Platysma

This video tutorial discusses the platysma muscle, a superficial neck muscle involved in facial expressions. It covers the anatomy, function, and social role of the platysma, comparing its function in humans and animals. The video also explains the muscle's innervation by the facial nerve and its clinical significance. Additional resources for further learning are provided.

What is the platysma muscle primarily known for?

• Being a deep neck muscle

• Part of the mimic musculature

• A muscle in the lower back

• A muscle in the arm

How does the platysma muscle contribute to facial expressions?

• By moving the jaw

• By controlling the eyelids

• By altering the skin on the neck

• By changing the shape of the nose

What happens to the platysma muscle as the skin loses elasticity?

• It changes color

• It disappears

• It becomes stronger

• It forms longitudinal wrinkles

In animals, what is a significant function of the platysma muscle?

• To help them fly

• To aid in digestion

• To get rid of insects

• To improve hearing

Which nerve is responsible for the innervation of the platysma muscle?

• The optic nerve

• The sciatic nerve

• The vagus nerve

• The facial nerve