14/5 21/5 Neuro Quizzes Flashcards
peracute, non-progressive, improving after 2d. 10yo golden retriver
- idiopathic vestibular dz
- old dogs/cats
- suspect vascular event
dog wide base stance, ataxia, intention tremor
cerebellum
cat L sided otitis media/externa
- horners, facial n. = left peripheral vestibular signs
What is seen with paradoxical vestibular dz?
- head tilt away form side of lesion
- proprioceptive deficits ON SIDE OF LESION ALWAYS
How can the femoral n. be tested?
- Patella reflex
- unable to weight bear if lesion present(quads hip flexors and patella ligament)
How can a sciatic n. lesions be identified?
- Pseudohyperreflexia of patella reflex
- hock flexion test (withdrawal)
- plantigrade but still weight bearing
When may sciatic n lesions be seen?
chronic DM
Where are lesions if tail wag is lost?
- anywhere on spine will cause loss of wag
- floppy tail specifically = L4 - S3
What are PLR deficits suggestive of?
Brainstem lesion
cf. blindness: forebrain lesion
How can angiostrongylus vasorum be detected in the dog?
faecal smear
What clinical signs are seen with angiostrongylus vasorum?
- coagulopathy
- acute onset neuro signs d/t VASCULAR EVENT
- progressively worsening
Which virus can affect the CNS in cats? Signs?
FIP
- ^ protein, neutrophils
- multifocal
- hydrocephalus and meningeal enhancement MRI
What is the tx and prognosis of granulomatous meningioencephalomyelitis
- Tx 1st two weeks = good prog
- steroids and drugs to combat side effects
- multi focal dz
Prognosis of brain infarct?
good prognosis (depending on size and severity of lesion, function loss)
Where are different spinal tracts located within the cord?
- peripheral spinal cord = proprioception (sensory)
- motor function more deep
- nociception deepest pathways
How many cervical vertebra does a giraffe have?
7 (normal mammal 6)
where does symapthetic innervation to the eye orignate?
midbrain (-> cervcal SC, then back up in vagosympathetic trunk)
outline the pathogenesis and clinical signs of paradoxical vestibular syndrome
- by definition = central dz
- CN deficits esp 5 and 7 (v close to 8)
- postural deficits always IPSILATERAL (contralateral to forebrain)
- head tile “soft sign” usually towards but can be away
if stimulation of either eye results in OU dilation, where is the lesion?
- optic chiasm/bilat optic nerve/eina/bilat occulomotos
- menace still needed to test for vision but likely blind
What is the normal response to cutaneous trunci stiulation on either side?
Both sides should react
Outline the pathway of the cutaneous trunci reflex
- 3 neuron pathway
- dorsal horn SC synase both side SC
- branches out of brachial plexus (otor)
What drug can cause neuro signs?
Metronidazole tox (even at therapeutic doses)
- look awful but willl get better!
- just stop metronidazole
- usually ^ doses or additive effect if used long term (beware OLD formulary boks recommend higher doses than recommended now)
