TEMPORALIS  

A:Unilaterally: Laterally flex the head and neck to the same side Rotate the head and neck to the opposite side Bilaterally: Flex the neck Assist to elevate the rib cage during inhalation

I: Sternal head:Top of manubrium Clavicular head:Medial one-third of the clavicle

O: Mastoid process of temporal bone and the lateral portion of superior nuchal line of occiput

Sternocleidomastoid

A: Unilaterally: Laterally flex the head and neck to the same side Rotate the head and neck to the opposite side Bilaterally: Flex the neck Assist to elevate the rib cage during inhalation

I: Sternal head:Top of manubrium Clavicular head:Medial one-third of the clavicle

O: Mastoid process of temporal bone and the lateral portion of superior nuchal line of occiput

Scalenes

A: With the ribs fixed, laterally flex the head and neck to the same side (all) Rotate head and neck to the opposite side (all) Bilaterally: Elevate the ribs during inhalation (all) Flex the head and neck (anterior)

O: Transverse processes of third through sixth cervical vertebrae (anterior tubercles)

Transverse processes of second through seventh cervical vertebrae (posterior tubercles)

Transverse processes of sixth and seventh cervical vertebrae (posterior tubercles

I: First rib, Second rib

Masseter

A: Elevate the mandible (temporomandibular joint) May assist to protract the mandible (TM joint)

O: Zygomatic arch

I: Angle and ramus of mandible 

Suprahyoids and Digastric

A: Elevate hyoid and tongue Depress mandible (temporomandibular joint)

O: Geniohyoid, mylohyoid: Underside of mandible Stylohyoid: Styloid process

I: Hyoid bone

Infrahyoids

A: Depress the hyoid bone and thyroid cartilage 

O: Sternohyoid and sternothyroid: Top of manubrium Thyrohyoid: Thyroid cartilage Omohyoid: Superior border of the scapula

I: Sternohyoid, thyrohyoid, and omohyoid: Hyoid bone Sternothyroid: Thyroid cartilage

Platysma

A: Assist to depress the mandible (temporomandibular joint) Tighten the fascia of the neck Draw down corner of the mouth

O: Fascia covering superior part of pectoralis major

I: Base of mandible, skin of lower part of face 

Occipitofrontalis 

Frontalis: Raise the eyebrows and wrinkle the forehead Occipitalis: Anchor and retract the galea posteriorly

Both: Galea aponeurotica

Frontalis: Skin superior to eyebrows Occipitalis: Superior nuchal line of the occiput

Medial Pterygoids

A:Unilaterally:Laterally deviate the mandible to the opposite side Bilaterally: Elevate the mandible; Protract the mandible

O: Medial surface of lateral pterygoid plate of sphenoid bone and tuberosity of maxilla

I: Medial surface of ramus of the mandible

 Lateral Pterygoids

A: Unilaterally: Laterally deviate the mandible to the opposite side Bilaterally: Protract the mandible

O: Superior head: Infratemporal surface and crest of greater wing of sphenoid bone Inferior head: Lateral surface of lateral pterygoid plate of sphenoid bone.

I: Articular disc and capsule of temporomandibular joint, neck of mandible

Longus Capitis

A: Unilaterally: Laterally flex the head and neck to the same side Rotate the head and neck to the same side Bilaterally: Flex the head and neck 

O: Transverse processes of C-3 through C-6

I: Inferior surface of occiput

Longus Colli

A: Unilaterally: Laterally flex the head and neck to the same side Rotate the head and neck to the same side Bilaterally: Flex the head and neck

O: Bodies of C-5 through T-3, transverse processes of C-3 through C-5 

I: Tubercle on anterior arch of the atlas; bodies of the axis, C-3, and C-4; transverse processes of C-5 and C-6