Lecture 5 pupils Flashcards
Normal pupils are (equal/unequal) members of a team
equal
The pupil control system is so important it has (two/three) “managers”
two
occurence of two simultaneous movements associated with one another is called a (synergy/synkinesis/triad)
synkinesis
T/F the pupils have not connection to the rest of the body
F. The pupils reflect the body they live in
(one/both) pupils dilate to allow in more light
(one/both)pupils constrict to allow better focus
both , both
If you illuminate one pupil (both/one) pupil will respond
both -it is consensual
when you are shinning the light to one pupil and checking that same pupil.that is called (direct/consensual)
direct
T/F both pupils are equal in size
T
both pupils will respond equally if a light stimulus is moved will respond (equally/unequally) if a light stimulus is moved from one eye to another
equally
Anisocoria is when the pupils are (equal/unequal)
unequal-its an anatomic defect
What is the normal size of pupils within each other in mm? A)1.0 B)0.75 C)0.5 D)1.5
0.5
T/F the level of illumination will not change the amount of anisocoria
T
What are the two systems that control pupils?
para and sympathetic system
In charge of closing (miosis/pupil constriction)
Pupillary light reflex
Target is the iris sphincter
Neurotransmitter is acetylcholine
–is what the (parasympathetic/sympathetic) systems is in charge of
parasympathetic
About (half/all) the fibers cross over at the __(optic chiasm/brain/cerebellum)__ when light illuminates the retina and signals are carried by the nerve fibers to the brain
half
optic chiasm
Fibers of the pupil leave the optic tract adn enter teh _(brachium/midbrain) of the superior coliculus
brachium
pupil fibers head from the (cerebellum/midbrain) toe the pretectal nucleus
midbrain
The fibers of the pupil leave the optic tract and enter the brachium of the superior coliculus
The pupil fibers head for the midbrain to the pretectal nucleus
describes the pupillary light reflex it s (efferent/afferent) pathway
afferent
The (midbrain/pretecal/brachium) nucleus sends information to the Edinger-westphal nucleus on both sides
The signal travesl via CN (V / III)
pretecal
III
The pretectal nucleus sends information to Edinger-Westphal nucleus on both sides
The signal travels via CN III back to eye
describes the pupillary light reflex it s (efferent/afferent) pathway
efferent pathway
- .The pretectal nucleus sends information to Edinger-Westphal nucleus on both sides
- .Both pupils constrict!
- .Synapse at the ciliary ganglion
- .The signal travels via CN III back to eye
- .End destination is the iris sphincter
-put these in the correct order
- The pretectal nucleus sends information to Edinger-Westphal nucleus on both sides
- The signal travels via CN III back to eye
- Synapse at the ciliary ganglion
- End destination is the iris sphincter
- Both pupils constrict!
After synapse happens at the ciliary ganglion what is the end destination?
iris sphincter
In charge of opening (mydriasis/dilation)
Normal alert person
Target is the iris dilator
Two neurotransmitters:
Preganglionic is acetylcholine
Post ganglionic is nor-epinephrine
–is what the (parasympathetic/sympathetic) systems is in charge of
sympathetic
Hypothalamus is in charge of (parasympathetic/sympathetic) impulses
sympathetic
Sympathetic pathway has a (two/three) neuron are
three
Name the three neuron arc:
___ order neuron
____order neuron
___order neuron
first, second, third
The (hypothalamus/hippus) give vermiform movement and rhythmic movement of pupils
hippus
the (hypthalamus/hippus) is responsible for the unstable equilibrium between teh sphincter and dilator
hippus
T/F hippus is controlled by both the para and sympathetic systems
T
Near triad includes what?
accommodation, convergence, miosis
The Near triad is (dependent/independent) of illumination
Decreased accommodative ability
Hyperopes accommodating at distance
independent
older pupils are (larger/smaller)
smaller
Pupils of diabetics are (smaller/larger)
smaller
Pain or ocular inflammation (will/will not) constict the pupil
will
pupils of chronic alcoholics are (large/small)
small
Step _: Measure the size of the pupils Bright illumination Dim illumination Step _: Check the afferent system of each eye Step _: Check the direct light reflex Check the consensual reflex Step _: Check the accommodative response (write the correct number order of each step)
Step 1: Measure the size of the pupils Bright illumination Dim illumination Step 3: Check the afferent system of each eye Step 2: Check the direct light reflex Check the consensual reflex Step 4: Check the accommodative response
In step 1 you want to have pt look at a distance of 20/___ letter and have glasses (on/off)
400 off
you want to measure your pupil size to the nearest \_\_mm A)1.0 B)0.75 C)0.5 D)1.5
0.5
where do you want to put the light when you do a dim room illumination to measure the pupil in step 1
under the chin
during step 1 , when dim light illuminate pupils (should/shouldn’t ) be asymmetric by more than 0.5mm
shouldn’t
-Leave illumination dim
-Check direct response to illumination of OD:
Shine light into right eye _ seconds
At distance of 5-6 cm
-Check consensual response of OS:
Shine light into right eye _ seconds
At distance of 5-6 cm
A)1,1
B)5,5
C)2,2
D)1.5,1.5
2,2
what does a 4 mean when checking pupillary response
brisk response
When checking (afferent/efferent) integrity of pupil pathway you:
- Turn off room illumination
- Shine a bright light in OD for at least 3 seconds
- Rapidly move the light to the OS
- Hold it for at least 3 seconds
- The normal pupils should stay equally constricted
- Repeat for 2-3 cycles
afferent
When checking the afferent integrity of the pupil normal pupils (should/shouldn’t) stay equally constricted
should
T/F Check for the accommodative response only if the direct light response is abnormal/absent!
