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Anatomy Head and Neck Muscles
Origins, Insertions, Actions and Innervations
172
Anatomy
Undergraduate 3
12/04/2013
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Term
Superior Rectus Origin
(Of The Eye)
 Definition
Tendinous ring attached to optic canal
Term
Superior Rectus Insertion
(Of The Eye)
 Definition
Superior eyeball
Term
Superior Rectus Action
(Of The Eye)
 Definition
Turns eyeball superiorly
Term
Superior Rectus Innervation
(Of The Eye)
 Definition
Oculomotor n
Term
Inferior Rectus Origin
(Of The Eye)
 Definition
Tendinous ring attached to optic nerve
Term
Inferior Rectus Insertion
(Of The Eye)
 Definition
Inferior eyeball
Term
Inferior Rectus Action
(Of The Eye)
 Definition
Turns eyeball in inferiorly
Term
Inferior Rectus Innervation
(Of The Eye)
 Definition
Oculomotor Nerve
Term
Medial Rectus Origin
(Of The Eye)
 Definition
Tendinous ring attached to optic canal
Term
Medial Rectus Insertion
(Of The Eye)
 Definition
Medial eyeball
Term
Medial Rectus Action
(Of The Eye)
 Definition
Turns eyeball medially
Term
Medial Rectus Innervation
(Of The Eye)
 Definition
Oculomotor Nerve
Term
Lateral Rectus Origin
(Of The Eye)
 Definition
Tendinous ring attached to optic canal
Term
Lateral Rectus Insertion
(Of The Eye)
 Definition
Lateral eyeball
Term
Lateral Rectus Action
(Of The Eye)
 Definition
Turns eyeball laterally
Term
Lateral Rectus Innervation
(Of The Eye)
 Definition
Abducens Nerve
Term
Superior Oblique Origin
(Of The Eye)
 Definition
Posterior orbit
Term
Superior Oblique Insertion
(Of The Eye)
 Definition
Superior, posterolateral eyeball
Term
Superior Oblique Action
(Of The Eye)
 Definition
Turns eyeball inferiorly and laterally
Term
Superior Oblique Innervation
(Of The Eye)
 Definition
Trochlear Nerve
Term
Inferior Oblique Origin
(Of The Eye)
 Definition
Anteromedial floor of orbit
Term
Inferior Oblique Insertion
(Of The Eye)
 Definition
Inferior, posterolateral eyeball
Term
Inferior Oblique Action
(Of The Eye)
 Definition
Turns eyeball superiorly and laterally
Term
Inferior Oblique Innervation
(Of The Eye)
 Definition
Oculomotor Nerve
Term
Tensor Tympani Origin
(Of The Ear)
 Definition
Auditory tube
Term
Tensor Tympani Insertion
(Of The Ear)
 Definition
Malleus
Term
Tensor Tympani Action
(Of The Ear)
 Definition
Pulls malleus towards incus
Term
Tensor Tympani Innervation
(Of The Ear)
 Definition
Mandibular Nerve
Term
Stapedius Origin
(Of The Ear)
 Definition
Posterior wall of middle ear
Term
Stapedius Insertion
(Of The Ear)
 Definition
Stapes
Term
Stapedius Action
(Of The Ear)
 Definition
Pulls stapes towards incus
Term
Stapedius Innervation
(Of The Ear)
 Definition
Facial Nerve
Term
Tensor Tympani Arch
 Definition
1
Term
Anterior Belly of the Digastric Origin
 Definition
Inferior margin of mandible near symphysis
Term
Anterior Belly of Digastric Insertion
 Definition
Hyoid bone via connective tissue loop
Term
Anterior Belly of Digastric Action
 Definition
Elevates and steadies hyoid
Term
Anterior Belly of Digastric Innervation
 Definition
Mandibular Nerve
Term
Mylohyoid Origin
 Definition
Medial surface of mandible from symphysis to molar teeth
Term
Mylohyoid Insertion
 Definition
Hyoid bone and midline raphe
Term
Mylohyoid Action
 Definition
Elevates floor of mouth and hyoid
Term
Mylohyoid Innervation
 Definition
Mandibular Nerve
Term
Masseter Origin
 Definition
Inferior border of zygomatic arch
Term
Masseter Insertion
 Definition
Lateral surface of mandible
Term
Masseter Action
 Definition
Elevates mandible
Term
Masseter Innervation
 Definition
Mandibular Nerve
Term
Anterior Belly of the Digastric Arch
 Definition
1
Term
Mylohyoid Arch
 Definition
1
Term
Masseter Arch
 Definition
1
Term
Temporalis Origin
 Definition
Temporal fossa
Term
Temporalis Insertion
 Definition
Coronoid process of mandible
Term
Temporalis Action
 Definition
Elevates mandible
Term
Temporalis Innervation
 Definition
Mandibular Nerve
Term
Lateral Pterygoid Origin
 Definition
