OT503: Head/Neck Muscles & Joints

What are the layers of the scalp, from superficial to deep?

Skin, CT, Aponeurosis, Loose CT, Pericranium

The aponeurosis of the scalp is the ______ ________.

Galea aponeurotica

Which two muscles does the galea aponeurotica connect?

Occipitalis; frontalis

Which nerve innervates the facial expression muscles?

Facial nerve (CN VII)

Which facial muscle goes around the mouth?

Orbicularis oris

Which muscle is in the deep cheek?

Buccinator

Which is the long muscle that attaches to the superior lip and nostrils?

Levator labii superioris alaeque nasi

Which muscle lifts the lips superiorly in a snarl?

Levator labii superioris

Which muscle, when acting unilaterally, lifts up the corner of the mouth?

Levator anguli oris

What happens when the levator anguli oris acts bilaterally?

Smile

Which muscle pulls down on the angle of the mouth?

Depressor anguli oris

Which two muscles run across the cheeks?

Zygomaticus major & minor

Is the mentalis superficial or deep?

deep

Is the risorius superficial or deep?

Superficial

Is the buccinator superficial or deep?

Deep

Which is the “fake smile” muscle that is very small?

Risorius

Which muscle goes around the eye?

Orbicularis oculi

What are the two parts of the nasalis?

Transverse; alar

Which muscle is located between the eyebrows?

Procerus

Which muscle pulls down the septum of the nose?

Depressor septi nasi

Which muscle wiggles the ears?

Auricularis

Which muscle is directly under the eyebrows that helps to furrow thou brow?

Corrugator supercilii

Which facial muscle is also in the neck?

Platysma

What are the four muscles of mastication?

Masseter, temporalis, medial and lateral pterygoid

Which nerve are the muscles of mastication innervated by?

Trigeminal nerve (CN V)