The Orbit. C. Internal Orbital Features. 1. Lacrimal Gland

Question 1

What is the drainage pattern of tears?

Answer 1

lacrimal punctum, lacrimal canaliculus, lacrimal sac, nasolacrimal duct & inferior nasal meatus

Question 2

Visceral Efferent (VE) pathways innervate what structures?

Answer 2

smooth muscle, cardiac muscle and glandular tissue

Question 3

What specific pathways are identified with Visceral Efferent (VE) innervation?

Answer 3

sympathetic and parasympathetic motor pathways

Question 4

Which cranial nerves are involved in the Visceral Efferent (VE) parasympathetic pathway to the lacrimal gland?

Answer 4

facial and trigeminal (maxillary and opthalmic divisions/branches)

Question 5

Visceral efferent fibers conveyed in the seventh cranial nerve originate from which nucleus?

Answer 5

superior salivatory nucleus

Question 6

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

Answer 6

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

Question 7

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

Answer 7

pterygopalatine ganglion, sphenopalatine ganglion, Meckel’s ganglion

Question 8

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

Answer 8

vasodilation of blood vessels, increased availability of water to secretory units, thinner or more watery product in lumen;

Question 9

The sympathetic pathway to the lacrimal gland will involve what neural components?

Answer 9

spinal nerves and a neurovascular plexus around blood vessels

Question 10

What is the origin for the sympathetic pathway to the lacrimal gland?

Answer 10

lateral horn/intermediolateral cell column T1, T2

Question 11

What is the target of the preganglionic sympathetic visceral efferent (VE) fiber in the pathway to the lacrimal gland?

Answer 11

the VE fiber ascends to the superior cervical ganglion to synapse

Question 12

What is the pathway for the postganglionic sympathetic visceral efferent (VE) fiber to the lacrimal gland?

Answer 12

It joints the internal carotid artery nerurovascular plexus and continues along the opthalmic artery to the lacrimal gland where it synapses

Question 13

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

Answer 13

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