Musculature of the External Orbit

Question 1

Identify the parts of the orbicularis oculi.

Answer 1

• orbital part
• palpebral part
• lacrimal part

Question 2

Which of the parts of the orbicularis oculi will attach to bone?

Answer 2

lacrimal part

Question 3

Which part of the orbicularis oculi will be observed within the eyelid?

Answer 3

palpebral part

Question 4

Which part of the orbicularis oculi will surround the eyelids?

Answer 4

orbital part

Question 5

What bones serve as attachment sites for the orbiularis oculi?

Answer 5

• lacrimal
• frontal
• maxillary

Question 6

What is the innervation of the orbicularis oculi?

Answer 6

temporal and zygomatic branches of the facial n.

Question 7

What muscle will be attached at the superciliary arch and the dermis over the supraorbital foramen?

Answer 7

corrugator supercilii

Question 8

What facial muscle will draw the eyebrow medial and down to form a vertical furrow?

Answer 8

corrugator supercilii

Question 9

What is the innervation of the corrugator supercilii?

Answer 9

temporal branches of the facial n.