Anterior Eye Nerve Supply

Front 1

Two divisions of nervous system:

Back 1

Central nervous system- supplies brain and spinal cord

Peripheral nervous system

Hint 1

Cns and Pns

Front 2

How is the peripheral nervous system divided?

Back 2

Somatic and Autonomic

Front 3

Are motor fibres efferent or afferent?

Back 3

Efferent- they cause an effect e.g on extraocular muscles

Front 4

What function do parasympathetic fibres have and what is their main neurotransmitter

Back 4

Rest and digest

Main transmitter is ACH Acetylcholine

Front 5

What main function do sympathetic fibres have and what is their main neurotransmitter

Back 5

Fight or flight

Noradrenaline

Front 6

What does injury to a sensory nerve cause

Back 6

Anaesthesia

Front 7

What does injury to a motor nerve cause

Back 7

Paralysis if complete, paresis if partial

Front 8

Which two nerves to the eye are afferent (eg sensory- carry information from eye or structures)

Back 8

Optic nerve (II)

Trigeminal (V)

Front 9

Which 4 nerves are efferent- motor- carry information from CNS to the eye)

Back 9

Oculomotor (III)

Trochlear (IV)

Abducens (VI)

Facial (VII)

Front 10

Parasympathetic fibres innervate: a) sphincter pupillae or b) dilator pupillae

Back 10

A) sphincter

Front 11

What are the 3 branches of the trigeminal nerve

Back 11

1. Ophthalmic

2. Maxillary

3. Mandibular

Front 12

What are the 3 branches of the ophthalmic nerve division

Back 12

1. Frontal

2. Lacrimal

3. Naso ciliary

Front 13

How do all three of the ophthalmic division branches communicate with in the brain?

Back 13

Trigeminal ganglion

Front 14

What does the frontal branch of the ophthalmic nerve division receive sensory input from?

Back 14

Skin, forehead muscles and Upper lid

Front 15

What does the lacrimal branch of the ophthalmic nerve division receive sensory fibres from?

Back 15

Upper lid, temple, lacrimal gland

Front 16

What does the naso ciliary branch of the ophthalmic nerve decision receive sensory input from?

Back 16

Trochlear nerve

Ethmoid nerves

Long ciliary nerves

Sensory root of ciliary ganglion

Hint 16

4 answers

Front 17

Where does the herpes zoster virus lay dormant?

Back 17

Sensory ganglion

Front 18

10% of cases of herpes zoster affect which branch of the trigeminal nerve?

Back 18

Ophthalmic division

Front 19

Which other part of the face is affected if herpes zoster affects the eye (via naso ciliary branch)

Back 19

Tip of nose

Front 20

A third nerve palsy is likely to show which movement in the affected eye?

Back 20

down and out

Front 21

A third nerve palsy will result in which lid abnormality

Back 21

Ptosis

Front 22

Which nerve innervates the iris sphincter and ciliary muscle

Back 22

Oculomotor

Front 23

Because the iris sphincter is not functioning in a third nerve palsy, what happens to the pupil?

Back 23

Unreactive and dilated

Front 24

The Trochlear nerve (IV) provides innervation to the: contralateral or ipsilateral eye?

Back 24

Contralateral- it’s the only cranial nerve to do this

Front 25

Which muscle does the Trochlear nerve innervate

Back 25

Superior oblique

Front 26

The Trochlear nerve passes into the orbit above which region?

Back 26

Annulus of zinn

Front 27

What visual symptom will a px with a IV nerve palsy experience and why?

Back 27

Vertical diplopia because superior oblique muscle not working, eye has a depression and intorsion movement

Front 28

In the event of trauma which is the most commonly injured nerve

Back 28

Trochlear

Front 29

What causes other than injury can lead to IV nerve palsy?

Back 29

Diabetes

Hypertension

Disorder of the midbrain

Front 30

What type of referral does a IV nerve palsy need

Back 30

Urgent- within a week

Front 31

The abducens nerve only innervates which muscle

Back 31

Lateral rectus

Front 32

Which is the most common type of palsy?

Back 32

VI nerve palsy

Front 33

What visual symptom will a px likely experience with a palsy of the VI nerve, given the lateral rectus is affected

Back 33

Horizontal diplopia

Front 34

What could cause a VI nerve palsy

Back 34

Diabetes

Cranial pressure

Front 35

Which intrinsic ocular muscle is innervated by the facial nerve

Back 35

Orbicularis oculi

Front 36

Corneal reflex is stimulated by?

Back 36

Touch or light

Front 37

If the cornea Is touched with branch of the ophthalmic nerve is stimulated

Back 37

Nasociliary branch

Front 38

Which type of nerve impulse travels along the facial nerve to activate the orbicularis oculi and cause a blink?

Back 38

Efferent

Hint 38

Efferent or afferent

Front 39

Which nerve send parasympathetic fibres to lacrimal gland to stimulate secretion

Back 39

Facial nerve

Front 40

Which system innervates these functions:

Pupil dilation

Accommodation reduction

Lacrimal gland production

Eyelid widening

Choroidal and conjunctival vessel constriction

Back 40

Sympathetic

Front 41

Ciliary contraction, pupil constriction and increased lacrimation are produced by which part of the nervous system

Back 41

Parasympathetic