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Canine paroxysmal movement disorders

Mark Lowrie, Laurent Garosi
Paroxysmal dyskinesias (PDs) are a group of hyperkinetic movement disorders characterised by circumscribed episodes of disturbed movement, superimposed on a background state in which such abnormality is absent. There is no loss of consciousness. Episodes can last seconds, minutes or hours, and the beginning and end of the movement disturbance are abrupt. Neurological examination is typically normal between episodes. PDs are associated with a broad spectrum of clinical presentations, encompassing various aetiologies...
February 2017: Veterinary Journal
Ana L Kolicheski, Gary S Johnson, Tendai Mhlanga-Mutangadura, Jeremy F Taylor, Robert D Schnabel, Taroh Kinoshita, Yoshiko Murakami, Dennis P O'Brien
Hereditary paroxysmal dyskinesias (PxD) are a heterogeneous group of movement disorders classified by frequency, duration, and triggers of the episodes. A young-adult onset canine PxD has segregated as an autosomal recessive trait in Soft-Coated Wheaten Terriers. The medical records and videos of episodes from 25 affected dogs were reviewed. The episodes of hyperkinesia and dystonia lasted from several minutes to several hours and could occur as often as >10/day. They were not associated with strenuous exercise or fasting but were sometimes triggered by excitement...
January 2017: Neurogenetics
Mark Lowrie, Laurent Garosi
Delineation of the typical disease progression in canine paroxysmal dyskinesia (PD) may assist in evaluating therapeutic agents during clinical trials. Our objective was to establish the natural disease course in a group of dogs diagnosed with PD that received no medication. Fifty-nine dogs (36 Labradors, 23 JRTs) with clinically confirmed PD and a follow-up of ≥3 years were retrospectively reviewed. Dogs with PD had a young onset, were triggered by startle or sudden movements, and had a male bias (75%) with the majority being entire sample population...
July 2016: Veterinary Journal
M Lowrie, O A Garden, M Hadjivassiliou, R J Harvey, D S Sanders, R Powell, L Garosi
BACKGROUND: Canine epileptoid cramping syndrome (CECS) is a paroxysmal movement disorder of Border Terriers (BTs). These dogs might respond to a gluten-free diet. OBJECTIVES: The objective of this study was to examine the clinical and serological effect of a gluten-free diet in BTs with CECS. ANIMALS: Six client-owned BTs with clinically confirmed CECS. METHODS: Dogs were prospectively recruited that had at least a 6-month history of CECS based on the observed phenomenology (using video) and had exhibited at least 2 separate episodes on different days...
November 2015: Journal of Veterinary Internal Medicine
Ganokon Urkasemsin, Natasha J Olby
Paroxysmal dyskinesias are episodic movement disorders characterized by muscle hypertonicity that can produce involuntary movements. Signs emanate from the central nervous system; consciousness is not impaired, ictal electroencephalography is normal, and there are no autonomic signs, distinguishing them from seizure disorders. In humans they are classified into 3 groups, each responding to different therapies. A mutation in the gene for brevican (BCAN) has been identified as the cause of Episodic Falling in Cavalier King Charles spaniels...
November 2014: Veterinary Clinics of North America. Small Animal Practice
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