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Head & Neck Muscles
Origins, Insertions, Innervations, and Actions
19
Anatomy
Graduate
07/25/2008

Additional Anatomy Flashcards

 


 

Cards

Term
Platysma M.
Definition

Origin: Skin & fascia overlying pectoralis major and deltoid

 

Insertion: Inferior Border of Mandible and Skin of Lower Face

 

Innervation: Facial (VII)

 

Action: Tenses skin of neck  

Term
Sternocleidomastoid M.
Definition

Origin: Sternal Head=Manubrium

Clavicular Head=Medial 1/3 of Clavicle

 

Insertion: Mastoid Process of Temporal Bone

Lateral 1/2 of Superior Nuchal Line of Occipital Bone

 

Innervation: Accessory (XI)

 

Action: Unilateral side neck Abduction to same side and rotation toward opposite side

Bilateral Flexion of Head

*Accessory Respiratory Muscle 

Term
Digastric M.
Definition

Origin: Anterior Belly=Digastric Fossa of Mandible

Posterior Belly=Mastoid Process of Temporal Bone

 

Insertion: Intermediate Tendon connected to Hyoid Bone

 

Innervation: Anterior Belly=Branch of V3

Posterior Belly=Facial (VII)

 

Action: Elevates Hyoid during Swallowing 

Term
Stylohyoid M.
Definition

Origin: Styloid Process of Temporal Bone

 

Insertion: Hyoid

 

Innervation: Facial (VII)

 

Action: Elevate and Retract Hyoid Bone during swallowing 

Term
Mylohyoid M.
Definition

Origin: Mylohyoid Line of Mandible

 

Insertion: Hyoid

 

Innervation: Branch of V3

 

Action: Elevate Hyoid during swallowing 

Term
Glenohyoid M.
Definition

Origin: Inferior Mental Spine of Mandible

(beneath Mylohyoid, fibers go vertically)

 

Insertion: Hyoid

 

Innervation: C1

 

Action: Pulls Hyoid antero-superiorally during swallowing 

Term
Sternohyoid M.
Definition

Origin: Posterior Surface of Manubrium of Sternum and Medial End of Clavicle 

 

Insertion: Hyoid

 

Innervation: Ana Cervicalis

 

Action: Depresses Hyoid after it has been elvated during swallowing 

Term
Sternothyroid M.
Definition

Origin: Manubrium and First Costal Cartilage

 

Insertion: Oblique Line of Thyroid Cartilage

 

Innervation: Ana Cervicalis

 

Action: Depresses Thyroid Cartilage after it has been elevated during swallowing 

Term
Thyrohyoid M.
Definition

Origin: Oblique Line of Thyroid Cartilage

 

Insertion: Hyoid

 

Innervation: C1

 

Action: Depresses Hyoid and Elevates Thyroid 

Term
Omohyoid M.
Definition

Origin: Inferior Belly=Upper Border of Scapula

Superior Belly=Intermediate Tendon

 

Insertion: Inferior Belly=Intermediate Tendon

 Superior Belly=Body of Hyoid

 

Innervation: Ana Cervicalis

 

Action: Depresses and Retracts Hyoid during swallowing 

Term
Longus Colli M.
Definition

Origin: Vertebrae

 

Insertion: Vertebrae including Anterior Tublercle of Atlas

 

Innervation: Ventral Rami of Cervical N.

 

Action: Neck Flexion 

Term
Longus Capitis M.
Definition

Origin: Transverse Processes of Middle Cervical Vertebrae

 

Insertion: Inferior Surface of Basilar Part of Occipital Bone

 

Innervation: Ventral Rami of Cervical N.

 

Action: Head Flexion 

Term
Anterior Scalene M.
Definition

Origin: Anterior Tubercle of Transverse Processes of Cervical Vertebrae

 

Insertion: First Rib Anteriorly

 

Innervation: Ventral Rami of Cervial N.

 

Action: Flexion of Neck, Side Bending to same side, and Rotation toward opposite side

 

*Accessory Respitory Muscle 

Term
Middle Scalene M.
Definition

Origin: Posterior Tubercle of Transverse Processes of Cervical Vertebrae

 

Insertion: Posterior Part of First Rib

 

Innervation: Ventral Rami of Cervical N.

 

Action:  Side Bending of Neck and Rotation to Opposite Side

 

*Accessory Respiratory Muscle 

Term
Posterior Scalene M.
Definition

Origin: Posterior Tubercle of Transverse Processes of Cervical Vertebrae

 

Insertion: Second Rib

 

Innervation: Ventral Rami of Cervical N.

 

Action: Side Bending of Neck to same side

 

*Accessory Respiratory Muscle 

Term
Temporalis M.
Definition

Origin: Temporal Fossa

 

Insertion: Coronoid Process and Anterior Border of Ramus of Mandible

 

Innervation: Mandibular (V3)

 

Action: Elevation and Retraction of Mandible 

Term
Masseter M.
Definition

Origin: Inferior Margin of Zygomatic Arch

 

Insertion: Lateral Surface of Ramus and Coronoid Process of Mandible

 

Innervation: Mandibular (V3)

 

Action: Elevation and some Protraction of Mandible 

Term
Lateral Pterygoid M.
Definition

Origin: Infratemporal Surface of Greater Wing of Sphenoid Bone and Lateral Surface of Lateral Pterygoid Plate

 

Insertion:  Pterygoid Fossa, Articular Disc, and Capsule of TM Joint

 

Innervation: Mandibular (V3)

 

Action: Protraction, Depression, and Lateral Movement of Mandible to opposite side 

Term
Medial Pterygoid M.
Definition

Origin: Medial Surface of Lateral Pterygoid Plate and Tuberosity of Maxilla

 

Insertion: Medial Surface of Mandible near Angle

 

Innervation: Mandibular (V3)

 

Action: Protraction, Elevation, and Lateral Movement of Mandible to opposite side 

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