Greater wing & pterygoid process of sphenoid
Term
Lateral Pterygoid Insertion
 Definition
Mandibular condyle & tempormandibular joint
Term
Lateral Pterygoid Action
 Definition
Protrudes mandible, side to side movement of mandible
Term
Lateral Pterygoid Innervation
 Definition
Mandibular Nerve
Term
Medial Pterygoid Origin
 Definition
Maxilla, palatine & pterygoid process of sphenoid
Term
Medial Pterygoid Insertion
 Definition
Medial surface of mandible inferior to mandibular foramen
Term
Medial Pterygoid Action
 Definition
Elevates mandible, side to side movement of mandible
Term
Medial Pterygoid Innervation
 Definition
Mandibular Nerve
Term
Temporalis Arch
 Definition
1
Term
Lateral Pterygoid Arch
 Definition
1
Term
Medial Pterygoid Arch
 Definition
1
Term
Stapedius Arch
 Definition
2
Term
Stapedius Origin
 Definition
Posterior wall of middle ear cavity
Term
Stapedius Insertion
 Definition
Stapes
Term
Stapedius Action
 Definition
Pulls stapes towards incus
Term
Stapedius Innervation
 Definition
Facial Nerve
Term
Frontalis Origin
 Definition
Galea aponeurotica
Term
Frontalis Insertion
 Definition
Skin of the eyebrows
Term
Frontalis Action
 Definition
Elevates eyebrows
Term
Frontalis Innervation
 Definition
Facial Nerve
Term
Occipitalis Arch
 Definition
2
Term
Frontalis Origin
 Definition
Occipital bone
Term
Frontalis Insertion
 Definition
Galea aponeurotica
Term
Frontalis Action
 Definition
Pulls scalp posteriorly
Term
Frontalis Innervation
 Definition
Facial Nerve
Term
Orbicularis Oculi Arch
 Definition
2
Term
Orbicularis Oculi Origin
 Definition
Frontal and Maxillary bones
Term
Orbicularis Oculi Insertion
 Definition
Skin around eyes
Term
Orbicularis Oculi Action
 Definition
Closes eyelids
Term
Orbicularis Oculi Innervation
 Definition
Facial Nerve
Term
Orbicularis Oris Arch
 Definition
2
Term
Orbicularis Oris Origin
 Definition
Mandible, maxillae and skin around mouth
Term
Orbicularis Oris Insertion
 Definition
Encircles mouth inserting into the skin of the lips
Term
Orbicularis Oris Action
 Definition
Closes and protrudes lips
Term
Orbicularis Oris Innervation
 Definition
Facial Nerve
Term
Zygomaticus Arch
 Definition
2
Term
Zygomaticus Origin
 Definition
Zygomatic bone
Term
Zygomaticus Insertion
 Definition
Orbicularis oris
Term
Zygomaticus Action
 Definition
Elevates corners of mouth
Term
Zygomaticus Innervation
 Definition
Facial Nerve
Term
Buccinator Arch
 Definition
2
Term
Buccinator Origin
 Definition
External surfaces of mandible and maxilla
Term
Buccinator Insertion
 Definition
Orbicularis Oris
Term
Buccinator Action
 Definition
Compresses cheeks
Term
Buccinator Innervation
 Definition
Facial
Term
Platysma Arch
 Definition
2
Term
Platysma Origin
 Definition
Fascia of superior thorax
Term
Platysma Insertion
 Definition
Inferior lip, corners of mouth and mandible
Term
Platysma Action
 Definition
Depresses mandible and corners of mouth
Term
Platysma Innervation
 Definition
Facial Nerve
Term
Stylohyoid Arch
 Definition
2
Term
Stylohyoid Origin
 Definition
Styloid process
Term
Stylohyoid Insertion
 Definition
Hyoid bone
Term
Stylohyoid Action
 Definition
Elevates and retracts hyoid
Term
Stylohyoid Innervation
 Definition
Facial Nerve
Term
Posterior Belly of the Digastric Arch
 Definition
2
Term
Posterior Belly of the Digastric Origin
 Definition
Mastoid process
Term
Posterior Belly of the Digastric Insertion
 Definition
Hyoid bone via connective tissue loop
Term
Posterior Belly of the Digastric Action
 Definition
Depresses mandible; with anterior digastric elevates & steadies hyoid during swallowing
Term
Posterior Belly of the Digastric Innervation
 Definition
Facial Nerve
Term
Stylopharyngeal Arch
 Definition
3
Term
Stylopharyngeal Origin
 Definition
Styloid process
Term
Stylopharyngeal Insertion
 Definition
Posterior & superior borders of thyroid cartilage
Term
Stylopharyngeal Action
 Definition
Elevates pharynx & larynx during swallowing & speaking
Term
Stylopharyngeal innervation
 Definition
Glossopharyngeal Nerve
