of mouth during swallowing

digastric origin

posterior belly - mastoid notch of temporal bone; anterior belly - digastric fossa on mandible

digastric insertion

hyoid bone through fibrous, tendinous loop

digastric innervation

posterior belly - cervical branch of facial nerve, CN VII; anterior belly, mandibular nerve (V3)

digastric action

elevates and steadies hyoid bone during swallowing and speech; if hyoid is fixed, helps depress the mandible and open the mouth

mylohyoid origin

mylohyoid line of the mandible

mylohyoid insertion

hyoid bone and median raphe

mylohyoid innervation

mandibular nerve (V3)

mylohyoid action

elevates the hyoid bone and floor of mouth; together with opposite side, forms floor of mouth

geniohyoid origin

mental spine on mandible

geniohyoid insertion

hyoid bone

geniohyoid innervation

C1 spinal nerve

geniohyoid action

pulls hyoid superior and anterior, shortening floor of the mouth; pulls mandible downwards and inwards when hyoid bone is fixed

omohyoid origin

inferior belly - superior border of scapula; superior belly - tendon of inferior belly near sternocleidomastoid

omohyoid insertion

inferior belly - ends as tendon held to clavicle by central tendon; superior belly - hyoid bone

omohyoid innervation

ansa cervicalis (C1-C3)

omohyoid action

depresses and retracts hyoid bone

sternothyroid origin

manubrium of sternum

sternothyroid insertion

thyroid cartilage

sternothyroid innervation

ansa cervicalis (C1-C3)

sternothyroid action

depresses larynx

thyrohyoid origin

thyroid cartilage

thyrohyoid insertion

hyoid bone

thyrohyoid innervation

C1

thyrohyoid action

depresses hyoid; elevates larynx if hyoid is fixed

sternohyoid origin

manubrium of sternum; posterior to sternoclavicular joint

sternohyoid insertion

hyoid bone

sternohyoid innervation

ansa cervicalis (C1-C3)

sternohyoid action

depresses hyoid bone after swallowing

sternocleidomastoid origin

sternal head - manubrium of sternum; calvicular head - medial third of clavicle

sternocleidomastoid insertion

mastoid process of temporal bone; lateral half of superior nuchal line

sternocleidomastoid innervation

accessory nerve, CN XI

sternocleidomastoid action

unilateral contraction: lateral flexion to same side, rotation to opposite side; bilateral contraction: neck flexion; with head fixed, assists with elevation of thorax during forced inspiration

longus capitis origin

longus capitis insertion

longus capitis innervation

longus capitis action

longus coli origin

longus coli insertion

longus coli innervation

longus coli action

rectus capitis anterior origin

rectus capitis anterior insertion

rectus capitis anterior innervation

rectus capitis anterior action

rectus capitis lateralis origin

rectus capitis lateralis insertion

rectus capitis lateralis innervation

rectus capitis lateralis action

anterior scalene origin

anterior scalene insertion

anterior scalene innervation

anterior scalene action

middle scalene origin

middle scalene insertion

middle scalene innervation

middle scalene action

posterior scalene origin

posterior scalene insertion

posterior scalene innervation

posterior scalene action

rectus capitis posterior major origin

rectus capitis posterior major insertion

rectus capitus posterior major innervation

rectus capitus posterior major action

rectus capitus posterior minor origin

rectus capitus posterior minor insertion

rectus capitus posterior minor innervation

rectus capitus posterior minor action

oblqiuus capitis inferior origin

oblqiuus capitus inferior insertion

oblqiuus capitus inferior innervation

obliquus capitus inferior action

obliquus capitus superior origin

obliquus capitus superior insertion

obliquus capitus superior innervation

obliquus capitus superior action