What is the difference between subarachnoid anesthesia and epidural anesthesia excuse me

Subarachnoid anesthesia is the injection of narcotic drugs into the subarachnoid space, while epidural anesthesia is the injection of drugs into the epidural space. The epidural is the outer part of the dura, you go through the dura, you go under the dura, you go through the arachnoid, you go through the arachnoid and you go into the subarachnoid space. Epidural anesthesia mainly blocks the spinal nerve roots, while subarachnoid anesthesia blocks the spinal cord directly below the plane level. Epidurals are segmental, meaning you don't have a section of your body feeling, whereas subarachnoid anesthesia is truncated

That is to say, the plane of arrest, the following sensations are gone