Axial Muscles: Origins, Insertions, and Actions Quiz

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What muscle is responsible for elevating and closing the jaw?

Maxilla

Mastoid process

Sphenoid

Temporalis (correct)

What muscle raises the eyebrows and wrinkles the forehead?

Levator Labii Superioris

Orbicularis Oris

Depressor Labii Inferioris

Orbicularis Oculi (correct)

Which muscle depresses the lower lip?

Mentalis (correct)

Orbicularis Oris

Sternocleidomastoid

Levator Labii Superioris

Which muscle elevates the corner of the mouth and draws it laterally?

Zygomaticus major Signup and view all the answers

When contracted, which muscle flattens and increases the vertical dimension of the thoracic cavity for inhalation?

Diaphragm Signup and view all the answers

What muscle compresses and purses the lips?

Orbicularis Oris Signup and view all the answers

What bone/marking does the diaphragm insert into?

Xiphoid process of sternum/costal cartilage Signup and view all the answers

Which muscle elevates the upper lip?

Levator Labii Superioris Signup and view all the answers

Which muscle is responsible for elevating the upper lip?

Zygomaticus minor Signup and view all the answers

Which muscle flexes the neck bilaterally and laterally flexes it unilaterally?

Sternocleidomastoid Signup and view all the answers

Which muscle is involved in elevating the mandible?

Masseter Signup and view all the answers

Where does the Orbicularis Oris muscle insert?

Skin of lower lip Signup and view all the answers

What is the main function of the Internal Intercostals when relaxed?

Increase dimension of the thoracic cavity for inhalation Signup and view all the answers

Where does the Rectus Abdominis muscle insert?

Xiphoid process of sternum Signup and view all the answers

What action do the External Oblique muscles perform when acting together?

Compress abdomen and flex vertebral column Signup and view all the answers

Where does the Transverse Abdominis muscle originate from?

Iliac crest of ilium Signup and view all the answers

What role do the Erector Spinae muscles play when contracting together?

Extend the vertebral column and maintain posture Signup and view all the answers

How do the Internal Oblique muscles act when contracting separately?

Rotate column to same side/lateral flexion Signup and view all the answers