And most cats with this condition will take off running out of the blue as though something scared them or is chasing them. Kitties with hyperesthesia also have muscle spasms and twitches, and twitching of the tail. If your cat has the syndrome, he may show sensitivity when any point along his spine or back is touched. He may chase his tail, bite at himself, turn toward his tail and hiss, vocalize, run and jump.
Sitting allows you to relax almost all of the muscles of your body except for the ones that keep you from leaning over to the side and forward. Pressure on your lumbar discs is significantly high in this position. While in this position, the muscles that stabilize the lower back, hip and pelvic area lose their support.
The role of the gluteus medius during activities such as walking and running is to dynamically stabilize the pelvis in a neutral position during single leg stance. As you can see in the photo below, weakness of the right gluteus medius will cause the left hip to drop when standing on the right limb. Conversely, athletic patients are often masters of compensation and may be able to keep the pelvis in neutral while the lower leg will adduct and internally rotate.