Term
Pharyngeal Constrictors Arch
 Definition
4-6
Term
Pharyngeal Constrictors Origin
 Definition
Form muscular walls of pharynx
Term
Pharyngeal Constrictors Insertion
 Definition
Form muscular walls of pharynx
Term
Pharyngeal Constrictors Action
 Definition
Constrict pharynx during swallowing to propel food into esophagus
Term
Pharyngeal Constrictors Innervation
 Definition
Vagus Nerve
Term
Sternocleidomastoid Arch
 Definition
4-6
Term
Sternocleidomastoid Origin
 Definition
Manubrium of sternum and medial clavicle
Term
Sternocleidomastoid Insertion
 Definition
Mastoid process
Term
Sternocleidomastoid Action
 Definition
Bilateral: flexes head and neck
Unilateral: laterally flexes head and neck
Term
Sternocleidomastoid Innervation
 Definition
Accessory Nerve
Term
Trapezius Arch
 Definition
4-6
Term
Trapezius Origin
 Definition
Occipital bone and spinous processes of cervical and thoracic vertebrae
Term
Trapezius Insertion
 Definition
Acromion process, spine of scapula and lateral clavicle
Term
Trapezius Action
 Definition
Superior Fibers: elevates scapula
Middle Fibers: retracts scapula
Inferior Fibers: depresses scapula
Term
Trapezius Innervation
 Definition
Accessory Nerve
Term
Splenius Origin
 Definition
Inferior half of nuchal ligament & spinous processes of T1-6
Term
Splenius Insertion
 Definition
Transverse processes C1-4, mastoid process and posterior skull
Term
Splenius Action
 Definition
Bilateral: extend head and neck
Unilateral: laterally flex head and neck
Term
Splenius Innervation
 Definition
Cervical and Thoracic dorsal rami
Term
Semispinalis Origin
 Definition
Transverse processes of cervical and thoracic vertebrae
Term
Semispinalis Insertion
 Definition
Spinous processes of vertebrae 6-7 segments superior to origin, back of skull near midline
Term
Semispinalis Action
 Definition
Bilateral: extend head and neck
Unilateral: laterally flex head and neck
Term
Semispinalis Innervation
 Definition
Cervical and Thoracic dorsal rami
Term
Sternothyroid origin
 Definition
Posterior Manubrium
Term
Sternothyroid Insertion
 Definition
Thyroid cartilage
Term
Sternothyroid Action
 Definition
Depresses thyroid cartilage
Term
Sternothyroid Innervation
 Definition
Cervical ventral rami
Term
Thyrohyoid Origin
 Definition
Thyroid cartilage
Term
Thyrohyoid Insertion
 Definition
Hyoid
Term
Thyrohyoid Action
 Definition
Depresses Hyoid
Term
Thyrohyoid Innervation
 Definition
Cervical ventral rami
Term
Sternohyoid Origin
 Definition
Posterior manubrium
Term
Sternohyoid Insertion
 Definition
Hyoid
Term
Sternohyoid Action
 Definition
Depresses Hyoid
Term
Sternohyoid Innervation
 Definition
Cervical ventral rami
Term
Omohyoid Origin
 Definition
Superior scapula
Term
Omohyoid Insertion
 Definition
Hyoid
Term
Omohyoid Action
 Definition
Depresses hyoid
Term
Omohyoid Innervation
 Definition
Cervical ventral rami
Term
Anterior Scalene Origin
 Definition
Transverse processes of C3-C7
Term
Anterior Scalene Insertion
 Definition
Rib 1
Term
Anterior Scalene Action
 Definition
Elevates first rib; lateral flexion of neck
Term
Anterior Scalene Innervation
 Definition
Cervical ventral rami
Term
Middle Scalene Origin
 Definition
Transverse processes of C2-C7
Term
Middle Scalene Insertion
 Definition
Ribs 1&2
Term
Middle Scalene Action
 Definition
Elevates first two ribs; lateral flexion of neck
Term
Middle Scalene Innervation
 Definition
Cervical ventral rami
Term
Posterior Scalene Origin
 Definition
Transverse processes of C4-C6
Term
Posterior Scalene Insertion
 Definition
Ribs 2&3
Term
Posterior Scalene Action
 Definition
Elevates ribs 2&3; lateral flexion of neck
Term
Posterior Scalene Innervation
 Definition
Cervical ventral rami
Term
Lavator Scapulae Origin
 Definition
Transverse processes of C1- C4
Term
Lavator Scapulae Insertion
 Definition
Medial border of scapula
Term
Lavator Scapulae Action
 Definition
Elevates scapula
Term
Lavator Scapulae Innervation
 Definition
Brachial Plexus
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