Which muscle is responsible for raising the eyebrows and wrinkling the forehead?
The Occipitofrontalis
What are the origin and insertion points of the Occipitofrontalis?
Origin is the skull tendon sheath; insertion is the skin of eyebrows and nose
Which muscle is responsible for blinking and squinting?
The Orbicularis oculi.
What is the action of the Orbicularis oris?
It closes the lips and is used for whistling
Which facial muscle originates on the maxilla and mandible and inserts on the Orbicularis oris muscle?
The Buccinator
What is the action of the Buccinator?
Sucking
What is the general origin for the muscles of the Eyeball group?
The annular ring, a tendon ring around the optic nerve
Which muscle allows you to look up?
The Superior rectus.
Which muscle is responsible for looking to the midline (adduction)?
The Medial rectus.
Which muscle is responsible for looking to the lateral side (abduction)?
The Lateral rectus
What is the action of the superior and inferior obliques?
Combined movements
Which chewing muscle elevates the mandible to close the jaw (masticate)?
The Masseter
What are the action and insertion of the Temporalis?
Action is to elevate and retract the mandible; insertion is the mandible coronoid process
Which muscle originates on the pterygoid plate of the sphenoid bone and protrudes the mandible?
The Pterygoid
Which tongue muscle is responsible for protruding the tongue?
The Genioglossus.
Which muscle originates on the manubrium of the sternum and medial surface of the clavicle, and causes head flexion and rotation?
The Sternocleidomastoid
Name two posterior neck muscles whose actions are head extension and rotation.
Splenius capitis and Semispinalis capitis.
Where does the Semispinalis capitis insert?
The occipital bone
Name the three muscles of the Erector Spinae group (vertical extensors of the vertebral column).
Iliocostalis, Longissimus, and Spinalis.
Which abdominal muscle compresses the abdomen?
The Transverse abdominis
The Rectus abdominis originates on the pubic crest/symphysis and inserts on what structures?
The xiphoid process and costal cartilage of ribs 5-7.
Which muscle causes vertebral column extension and lateral flexion, originating on the iliac crest and lumbar fascia?
The Quadratus lumborum.
Which muscle acts in both vertebral lateral flexion and thigh flexion?
The Psoas major.
What is the common action of the External oblique and Internal oblique?
Abdominal flexion and rotation
