Neck Region MOINA

Deep fascia over pectoralis major and deltoid

Platysma origin

Body of mandible and angle of mouth

Platysma insertion

Facial nerve cervical branch

Platysma nerve

Depresses mandible and angle of mouth

Platysma action

Manubrium sterni and medial third of clavicle

Sternocleidomastoid origin

Mastoid process of temporal bone and occipital bone

Sternocleidomastoid insertion

Spinal part of accessory nerve and C2 and C3

Sternocleidomastoid nerve

Two muscles acting together extend head and flex neck; one muscle rotates head to opposite side

Sternocleidomastoid action

Mastoid process of temporal bone

Digastric (Posterior Belly) origin

Intermediate tendon is held to hyoid by fascial sling

Digastric (Posterior Belly) insertion

Facial nerve

Digastric (Posterior Belly) nerve

Depresses mandible or elevates hyoid bone

Digastric (Posterior Belly) action

Body of mandible

Digastric (Anterior Belly) origin

Intermediate tendon is held to hyoid by fascial sling

Digastric (Anterior Belly) insertion

Nerve to mylohyoid

Digastric (Anterior Belly) nerve

Depresses mandible or elevates hyoid bone

Digastric (Anterior Belly) action

Styloid process

Stylohyoid origin

Body of hyoid bone

Stylohyoid insertion

Facial nerve

Stylohyoid nerve

Elevates hyoid bone

Stylohyoid action

Mylohyoid line of body of mandible

Mylohyoid origin

Body of hyoid bone and fibrous raphe

Mylohyoid insertion

Inferior alveolar nerve

Mylohyoid nerve

Elevates floor of mouth and hyoid bone or depresses mandible

Mylohyoid action

Inferior mental spine of mandible

Geniohyoid origin

Body of hyoid bone

Geniohyoid insertion

First cervical nerve

Geniohyoid nerve

Elevates hyoid bone or depresses mandible

Geniohyoid action

Manubrium sterni and clavicle

Sternohyoid origin

Body of hyoid bone

Sternohyoid insertion

ansa cervicalis c1,2,3

Sternohyoid nerve

depress hyoid bone

Sternohyoid action

Manubrium sterni

Sternothyroid origin

Oblique line on lamina of thyroid cartilage

Sternothyroid insertion

Ansa cervicalis; C1, 2, and 3

Sternothyroid nerve

Depresses larynx

Sternothyroid action

Oblique line on lamina of thyroid cartilage

Thyrohyoid origin

Lower border of body hyoid bone

Thyrohyoid insertion

First cervical nerve

Thyrohyoid nerve

Depresses hyoid bone or elevates larynx

Thyrohyoid action

Upper margin of scapula and suprascapular ligament

Omohyoid (Inferior Belly) origin

Intermediate tendon is held to clavical and first rib by fascial sling

Omohyoid (Inferior Belly) insertion

Ansa cervicalis; C1, 2, and 3

Omohyoid (Inferior Belly) nerve

Depresses hyoid bone

Omohyoid (Inferior Belly) action

Lower border of body of hyoid bone

Omohyoid (Superior belly) origin

Intermediate tendon is held to clavicle and first rip by fascial sling

Omohyoid (Superior belly) insertion

Ansa cervicalis; C1, 2, and 3

Omohyoid (Superior belly) nerve

Depresses hyoid bone

Omohyoid (Superior belly) action

Transcerse processes of third, fourth, fifth, and sixth cervical vertebrae

Scalenus anterior origin

First rib

Scalenus anterior insertion

C4, 5, and 6

Scalenus anterior nerve

Elevates first rib; laterally flexes and rotates cervical part of vertebral colums

Scalenus anterior action

Transverse processes of upper six cervical vertebrae

Scalenus medius origin

First rib

Scalenus medius insertion

Anterior rami of cervical nerves

Scalenus medius nerve

Elevates first rib; laterally flexes and rotates cervical part of vertebral column

Scalenus medius action

Transverse processes of lower cervical vertebrae

Scalenus posterior origin

Second rib

Scalenus posterior insertion

Anterior rami of cervical nerves

Scalenus posterior nerve

Elevates second reib; laterally flexes and rotates cervical part of vertebral column

Scalenus posterior action