Parasagittal ultrasonogram of the epidural space in the goat at L5- L6 showing hypoechoic muscles and the echoic lumbar fascia (M), vertebral canal as a hypoechoic round area (VC) and hyper-echoic vertebral body of L5 and L6. Hyper-echoic line of ligamentum flavum. (P). nervous structures appeared as multiple, small hyperechoic rods. Skin (S).