Muscles of the Eye and Eyebrow

The video tutorial explores the anatomy of the human head, neck, and shoulder muscles, using a watercolor sketch overlay. It details the muscles around the eyes and forehead, explaining their roles in facial expressions like anger and surprise. The frontalis muscle's function in eyebrow movement is highlighted. The mechanics of the human eye are compared to a camera, with a focus on the muscles that adjust focus. The orbicularis oculi muscle's role in eyelid movement and eye closure is also discussed.

What is the purpose of using a red pencil in the video?

• To highlight the muscles

• To draw the bones

• To color the background

• To write notes

Which muscles are responsible for bringing the eyebrows closer together?

• Neck muscles

• Muscles in the inner corners of the eyes

• Orbicularis oculi

• Frontalis

What expression is formed by the contraction of the muscles near the eyebrows?

• Sadness

• Happiness

• Surprise

• Anger

What is the function of the frontalis muscle?

• To close the eyelids

• To elevate the eyebrows

• To move the jaw

• To rotate the neck

How does the human eye adjust focus?

• By moving the eyeball

• By changing the size of the pupil

• By changing the shape of the lens

• By adjusting the distance between the lens and the retina

What is the role of the cross-shaped muscles inside the eye socket?

• To protect the eye from dust

• To produce tears

• To change the eye color

• To grip the eyeball and adjust focus

Which muscle surrounds the eyeball and is involved in blinking?

• Orbicularis oculi

• Jaw muscles

• Neck muscles

• Frontalis

What is the function of the orbicularis oculi muscle?

• To rotate the head

• To move the ears

• To close the eyelids

• To open the mouth

What happens when the larger portion of the orbicularis oculi contracts?

• The eye opens wide

• The eye shuts tightly

• The nose wrinkles

• The mouth smiles

What is the motion called when the eyelid gently closes and opens?

• Blinking

• Winking

• Peeking

• Squinting