Triangularis
Position
-Corner of the lower lip,
extends over the chin
Action
-Pulls the corners of the
chin down
Expression
Temporalis
Position
- Runs down the side of
the face towards the
upper jaw
Action
- Aids raising and
lowering the jaw when...
Frontalis
Position
- Upper part of the
cranium-forehead
Action
- Moves the scalp
forward and raises
eyebrows - surprise
Ex...
Zygomaticus
Position
- Runs down the cheek
towards the corner of the
mouth
Action
Pulls the corner of the
mouth upwards an...
Corrugator
Position
Medial end of the
eyebrow
Action
Draws the eyebrows
down and together as in
frowning
Expression
Orbicularis occuli
Position
Sphincter muscle
surrounding the eye
orbit.
Action
Open and close the eye
as in winking and
bl...
Orbicularis Oris
Position
A sphincter muscle
surrounding the mouth
Action
Closes and opens the
mouth
Expression
Buccinator
Position
Run through the angle of
the cheek to the corners
of the mouth
Action
Compresses food in the
cheeks wh...
Risorius
Position
Corners of the mouth
above the Buccinator
muscle
Action
Pulls the corner of the
mouth upwards and
sidewa...
Masseter
Position
Run down the face to the
angle of the jaw
Action
Lifts, lowers and closes
the jaw aiding
mastication by ...
Depressor labii inferiore
Position
Underside of the lower
lip, either side of the
mentalis muscle
Action
To depress the lo...
Platysma
Position
Front and side of the
neck, down to the
clavicle
Action
Depresses lower jaw and
lip wrinkling skin tissu...
Mentalis
Position
Attached to the lower
jaw and the lower lip at
the point of the chin
Action
Lifts and wrinkles the
chin ...
Nasalis
Position
Over the front of the
nose
Action
Compresses and dilates
the nostril openings
causing wrinkling
Expression
Procerus
Position
Top of the nose between
the eyebrows
Action
Depresses the eyebrows
and forms wrinkles over
the bridge of...
Quadratus labii Superiore
Position
Runs upwards from
upper lip in four separate
groups
Action
Lifts the upper lip and
help...
Sternocleido Mastoid
Position
Either side of the neck to
sternum and clavicle
Action
Individually rotates the
head to one ...
Pectoralis major
Position
Front of the chest, under the breast.
Action
Pulls the arm forward and assists with
rotation
Deltoid
Position
Caps the shoulder
Action
Raises the arm to the side,
Pulls it back and forward again
Occipitalis
Position
At the back of the skull
Action
Helps with movement of the head
Trapezius
Position
Upper back and sides of neck
Action
Rotation of shoulders, draws back
scapula ie, braces shoulders, pul...
Facial muscles
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Facial muscles

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Position and action of muscles of the head and neck

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Facial muscles

  1. 1. Triangularis Position -Corner of the lower lip, extends over the chin Action -Pulls the corners of the chin down Expression
  2. 2. Temporalis Position - Runs down the side of the face towards the upper jaw Action - Aids raising and lowering the jaw when chewing
  3. 3. Frontalis Position - Upper part of the cranium-forehead Action - Moves the scalp forward and raises eyebrows - surprise Expression
  4. 4. Zygomaticus Position - Runs down the cheek towards the corner of the mouth Action Pulls the corner of the mouth upwards and sideways as in smiling Expression
  5. 5. Corrugator Position Medial end of the eyebrow Action Draws the eyebrows down and together as in frowning Expression
  6. 6. Orbicularis occuli Position Sphincter muscle surrounding the eye orbit. Action Open and close the eye as in winking and blinking Expression
  7. 7. Orbicularis Oris Position A sphincter muscle surrounding the mouth Action Closes and opens the mouth Expression
  8. 8. Buccinator Position Run through the angle of the cheek to the corners of the mouth Action Compresses food in the cheeks when eating and allows the blowing action Expression
  9. 9. Risorius Position Corners of the mouth above the Buccinator muscle Action Pulls the corner of the mouth upwards and sideways as in grinning Expression
  10. 10. Masseter Position Run down the face to the angle of the jaw Action Lifts, lowers and closes the jaw aiding mastication by exerting pressure on teeth Expression
  11. 11. Depressor labii inferiore Position Underside of the lower lip, either side of the mentalis muscle Action To depress the lower lip Expression
  12. 12. Platysma Position Front and side of the neck, down to the clavicle Action Depresses lower jaw and lip wrinkling skin tissue on neck
  13. 13. Mentalis Position Attached to the lower jaw and the lower lip at the point of the chin Action Lifts and wrinkles the chin turns lower lip outwards as in pouting Expression
  14. 14. Nasalis Position Over the front of the nose Action Compresses and dilates the nostril openings causing wrinkling Expression
  15. 15. Procerus Position Top of the nose between the eyebrows Action Depresses the eyebrows and forms wrinkles over the bridge of the nose
  16. 16. Quadratus labii Superiore Position Runs upwards from upper lip in four separate groups Action Lifts the upper lip and helps open the mouth
  17. 17. Sternocleido Mastoid Position Either side of the neck to sternum and clavicle Action Individually rotates the head to one side, pulls head down to shoulder and together pulls the chin onto the chest
  18. 18. Pectoralis major Position Front of the chest, under the breast. Action Pulls the arm forward and assists with rotation
  19. 19. Deltoid Position Caps the shoulder Action Raises the arm to the side, Pulls it back and forward again
  20. 20. Occipitalis Position At the back of the skull Action Helps with movement of the head
  21. 21. Trapezius Position Upper back and sides of neck Action Rotation of shoulders, draws back scapula ie, braces shoulders, pull head back

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