Block #3 Flashcards
What is anisocaria?
Unequal pupil size
What is the ganglia just prior to the efferent parasympathetic supply of the iris?
Ciliary ganglia
What occurs with a lesion of the optic chiasm?
Complete version and PLR loss
What might be a lesion of the optic chiasm?
Pituitary tumor
What is hemianopsia?
Loss of the opposite side of the visual field
What is central/cortical blindness?
Blindness resulting by a lesion at or after the lateral geniculate nucleus
What is a situation that would not cause anisocoria but blindness?
Lesion at or after the lateral geniculate nucleus
Is efferent or afferent dilation more marked?
Efferent
What causes a D shaped pupil?
Nasal or temporal branch of the parasympathetic innervation of a cat’s eye
What causes cavernous sinus syndrome?
Autonomic nerves passing through cavernous sinus due to the many cranial nerves through here
What is electrophysiology?
Used to asses retinal function
What is another name for the forebrain?
Proencephalon
What are the components of the forebrain?
Telencephalon and diencephalon
What diagnostics do you use for cranial bone?
CT
What diagnostic do you use for cranial tissue?
MRI
What is the most common degenerative disease in dogs?
Canine cognitive dysfunction
What is the most common anomaly/developmental disease in dogs?
Congenital hydrocephalus
What causes hepatic encephalitis?
Liver is unable to filter our toxins that enter blood
What causes hypoglycemic encephalopathy?
Brain has too little glucose, usually seizures
What causes electrolyte-associated encephalopathy?
Brain has too little Na or Ca, usually seizures
What is the most common brain neoplasia in dogs?
Meningiomas
What is the 2nd most common brain neoplasia in dogs?
Gliomas
What are the 2 viral forebrain diseases, one for each species?
Dog: Distemper
Cat: FIP
What will IPSP cause? EPSP?
IPSP: hyper polarization
EPSP: hypo polarization
What are excitatory neurotransmitters?
Glutamate
What are inhibitory neurotransmitters?
GABA
What are synchronization options with seizures (3)?
Neurons wire together
Increased GAP junctions
Structural changes in brain
What are the 4 steps to pathophysiology of seizures?
Depolarization
Synaptic transmission
Synchronization
Generalization
What is an autonomic seizure
Drooling
What is the convulsive seizure?
Generalized
Is herd twitching in bulldogs a seizure?
NO
Where do seizures always originate?
Forebrain
What are reactive seizures?
Metabolic, nutritional, and toxicity
What is the most common form of epilepsy in dogs?
Idiopathic epilepsy
What are the 6 viral neurologic diseases?
EEE
WEE
VEE
Rabies
WNV
EHV-1
What are the 2 protozoa of EPM?
S neurona
Neospora hughessi
What time of helminth will cause CNS issues in horses?
nematodes
What is EHV-1
Myeloencephalopathy
What reproductive issue does EHV-1 pose?
Abortion
How is EHV-1 managed?
Need to be isolated
How is EHV-1 tested?
Nasal swabs, whole blood, CSF
Is there a vaccine for EHV-1
NO
What is WNV vector?
Mosquito
What are the clinical sings of WNV?
Fever, others are variable
When should you vaccine a horse for the mosquito born diseases?
Before vector season
What is EEE vector?
MosquitoW
What is the region that has highest EEE?
Regions with freshwater hardwood swamps
Does EEE have a profound inflammatory response?
YES!
Under CSF what is uniquely seen under EEE?
neutrophilic pleocytosis
Is EEE reportable?
YES!
What is the definitive host of EPM?
Opossums!
What are sings of EPM - AAA?
Asymmetry
Atrophy
Ataxia
What must both be run to diagnose EPM?
Serology on serum AND CSF at same time
What is a tremor?
involuntary rhythmic movement of any part of the body
What is myoclonus?
Repeated arrhythmic shock-like jerks
What is tetanus?
Continuous contraction of extensor muscles
What is tetany?
Intermittent and variable contraction of extensor muscles
What is myotonia?
Sustained muscle contraction with delayed relaxation
What is fasciculation?
Contractioned muscle fibers, associatiated with motor unit (under skin only)
What is dystonia?
Sustained involuntary contraction of a group of muscles producing abnormal posture (only one you can see with a picture)
Why can you not treat all tremors with steroids?
Neosporosis!
Bacterial infection, steroids would cause immune suppression
What is feline Riemann-Pick disease (Sphingomyelinosis)
An abiotrophy in cats
What disease can be treated with steroids?
Steroid responsive tremor syndrome
What is the main cause of acute tremors?
Steroid response tremor syndrome
Which infectiontious disease can you not forget to consider?
Neosporosis
Which dog bread has most idiopathic head tremors?
Bulldogs
Which disease can be treated with a gluten free diet?
Paroxysmal dyskinesia
What do epileptic seizures ALWAYS have?
Facial involvement
What are the 3 functions of cerebellum?
Balance
vision
motor learning
What are the 3 functions of brain cerebrum
Sensory
Motor
Association
What controls cardiovascular and respiratory function?
medulla oblongata
What are the 2 parts of the vestibular system?
Semicircular canals
Otoliths
What is pathogenesis of THO
Articulation of bone between sytlohyoid and temporal bone that cuts off facial and vestibular nerve
What causes cerebellar abiotrophy
Mutation of MUTYH gene leading to degeneration of Purkinje cells
What horse breed is disposed to cerebellar abiotrophy?
Egyptian Arabian Foals
When does idiopathic epilepsy appear in Egyptian Arabian Foals?
days to weeks
What are clinical signs of yellow star toxicity?
Horses cannot chew, open, or close mouth completely
What causes recurrent laryngeal neuropathy?
Lesion of the recurrent laryngeal nerve on the left side
What bacteria is associated with moldy corn toxicity?
Fusarium verticilloids
What side of the body does Roaring affect?
leftq
What 2 cranial nerves does THO affect?
facial and vestibular (7 and 8)
What can be a sequelae of THO causing less tear production and less blinking?
Facial nerve paralysis will often cause corneal ulcers
What is a sign of horner’s in horses?
Horses will get sweaty on their neck
What is the difference between abiotrophy and hypoplasia
Hypoplasia is present at birth why abiotrophy is caused by a mutation in the MUTYH gene
What does MUTYH code for?
Glycosyloase involved in DNA damage repair
What is the most common cause of peripheral vestibular disease?
Otis media/interna
What is the second most common cause of peripheral vestibular disease?
Idiopathic geriatric vestibuler disease
What is the most common primary brain tumor in dogs?
Meningioma
What does a vertical nystagmus mean?
Central vestibular disease
What are the 2 types of strokes?
Ischemic
Hemorrhagic
What are the 3 most common central diseases of vestibular note?
Neoplasia
Infectious/Inflammatory
Vascular event
Is optic neuritis bilateral?
Yes
What is idiopathic bilateral inflammation of cranial nerve 5?
Trigeminal neuritis
What is the ocular form of GMA cause?
Optic neuritis
What does trigeminal neuritis cause?
Inability to close jaw
IDOPATHIC FACIAL NERVE PARYLSIS
What is a metabolic dysfunction of the facial nerve?
Hypothyroidism
What is a radio mimetic agent?
Property of killing rapidly dividing cells
What does BVDv cause props to 100 days?
death