Orbit

Question 1

What opening is located along the superior wall of the orbit?

Answer 1

optic canal

Question 2

What are the contents of the optic canal?

Answer 2

optic nerve and ophthalmic artery

Question 3

What is the name given to the medial wall of the orbit?

Answer 3

lamina papyracea

Question 4

What opening is located along the lateral wall of the orbit?

Answer 4

superior orbital fissure

Question 5

What opening is located along the inferior wall of the orbit?

Answer 5

inferior orbital fissure

Question 6

What is contained the inferior orbital fissure?

Answer 6

maxillary division of trigeminal nerve

Question 7

What are the layers of the eyelid?

Answer 7

skin, orbicularis oculi muscle, tarsal plate/tarsus, & palpebral conjunctiva

Question 8

What are the names given tot he modified sebaceous gland in the tarsus of the eyelid?

Answer 8

tarsal or Meibomian gland

Question 9

What is the location of the Meibomian gland?

Answer 9

tarsus of the eyelid

Question 10

What is the function of the Meibomian gland?

Answer 10

produces a thick, hydrophobic substance that prevents tears from overflowing onto the cheeks along the margin of the eyelid

Question 11

What is the name of modified sebaceous gland at the base of the eyelash?

Answer 11

ciliary gland

Question 12

Visceral efferent fibers conveyed int he seventh cranial nerve originate from which nucleus?

Answer 12

superior salivatory nucleus

Question 13

Preganglionic visceral efferent fibers of cranial nerve VII will exit the pons in what nerve?

Answer 13

nervus intermedius, nerve of Wrisberg, sensory root of facial nerve

Question 14

Which immediate branch of the seventh cranial nerve will convey preganglionic parasympathetic efferent fibers tot he lacrimal gland?

Answer 14

greater petrosal or greater superficial petrosal nerve

Question 15

What is the continuation of the greater petrosal nerve of the seventh cranial nerve?

Answer 15

vidian nerve or nerve of the pterygoid canal

Question 16

What are the names of the ganglion of synapse in the efferent pathway to the lacrimal gland?

Answer 16

pterygopalatine ganglion, sphenopalatine ganglion, Meckel’s ganglion

Question 17

Postganglionic parasympathetic efferent fibers from the pterygopalatine, sphenopalatine, sphenopalatine or Meckel’s ganglion will become incorporated in which cranial nerve branch?

Answer 17

maxillary nerve of the trigeminal

Question 18

The zygomaticotemporal nerve will convey postganglionic parasympathetic efferent fibers to the lacrimal gland through a communication with which branch of the fifth cranial nerve?

Answer 18

ophthalmic nerve

Question 19

Sympathetic stimulation of the lacrimal gland will result in what events?

Answer 19

vasoconstriction of blood vessels, limited availability of water to secretory units, more viscous or thicker product formed in glandular lumen

Question 20

Parasympathetic stimulation of targets in the lacrimal gland will result in what events?

Answer 20

Vasodilation of blood vessels, increased availability of water to secretory units, thinner or more water product in lumen;
constriction of myoepithelial cells leading to release of product from secretory lumen into duct system