... Hi all. I've posted this on the childrens forum, but someone there said it may be a neurology problem. My son is 7 weeks old. He does this strange thing with his legs - at anytime, he shakes one of them. It looks a bit like a dog doing a wee. He shakes it quite vigorously for about 3-4 seconds, before stopping. It almost looks like a spasm. I've asked Dr's and nurses... (3 replies)