Flexion is the most extensive of all the movements of the vertebral column, and is freest in the lumbar region. In extension, or movement backward, an exactly opposite disposition of the parts takes place. This movement is limited by the anterior longitudinal ligament, and by the approximation of the spinous processes.
Iodine Allergy in Dogs. As crabs contain small amounts of iodine, and some dogs are allergic to iodine, observer your dog carefully when first giving her crab meat. If your dog shows symptoms such as watery eyes and nose, stomach upset or lethargy, your dog might be allergic to iodine, and itâs not a good idea to continue giving your dog crab meat.
1 An allergy or sensitivity. 2  sometimes the ingredients in a particular dog food can cause a puppy or dog to throw up. 3  True dog food allergies normally cause skin irritation such as 'hot spots', excessive itching, hairloss and so on.