Muscles Of The Neck

Front 1

Platysma: Superior Attachment

Back 1

Mandible - Lower Border
Lower Face - Skin and Subcutaneous Tissue

Front 2

Platysma: Inferior Attachment

Back 2

Fascia Covering Superior Parts of Pectoralis Major and Deltoid Muscles

Front 3

Platysma: Innervation

Back 3

Cervical Branch of Facial Nerve

Front 4

Platysma: Action

Back 4

Draws corners of mouth inferiorly and widens it
Draws skin of the neck superiorly when teeth are clenched

Front 5

Sternocleidomastoid: Superior Attachment

Back 5

Temporal Bone - Lateral Surface of Mastoid Process
Occiput - Lateral 1/2 of Superior Nuchal Line

Front 6

Sternocleidomastoid: Inferior Attachment

Back 6

Clavicle - Superior Surface of Medial 1/3
Sternum - Anterior Surface of Manubrium

Front 7

Sternocleidomastoid: Innervation

Back 7

Spinal Accessory Nerve - CN XI

Front 8

Sternocleidomastoid: Action

Back 8

Unilateral: Head ipsilateral flexion with contralateral rotation
Bilateral: Head Flexion

Front 9

Mylohyoid: Innervation

Back 9

Mylohyoid Nerve - Branch of Inferior Alveolar Nerve of CN V3 - Trigeminal Nerve, Mandibular Division

Front 10

Mylohyoid: Action

Back 10

Elevates hyoid bone, floor of mouth and tongue during speaking and swallowing

Front 11

Geniohyoid: Innervation

Back 11

C1 via CN XII - Hypoglossal Nerve

Front 12

Geniohyoid: Action

Back 12

Pulls Hyoid Bone Anterosuperiorly
Shortens Floor of Mouth
Widens Pharynx

Front 13

Stylohyoid: Innervation

Back 13

Stylohyoid Branch of CN VII - Facial Nerve

Front 14

Stylohyoid: Action

Back 14

Elevates & Retracts Hyoid Bone Thereby Elongating Floor of Mouth

Front 15

Digastric: Innervation

Back 15

Anterior Belly: Mylohyoid Nerve - Branch of Inferior Alveolar Nerve of CN V3 - Trigeminal Nerve, Mandibular Division
Posterior Belly: Digastric Branch of CN VII - Facial Nerve

Front 16

Digastric: Action

Back 16

Depresses Mandible
Raises Hyoid Bone & Steadies It During Swallowing and Speaking

Front 17

Sternohyoid: Innervation

Back 17

C1-C3 via a Branch of Ansa Cervicalis

Front 18

Sternohyoid: Action

Back 18

Depresses Hyoid Bone After It Has Been Elevated During Swallowing

Front 19

Omohyoid: Innervation

Back 19

C1-C3 via a Branch of Ansa Cervicalis

Front 20

Omohyoid: Action

Back 20

Depresses, Retracts, & Steadies Hyoid Bone

Front 21

Sternothyroid: Innervation

Back 21

C2-C3 via a Branch of Ansa Cervicalis

Front 22

Sternothyroid: Action

Back 22

Depresses Hyoid Bone and Larynx

Front 23

Thyrohyoid: Innervation

Back 23

C1 via CN XII - Hypoglossal Nerve

Front 24

Thyrohyoid: Action

Back 24

Depresses Hyoid Bone
Elevates Larynx

Front 25

Longus Colli: Innervation

Back 25

Ventral Rami of C2-C6 Spinal Nerves

Front 26

Longus Colli: Action

Back 26

Unilateral: Neck Flexion w/Rotation to Opposite Side
Bilateral: Neck Flexion

Front 27

Longus Capitis: Innervation

Back 27

Ventral Rami of C1-C3 Spinal Nerves

Front 28

Longus Capitis: Action

Back 28

Unilateral: Head Lateral Flexion
Bilateral: Head Flexion

Front 29

Rectus Capitis Anterior: Innervation

Back 29

Branches from Loop Between C1 and C2 Spinal Nerves

Front 30

Rectus Capitis Anterior: Action

Back 30

Unilateral: Head Lateral Flexion
Bilateral: Head Flexion

Front 31

Rectus Capitis Lateralis: Innervation

Back 31

Branches from Loop Between C1 and C2 Spinal Nerves

Front 32

Rectus Capitis Lateralis: Action

Back 32

Unilateral: Head Lateral Flexion
Bilateral: Head Flexion, Helps to Stabilize Head

Front 33

Posterior Scalene: Innervation

Back 33

Ventral Rami of C7 & C8 Spinal Nerves

Front 34

Posterior Scalene: Action

Back 34

Unilateral: Neck Lateral Flexion
Bilateral: Neck Flexion
Elevates 2nd Rib During Forced Inhalation

Front 35

Middle Scalene: Innervation

Back 35

Ventral Rami of Cervical Spinal Nerves

Front 36

Middle Scalene: Action

Back 36

Unilateral: Neck Lateral Flexion
Bilateral: Neck Flexion
Elevates 1st Rib During Forced Inhalation

Front 37

Anterior Scalene: Innervation

Back 37

Ventral Rami of C4-C6 Spinal Nerves

Front 38

Anterior Scalene: Action

Back 38

Unilateral: Neck Ipsilateral Flexion W/Contralateral Rotation
Bilateral: Neck Flexion
Elevates 1st Rib During Forced Inhalation

Front 39

Temporal: Action

Back 39

Elevation and Retraction of Mandible

Front 40

Masseter: Action

Back 40

Elevation of Mandible

Front 41

Lateral Pterygoid: Action

Back 41

Unilateral: Produce Side-To-Side Movements of The Mandible
Bilateral: Depresses and Protrudes the Mandible

Front 42

Medial Pterygoid: Action

Back 42

Unilateral: Produce Side-To-Side Movements of the Mandible
Bilateral: Elevation of the Mandible

Front 43

Genioglossus: Action

Back 43

Depresses Base of Tongue and Protrudes Tongue

Front 44

Hyoglossus: Action

Back 44

Depresses Base of Tongue and Retracts Tongue

Front 45

Styloglossus: Action

Back 45

Elevates Base of Tongue and Retracts Tongue