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MCQ 1.2 > Maxillary And Ophthalmic Nerve > Flashcards

Maxillary And Ophthalmic Nerve Flashcards

1
Q

What is the innervation of the maxillary and ophthalmic nerves

A

Trigeminal and facial nerve

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2
Q

Where does the ophthalmic nerve arise from

A

The trigeminal ganglion

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3
Q

What are the 3 branches that the ophthalmic nerve divides into

A

Frontal nerve
Lacrimal nerve
Nasociliary nerve

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4
Q

What 2 branches does the frontal ophthalmic nerve divide into

A

Supra orbital nerve
Supra trochlear nerve

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5
Q

What does the supra orbital nerve supply

A

Skin of scalp as far as lambdoid suture, pericranium and upper eyelid

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6
Q

What does the supra trochlear nerve supply

A

Skin of lower part of forehead close to midline, conjunctiva and upper eyelid

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7
Q

Which ophthalmic branch is largest

A

Frontal nerve

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8
Q

Which ophthalmic branch is smallest

A

Lacrimal branch

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9
Q

What does the lacrimal branch supply

A

Lacrimal gland, conjunctiva and upper eyelid

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10
Q

How does the lacrimal branch enter the orbit

A

Through superior orbital fissure and moves along lateral wall of orbit to end in upper eyelid

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11
Q

What are the 5 branches of the nasociliary nerve

A

Ramus communicans to ciliary ganglion
Long ciliary nerve
Infratrochlear nerve
Posterior ethmoidal nerve
Anterior ethmoidal nerve

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12
Q

What does the ramus communicans to ciliary ganglion do

A

Contains sensory fibres from eyeball via short ciliary nerves without interruption through ciliary ganglion

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13
Q

What does the long ciliary nerve do

A

Distribute to ciliary body, iris and cornea
Made up of sympathetic post ganglionic fibres which innervate dilator pupillae muscles of iris and sensory fibres from cornea

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14
Q

What does the infratrochlear nerve do

A

Lacrimal sac, conjunctiva, eyelids, upper lateral aspect of nose

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15
Q

What does the posterior ethmoidal nerve do

A

Supplies ethmoidal and sphenoidal sinuses

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16
Q

What does the anterior ethmoidal nerve do

A

Supplies anterior ethmoidal cells via ethmoidal foramen
Enters nasal cavity through slit on side of crista galli supplying adjacent nasal mucosa and terminates as external nasal branch supplying skin of nasal dorsum

17
Q

What does the maxillary nerve exit through

A

Foramen rotundum via Pterygopalatine fossa

18
Q

What does the maxillary nerve run through

A

Lateral wall of cavernous sinus

19
Q

What does the Pterygopalatine fossa contain

A

Maxillary nerve and its two branches, zygomatic and posterior superioalveolar
Pterygopalatine ganglion and its numerous branches containing fibres of maxillary nerve mixed with autonomic nerves

20
Q

What does the Pterygopalatine ganglion supply

A

Lacrimal gland - zygomatico temporal
Palatine, pharyngeal, nasal glands

21
Q

Is the Pterygopalatine ganglion sympathetic or parasympathetic

A

Largest peripheral parasympathetic ganglion

22
Q

What are the 4 maxillary nerve branches

A

Middle meningeal nerve
Zygomatic nerve
Posterior superior dental (alveolar) nerve
Infraorbital nerve

23
Q

What does the zyomaticofacial nerve do

A

Supplies skin over bone

24
Q

What does the zygomaticotemporal nerve do

A

Supplies skin above zygomatic arch carries postganglionic Secretomotor fibres for lacrimal gland before it enters zygomatic bone

25
Q

What does the posterior superior alveolar nerve supply

A

Molar teeth, buccal bone and soft tissues and maxillary sinus

26
Q

What does the anterior superior alveolar nerve supply

A

Incisors, canine, premolars and mesial buccal root of upper 6, maxillary sinus

27
Q

Where does the anterior superior alveolar nerve originate from

A

Infra orbital nerve before it emerges from infra orbital foramen

28
Q

What does the Palpebral branch supply

A

Skin of lower lid and conjunctiva

29
Q

What does the nasal branch supply

A

Skin along external nose

30
Q

What does the labial branch supply

A

Skin and mucous membrane of whole upper lip and adjacent gum

31
Q

What is corneal reflex

A

Involuntary blinking of eyelids stimulated by tactile, thermal or painful stimulation of cornea

32
Q

What happens to the ophthalmic nerve during corneal reflex

A

It acts as an afferent limb detecting stimuli

33
Q

What does it mean if the corneal reflex is absent

A

Sign of damage to trigeminal/ophthalmic nerve or facial nerve

MCQ 1.2 (34 decks)

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