Equine neurology Flashcards

1
Q

where can a lesion of the brain be localised to?

A

forebrain
brainstem
cerebellum
vestibular system

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2
Q

where do the sympathetic nerves exit the spinal cord?

A

thoracolumbar region

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3
Q

where do the parasympathetic nerves exit the nervous system?

A

craniosacral region

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4
Q

what is assessed from a distance on the neurological exam?

A

mentation
behaviour
posture

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5
Q

what are behaviour abnormalities of horses?

A

aggression
compulsive walking/circling
loss of learnt behaviour
vocalisation

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6
Q

what postural abnormalities is looked for when observing the horse?

A

head turn/tilt

wide base stance

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7
Q

how can the optic nerve be assessed?

A

sight (compensate well)
menace
pupillary light response

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8
Q

how can the oculomotor, trochlear and abducens nerve be assessed?

A

eye position

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9
Q

how is the trigeminal nerve assessed?

A

atrophy of masticatory muscles

palpate/tap face (sensation)

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10
Q

how is the facial nerve assessed?

A

facial symmetry

facial expression

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11
Q

how can the vestibulocochlear nerve be assessed?

A

head posture
hearing
normal nystagmus
normal gait

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12
Q

when assessing the vestibular system of a horse, what should be done?

A

blindfold the horse

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13
Q

how are the glossopharyngeal, vagus and accessory nerves assessed?

A

watch the horse eat

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14
Q

how is the hypoglossal nerve assessed?

A

pull tongue to the side (should retract)

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15
Q

what is assessed at the back end of a horse?

A

anal tone
tail clamp (shouldn’t be easy to lift)
perineal reflex

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16
Q

how can proprioception be assessed in horses?

A

walk them and stop to see if they place there legs in a normal position when stopped

17
Q

what is ataxia?

A

subconscious proprioceptive deficits seen as irregular or unpredictable movement

18
Q

when will ataxia be exaggerated?

A

when turning tight circles

19
Q

where can ataxia be localised to?

A

cerebellum
vestibular
spine

20
Q

what ataxia is associated with the cerebellum?

A

hypermetric (no weakness)

21
Q

what are the signs of ataxia associated with the vestibular system?

A

loss of balance
hypometric
wide base
(other vestibular - head tilt, nystagmus…)

22
Q

what ataxia is associated with spinal lesions?

A

dysmetric (possible weakness)

23
Q

how can ataxia be classified?

A

subtle - barely detectable
mild - detected normally and exaggerated on certain manoeuvres
moderate - buckle and fall with certain manoeuvres
severe - trip and fall spontaneously

24
Q

what are the two types of weakness?

A

extensor (buckling)

flexor (toe drag)