image of Ataxia
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Ataxia is defined as an uncoordinated gait. It can arise from a sensory peripheral nerve lesion or a spinal cord lesion, a vestibular lesion or a cerebellar lesion. This chapter discusses classification and clinical signs, differential diagnoses, diagnostic approach and diagnostic tests required.

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Image of 5.6.2
5.6.2 An approach to localizing the region of the nervous system from which ataxia may arise.
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5.6.3 Dorsal and transverse T2-weighted MR images of the lumbar spinal cord in an ataxic cat with ischaemic myelopathy (suspected fibrocartilaginous embolic myelopathy). Note the focal ill-defined hyperintensity within the spinal cord (arrowed).
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5.6.4 Sagittal and transverse T2-weighted MR images of the caudal lumbar spine in a cat with disc extrusion (arrowed) at L6/7 causing marked spinal cord compression.
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5.6.5 Sagittal T2-weighted and transverse T1-weighted contrast-enhanced MR image of a cat with the dry form of CNS FIP. On the transverse image, there is marked dilatation of the lateral and third ventricles, as well as enhancement of the ependymal lining and meninges (arrowheads). On the sagittal image, the third and fourth ventricles (arrows) are markedly dilated, causing compression and caudal foramen magnum herniation (arrowhead) of the cerebellum, as well as oedema within the cranial cervical spine.
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