Neurological symptoms may appear like epilepsy, inability to stand and muscular abnormal movements etc for different reasons. Reasons could be medical or dietary related. Examples may include infections like Newcastle Disease or reasons related to food and nutrition like deficiency in vitamin B1, Calcium, Glucose, being subjected to lead poisoning or by other toxic chemicals used to kill insects or rodents.
When such kinds of symptoms appear, fold the bird in a towel keeping the wings in line with the body, straighten the legs to line with the back leaving the head and neck shown out of the towel for easy breathing and bring the bird as soon as possible to the hospital for investigations and proper treatment.