in neurologic, Mini Topics, stroke, hypertension, nystagmus, vestibular 0 Comments
Here is a video of a dog that presented with acute vestibular disease. Note the nystagmus, which is the movement of the eyes back and forth:
Nystagmus in a dog with vestibular syndrome #vestibular #neuro #neurology #vertigo #nystagmus #vetmed #vettech #veterinary
A video posted by Lori Hehn, DVM (@savvyvettech) on
Classically, a head tilt is present. There is often a nystagmus. Patients are nauseous and sometimes have a history of vomiting or not eating. In severe cases they are often non-ambulatory and have a history of falling or rolling to the side (the equilibrium is abnormal).
With peripheral disease, there are no other cranial nerve deficits (except in Horner's syndrome when CN VII is affected) and no postural reaction deficits. If there is lack of conscious proprioception or other cranial nerve deficits are present, then it is most likely due to a central (brain) lesion. (i.e. decreased gag reflex, decreased tongue movement, decreased facial sensation) Central cases also often have mentation changes.
Peripheral vestibular disease is caused by pathology in the inner ear region. Because of the way the nerves exit from the brainstem, the facial nerve can be affected, and Horner’s syndrome can occur.
There are several possible causes:
Brain imaging using MRI can be helpful to look for an underlying cause so appropriate therapy can be instituted.
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Lori Hehn is a practicing veterinarian and a contributor and content manager with XPrep Learning Solutions. She has a drive for continual learning and enjoys interacting with veterinary and vet tech students. She also writes veterinary learning books for children.
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