Objectives
Gross Anatomy of Muscle:
Head and Neck
Chapter 6
HEAD & FACIAL MUSCLES
• Frontalis – covers frontal bone; raises
eyebrows & wrinkles forehead
• Temporalis – fan shaped; covers temporal
bone; chewing muscle
• Orbicularis Oculi – circular muscle around the
eye; close, squint, blink & wink eye
• Orbicularis Oris – circular muscle around
mouth; kissing muscle; closes mouth &
protrudes lips
• Occipitalis – covers occipital bone; flexion &
extension of head
1. Name and locate major muscles of the
human body on a torso or diagram.
2. State the action of the major muscles of
the human body
3. State the origin and insertion of the major
muscles of the human body
• Buccinator – runs horizontally across the cheek;
flattens cheek & holds food in place while
chewing
• Zygomaticus – group of muscles that extending
from corner of mouth to cheekbone; raises
corners of mouth upward; smiling muscle
• Masseter – covers the angle of mandible; closes
jaw by elevating mandible
http://www.gwc.maricopa.edu/class/bio201/h
ead/head1.htm
Neck Muscles
• Platysma – single sheet - like muscle
covering anterolateral neck; superficial to
sternocleidomastoid; pulls the corners of
mouth inferior
• Sternocleidomastoid – 2 headed muscle
(sternum & clavicle); heads fuse as they
insert into mastoid process; bend head to
shoulder & bows head
http://www.wisconline.com/Objects/ViewObject.aspx?ID=AP15204
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Origins and Insertions
Origins and Insertions
Muscle
Origin
Insertion
frontalis
cranial
aponeurosis
skin of
eyebrows
orbicularis
oculi
frontal bone
and maxilla
tissue around
eyes
orbicularis
oris
mandible and skin and
maxilla
muscle
around
mouth
Origins and Insertions
Muscle
Origin
Insertion
Muscle
temporalis
temporal
bone
mandible
buccinator
zygomaticus
zygomatic
bone
masseter
temporal
bone
skin and
muscle at
corner of lip
mandible
Origin
maxilla and
mandible
near molars
sternocleido- sternum and
mastoid
clavicle
platysma
Insertion
orbilularis
oris
temporal
bone
(mastoid
process)
CT covering tissue around
of sup. Chest mouth
muscles
Drill & Practice Sites
• http://media.pearsoncmg.com/bc/bc_marieb_ehap_8/acti
vities/index.html
• http://www.wiley.com/college/apcentral/anatomydrill/
• http://www.mhhe.com/biosci/esp/2002_general/Esp/defa
ult.htm
• http://highered.mcgrawhill.com/sites/0072919329/student_view0/chapter9/labeli
ng_exercises.html#
• http://www.wisconline.com/Objects/ViewObject.aspx?ID=AP15204
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