Neuro Final Flashcards
What is the most common pathology of muscular dystrophy?
absence of dystrophin
What dog breeds get myotonia?
chow chows and mini schnauzers
What is the CS for cushings myopathy?
unilateral pelvic limb stiffness
What is the pathology of acute canine polyradiculoneuritis?
inflammation of peripheral nerve roots after exposure to raccoon antigen
How is acute canine polyradiculoneuritis diagnosed?
albuminocytologic dissociation on CSF, biopsy
What breeds most commonly get acquired myasthenia gravis?
akitas, newfies, GSD, labs, goldens
What is the definitive diagnosis for acquired myasthenia gravis?
AcH receptor antibody test
What is the tensilon test?
inject edrophonium chloride to test for myasthenia gravis
What long acting acetylcholinesterase inhibitor can be used to treat myasthenia gravis?
pyridostigmine bromide
Term for nerve injury with no damage to axon and the patient recovers in 1-6 weeks.
neuropraxia
Term for nerve injury where there is interruption between axon and cell body.
Axonotmesis
Term for nerve injury where there is complete severance.
Neurotmesis
What are examples of presynaptic nerver junction toxins?
tetanus, botulism, tick paralysis
What are examples of postsynaptic nerve junction toxins?
snake bites, organophosphates
What 2 diseases lead to neuro signs in snakes?
paramyxovirus
inclusion body disease
Loss of fine movements in a bird would indicate what neurological lesion?
cerebral
Hypermetric and intention tremors in a bird would indicate what type of neuro lesion?
cerebellar
Paralysis or paresis in a bird would indicate what type of neuro lesion?
proprioceptive
What are some possibilities for an ataxic african gray parrot?
proventricular dilitation dz
organophosphate toxicity
What are the CS of E. caniculi in rabbits?
head tilt, seizures, incontinece, peripheral neuropathy
How is E. caniculi diagnosed?
antibody titers
What is the treatment for E. caniculi?
benzimidazole anthelmintics, anti-inflammatories
Where does type II IVDD usually occur?
L7-S1 with lumbosacral stenosis
What are the CS of Type II IVDD?
pain, raised tail, myelopathy, possible incontinence
What is the definitive diagnostic tool for degenerative myelopathy?
histopath
What is the pathophysiology of degenerative myelopathy?
non inflammatory axonal degeneration (mutation in superoxide dismutase gene)
What type of cervical spondylomyelopathy do young giant breed dogs get?
osseous associated compressions
What type of cervical spondylomyelopathy do middle aged large breed dogs get?
disc associated compressions
What is the most common surgical treatment for atlantoaxial luxation?
ventral transarticular screws -> allows fusion of joint
What does hypovitaminosis A cause in cats?
hypertrophic bone formation of vertebrae - ankylosing spondylosis
What bacteria is usually involved in discospondylitis?
staph pseudointermedius
What type of dogs get steroid responsive arteritis-meningitis?
young large breed dogs, immune mediated disorder
What bacteria causes cerebral/spinal abcesses in horses?
salmonella in younger animals
strep equi equi in older animals
What is the main clinical sign of cerebral abcesses in horses?
unilateral cortical signs - circling, young horses
What are the toxins that cause equine leukoencephalomalacia?
fusarium spp –> fumonison toxin
When is WNV most common during the year?
mid summer - fall
What seasonality is equine leukoencephalomalacia?
winter
What are CS of fumonison toxicity?
often normal, icterus, self inflicted injuries, dementia
What breed is cerebellar abiotrophy in horses?
arabians, hereditary
What horse breeds are predisposed to wobblers?
thoroughbred, standardbred, quarter horses
What age of horses are CS of wobblers usually seen?
6-24 months
What are the treatments for wobblers in horses?
ventral fusion, or dorsal laminectomy
What organism causes equine protozoal encephalomyelitis?
sarcocystis neurona
How could you differentiate equine protozoal encephalomyelitis and wobblers?
EPM is assymetrical!! (TQ)
WHat are some parasites that can cause equine parasitic encephalomyelitis?
strongylus vulgaris, setaria, hypoderma, halicephalobus, draschia
What is the most common cause of acutely ill cows with bilateral gait abnormailities but normal mentation?
lymphoma - lesion in spinal cord
What 2 diseases cause hydrocephalus in cows?
