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Test your knowledge Continued

Question 6
9 year-old female spayed Labrador presented for evaluation of 3 week history of progressive muscle wastage on the right side of the head.  Neurological examination revealed atrophy of the right temporalis and masseter muscles, right-sided enophthalmia and partial protrusion of the third eyelid, mildly reduced jaw tone and reduced tear production on the right eye on Schirmer tear test.  Explain the anatomical basis for the neurological signs observed and provide a lesion localisation.  What is your differential diagnosis?
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Question 7

11 year-old female spayed Boxer presented for evaluation of 5 day history of drooping of the left side
of the face and excessive drooling on that same side.  Neurological evaluation revealed drooping
and inability to move the ear and lip, absent spontaneous and provoked blinking (loss of palpebral reflex), and absent abduction of the nostril during inspiration on the left side.  What is your lesion localization and main differential diagnosis?
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Question 8

9 year-old male Labrador presented for evaluation of 36 hour history of rapidly progressive inability
to walk and generalised flaccidity.  Neurological examination revealed normal mental status, ventro-flexion of the neck, non-ambulatory severe tetraparesis, absent postural reactions on all 4 limbs,
loss of segmental spinal reflexes and loss of muscle tone on all 4 limbs.  What is your lesion localisation and differential diagnosis?
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Question 9

8 year-old female spayed crossbreed presented for evaluation of acute onset of paraplegia 2 hours ago.  What are the clinical significance of the evaluation of the withdrawal (flexor) reflex and of the nociception (also called deep pain sensation) in such a case?
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Question 10

4 year-old female spayed SBT presented for evaluation of 3 day history of progressive stiffness on
all 4 limbs, difficulty eating and drinking, and abnormal facial expression.  What is the most likely diagnosis and how would you treat this dog?
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