Facial and skeletal muscles.txt

• 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 in inhalation

o-sternal head- top of manubrium, clavicular head- medial one-third of the clavicle

i- mastoid process of temporal bone and the lateral portion of superior nuchal line of occiput

0- transverse procceses of third through sixth cervical vertebrae

i- first rib

o- transverse processes of second through seventh cervical vertebrae

i- first rib

o- transverse processes of fifth and sicth cervical vertebrae

i- second rib

• a- elevate the mandible
• 0- zygomatic arch
• i- angle and ramus of mandible

unilaterally- with the ribs fixed, laterally flex the head and neck to the same side, rotate head and neck to the opposite side

bilaterally- elevate the ribs during inhalation, flex the head and neck

• a- elevate the mandible, retract the mandible
• o- temporal fossa and fascia
• i- coronoid process of the mandible

• a0 elevate hyoid and tongue, depress mandible
• o- geniohyoid, mylohyoid- underside of mandible
• stylohyoid- styloid process

i- hyoid bone

• a- depresses the mandible with hyoid bone fixed,,,, it elevates the hyoid bone, retracts the mandible
• o- mastoid process
• i- inferior border of the mandible

• a- depress the hyoid bone and thyroid cartilage
• o-sternohyoid- top of manubrium, thyrohyoid= throid cartilage, omohyoid- superior border of the scapula
• i- sternohyoid, omohyoid, and thyrohyoid- hyoid bone, sternothyroid- thyroid cartilage

• a- assist in depression of the mandible, tighten the fascia
• o- fascia covering superior part of pectoralis major
• i- base of mandible, skin of lower part of face

• a- frontalis raise the eyebrows and wrinkle the forehead, occipitalis- anchor and retract the galea posteriorly
• o- ask askas aks

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

• a- unilaterally- laterally deviate the mandible to the opposite side
• bilaterally- protract the mandible

• o-superior head- infratemproal surface and crest of greater wing of sphenoid bone
• inferior head 0 lateral surface of lateral pterygoid plate of sphenoid bone
• i- articular disc and capsule of temporomandiblar joint, neck of mandible