BVD and akabane
What deficiency in cows causes increased CSF pressure in calves that causes blindness and then seizures follow?
vitamin A deficiency
What kind of cows get cerebellar abiotrophy with BVD?
herefords and shorthorns
What are CS of hepaticencephalopathy in horses?
walk incessantly, photosensitization, head pressing
What may be the only sign of fumoninsin toxicity in horses?
severe proprioceptive deficits (leg crossing)
What are the pathognomonic signs for cerebellar abiotrophy in horses?
intention tremors, severe spasticity, strength preserved
What are CS of wobblers?
symmetrical, hind limbs worse
other signs of OCD in MC3, radius
At which spinal joint is wobblers lesion most common in horses?
c3-c4 (TQ)
What is the most common way of treating cervical vertebral malformation (wobblers)?
ventral fusion - basket
What type of cervical vertebral malformation do arabians get?
occipitoatlantoaxial malformation (arabians do not get regular wobblers)
What is the source of listeria for cows?
sliage - must be more acidic than 5.5 to inhibit growth
What are the CS of listeriosis in cattle?
older than 1 month, unilateral cranial nerve deficits
What is the treatment for listeriosis in cattle?
long term antibiotics
What is TEME caused by in cattle?
histophilus somni
What are the clinical signs of TEME in cattle?
rapid, death within 36 hours, ataxia, weakness, opisthotonos
What bacteria causes brain and pituitary abcesses in cattle?
arcanobacterium (trueperella) pyogenes
What are CS of brain abscesses in cattle?
asymmetric, vision loss
What causes polioencephalomalacia in cattle?
dysfunction of Na-K ATP pump (thiamine deficiency* TQ*)
What kind of diet promotes H2S gas in the development of polioencephalomalacia?
grain diets
What are CS of polioencephalomalacia in ruminants?
develop rapidly - central blindness, ataxia, strabismus, opisthotonus, convulsions
What causes otitis media/interna in cows?
mycoplasma bovis
What breed is predisposed to progressive ataxia?
charloais calves - recessive defect
What types of cows get spastic syndrome?
adult bulls - hypertonia, hypereflexia, first 12 months of age
What is the tx for OP toxicity in ruminants?
atropine
What CS are from sciatic nerve paralysis in cows?
toe touching
What CS are from femoral nerve damage in calves from dystocias?
atrophy of thigh muscles
What are CS from tibial nerve damage in cows?
hock drop but still can stand
What are CS from peroneal nerve damage in cows?
knuckling over, similar to tibial
What are CS of radial nerve paralysis in cows?
dropped elbow but supports weight (most common)
What is NOT a clinical sign of edema disease in pigs?
no fever, no diarrhea
Which CSF tap on a horse requires general anesthesia?
atlantooccipital space
How is EPM treated in horses?
sulfa/pyrimethamine = folic acid inhibitors
or diclazuril and ponazuril (labeled)
What are CS of parasitic encephalomyelitis in horses?
assymetric signs like EPM, xanthochromia, increased inflammatory cells in CSF
How is parasitic encephalomyelitis in horses treated?
10x dose of fenbendazole
What is the pathology of EHV1?
vascular infarctions of brain/cord, immune mediated vasculitis
What are the CS of neurologic EHV1?
acute onset ascending paralysis, sym or asym, paraphimosis, dec sens in perianal area
What is the tx for EHV1?
corticosteroids, antibiotics for 2ndary infection
What is the cause of equine degenerative myelopathy?
defect in Vit E uptake/metabolism
What are the CS of equine degenerative myelopathy?
symmetrical slow progressive neuro signs, warmbloods
What is the MOA of tetanus toxin?
blocks presynaptic UMN
WHat is a pathognomic sign for tetanus in a horse?
third eyelid flips up
How often should horses be vaccinated against tetanus?
every year
What is the MOA of botulinum toxins?
blocks LMN AcH release (motor end plate) –> flaccid paralysis
What is an early CS of botulism in horses?
dysphagia
What diseases are vaccinated against for horses yearly in the spring?
tetanus toxoid, eastern and western encephalitis, influenza and herpesvirus
At what months are pregnant mares vaccinated with EHV1?
5, 7, 9
At what time should pregnant mares be vaccinated against tetanus, WEE, rabies, and influenza?
4 weeks prior to foaling