T
Unilateral, fixed, dilated pupil
describes which type (anisocoria/amaurotic/hutchinson’s) pupil
hutchinson’s
-Blind pupil
-No direct light reflex
describes which type (anisocoria/amaurotic/hutchinson’s) pupil
amaurotic
-Pupil size difference of more than 0.5 mm
-Look for lid involvement
describes which type (anisocoria/amaurotic/hutchinson’s) pupil
anisocoria
- Horner’s syndrome
- Argyll Robertson pupil
- Long standing Adie’s pupil
- all have which in common (anisocoria/amaurotic/hutchinson’s) pupil
anisocoria
- Defect along the sympathetic pathway
- Ptosis: ipsilateral side
- Miosis: More noticeable in the dark
- Anhydrosis: ipsilateral side, occurs when lesion is before carotid bifurcation and superior cervical ganglion
- —describes which disease (Horner’s syndrome/Argyll Robertson pupil/Long standing Adie’s pupil)
Horner’s syndrome
- Posterior hypothalamus to C8-T2
- Most likely lesion is a CVA
- Neck trauma
- Multiple sclerosis
- –is which type of order neuron (first/second/third) in horner’s syndrome
first
- Ciliospinal center of Budge (C8-T2)
- Leaves spinal cord
- Over apex of lung
- Synapses at the superior cervical ganglion
- Most likely lesion:
- Pancoast’s tumor
- TB
- Metastatic breast cancer
- Trauma
- Thyroid neoplasm/ surgery
- –is which type of order neuron (first/second/third) in horner’s syndrome
second
- Post ganglionic
- Internal carotid
- Two divisions:
- Nasociliary to long ciliary nerves innervates the pupil dilator
- Internal carotid dissection and aneurysm
- Nasopharyngeal carcinoma
Along the ophthalmic artery to the eye lid muscle
migraines
—is which type of order neuron (first/second/third) in horner’s syndrome
third
Horner’s syndrome is a defect along the (para/sympathetic pathway)
sympathetic
ptosis in horner’s syndrom is (bilateral/ipsilateral)
ipsilateral
(Acquired/congenital) Horner’s syndrome in children under 5 years of age might be due to neuroblastoma in (para/sympathetic) chain of chest and neck
acquired
sympathetic
(Neuroblastoma/cataract) is a malignant (cancerous) tumor that develops from nerve tissue. It usually occurs in infants and children.
neuroblastoma
T/F horner’s syndrome in children can come from a brachial plexus injury during birth
T
T/F horner’s syndrome is always malignant and congenital
F it is benign and congenital
(heterochromia/hetrophoria) having a different color iris in each eye
heterochromia
T/F heterochromia is associated with horner’s sundrome
T
-Trauma
-Adie’s tonic pupil
-Third nerve palsy
-Dilating drops
-Hutchinson’s pupil
all of these are associated with (anisocoria/amaurotic) pupil
anisocoria
T/F in anisocoria only the sphincter is not working well
F it could be either the dilator or the sphincter
in anisocoira the (dilator/sphincter) muscle does not work well when using:
- Miotic drops
- Iritis
- Horner’s syndrome
- Argyll Robertson pupil
- Long standing Adie’s pupil
dilator
in anisocoira the (dilator/sphincter) muscle does not work well when using:
- Trauma
- Adie’s tonic pupil
- Third nerve palsy
- Dilating drops
- Hutchinson’s pupil
sphincter
Adie’s tonic pupil is a (para/sympathetic) disorder
para sympathetic
- Unilaterally dilated pupil
- Poor reaction to light
- Slow tonic re-dilation
- Denervated ciliary ganglion
- 80% unilateral
- Becomes bilateral at 4% per year
- Sectoral palsy of the iris sphincter
- –describes which disease (Horner’s syndrome/Argyll Robertson pupil/Long standing Adie’s pupil)
andies tonic pupil
Light-near dissociation is a (para/sympathetic) disorder
para sympathetic
_______ dissociation Caused by midbrain lesions that are close to the pretectal synapse
light-near
in light-near dissociation accommodation fibers out number pupil fiber \_\_\_:1 A)30 B)75 C)25 D)15
30
light-near dissociation is only diagnostically valuable if the direc) light relfex is (absent or abnormal/ present or normal)
absent or abnormal
- Adie’s tonic pupil
- Argyll-Robertson pupil
- Dorsal midbrain syndrome
- Aberrant regeneration of CN III: miosis with -ADDuction
- Amyloidosis
- Diabetes
- -all of these have what type of dissociation in common
light-near dissociation
When checking for accommodative response:
- -direct patient to the 20/___ letter at distance
- -then switch gase to near card __ cm from their eyes
400, 40
When checking accmmodative response you want to recheck 2-3 looking for both ____ and ___
dilation , constriciton
- Both pupils are constricted and irregular
- Near-light dissociation
- Dilate poorly in the dark
- Respond poorly to dilating agents
- Commonly seen in:
- Syphilis
- Diabetes
- Chronic alcoholism
- Multiple sclerosis
- Sarcoidosis
- –describes which disease (Horner’s syndrome/Argyll Robertson pupil/Long standing Adie’s pupil)
argyll roberton pupils
which test checks for the afferent pupillary defect?
swinging fashlight test
The eye with the afferent defect will (dilate/constict) when directly illuminated
dilate
T/F Eye with 20/20 acuity and normal visual fields can have an APD!
T
If a pupil constricts initially but then dilates you want to trace (RAPD/APD)
APD
If a pupil dilates after a few second then you want to write (1-2+/3-4+)
1-2+
pupil dilates immediately then you write (1-2+/3-4+)
3-4+