Parasagittal ultrasonogram in epidural space in goat at L5- L6 showing hypoechoic muscles and the echoic lumbar fascia (M), hyper-echoic vertebral body of L5 and L6 posteriorly by an-echoic body of sacrum (Sac). Hyper-echoic line ligamentum flavum. (P). nervous structures appeared as multiple, small hyperechoic rods (NS). Skin (S)