Muscle groups and facial expressions:

What muscles make up the quadriceps?

Rectus femoris, vastus medialis, vastus intermedialis, vastus lateralis

What muscles make up the iliopsoas?

Psoas major/minor and illiacus

What muscles are used in chewing?

Masseter and temporalis

What muscles make up the rotator cuffs?

Supraspinatus, infraspinatus, subscapularis, and teres minor

What muscles make up the hamstrings?

Biceps femoris, semitendinosus, and semimembranosus

Smile

Zygomaticus major

Pucker

Orbicularis oris

Pout

Mentalis

Tense neck

Platysma

Angry eyebrows

corrugator supercilii

Raised eyebrows/wrinkled forehead

Epicranius (frontal belly)

Blink

Orbicularis oculi