Saturday, September 14, 2013

Epilepsy in Dogs Part 1



What is epilepsy?










Cream - Seizure Alert Dog
Know the signs of seizure



It is a condition of recurring seizures wherein uncoordinated firing of the neurons in the cerebrum takes place. In dogs, it is not fully understood but it has some similarities with the causes in human beings. Neurotransmitters are chemically imbalanced so the nerves are uncoordinated. An epileptic dog will show uncoordinated firing of the neurons within his brain. These are called seizures, also known as fits or convulsions. It usually starts in dogs at the age of 6 months to 5 years.





Two different types of Epilepsy:





1. Idiopathic Epilepsy- The cause is unknown, it may be inherited.






2. Secondary Epilepsy – Normally, a vet will run some tests to rule out possible toxic, or physiological causes before he makes his diagnosis as the dog having idiopathic version. There are many types of seizures seen in dogs and often, the owner is not aware of his pet’s condition. Epileptic seizure is the abnormal brain activity manifested in the part of the brain called the cerebral cortex. These abnormalities that cause convulsions vary from petit mal to generalized, full body grand mal.







4 stages of seizure:





1. The Prodome – It lasts from minutes to hours and sometimes days before the actual convulsion. The dog will show changes in his behavior or mood.





2. The Aura - The owner will notice the initial signs during this stage. Some pet dogs will begin trembling, salivating, licking, pacing, wandering aimlessly, hiding, urinating, or whining. Some other dogs may show stranger behaviors like excessive barking and attempts to get the owner’s attention.





3. The Ictus – This is the actual seizure stage, wherein the dog may lose consciousness, gnash his teeth, thrashing about his legs and head, crying, drooling, losing bladder and bowel control, and paddling his feet like he is running. Some stranger types of seizures in dogs will make the dog suddenly go blank and just stare into space, while others will frantically run in circles. The ones with partial seizures will experience twitching in one area of his body only, it could be in one leg, his face, in his hips, or in the shoulder.







4. The Ictal – It happens just after a convulsion. The dog will act like he’s doped, drunk, deaf, or blind. Some dogs may endlessly pace, or drink lots of water. Others pass out and sleep. 





Causes of seizures





Seizures can be caused by many conditions:



  • Liver disorders

  • Brain tumors

  • Congenital  defects

  • Low sugar (hypoglycemia) or conditions like diabetes mellitus

  • Fever or hyperthermia

  • Heart problems, difficulty breathing, or anemia  

  • Kidney disorders

  • Brain damage resulting from trauma or poor blood flow to the brain

  • Infections like canine distemper

  • Low calcium in females that are nursing young

  • Toxins such as antifreeze, chocolate, or lead

  • Primary / idiopathic epilepsy

  • Certain medications the dog is taking



What triggers a seizure?



It is unknown but a lot of dogs experience convulsions when excited. Very often, the dog seizures while playing, or when children have just returned from school. One dog had seizures after visiting the vet hospital. Other dogs have seizures while asleep. Do not confuse this with dreaming since it is not uncommon for dogs to shake or bark while asleep. You can awaken a dreaming dog, but not a dog having seizures.





How is epilepsy diagnosed?




Firstly, the vet will obtain detailed history. Neurologic, physical exams, and laboratory tests are then be performed. Sometimes x-rays are also taken. If the vet cannot identify the cause of the convulsion, the condition is then diagnosed as idiopathic. No test is yet available to diagnose epilepsy per se, the tests simply rule out the other causes of convulsions.


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1 comment:


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