The five pairs of lumbar spinal nerves are L1, L2, L3, L4, and L5. These nerves emerge from the lumbar region of the spinal cord and are part of the larger group of spinal nerves that branch out to innervate various body regions. Each pair corresponds to a specific vertebral segment in the lower back.
There are 12 pairs of Dorsal nerves also know as thoracic nerves. They emerge from the thoracic vertebrae hence the name.
The medical name for a spinal cord injury is Quadriplegia or Tetraplegia if the cord is damaged in the cervical (neck) region. If the spinal cord is damaged in the Thoracic area or lower, then the paralysis is refered to as Paraplegia. Also, injuries to the Lumbar and Sacral nerves which result in paralysis, are refered to as Cauda Equina Syndrome.
In an adult the lower end of the spinal cord usually ends at approximately the first lumbar vertebra, where it divides into many individual nerve roots (L1). That is the reason Lumbar Puncture usually perform at L3-L4 in order to prevent accidentally injure to the spinal cord. The point where the spinal cord ends is referred to as the "conus medullaris"
The proper name is Mixed Spinal Nerve.They do not have individual names, however. They are referred to by their number, with number one just above the first rib and the 31st going through the foramen between sacral 4 & 5.
Discs
There are different types of nerves in the human body namely: the cranial nerves, the spinal nerves, the sympathetic nerves, and the encephalon nerves just but to mention a few. Examples of these nerves includes: the optic nerve, the facial nerve, the vagus nerve, the thoracic nerve, and accessory nerve.
Essentially, when a spinal tap is given, a needle is inserted into the spinal canal in the lumbar area, medicine (or an anesthetic) is inserted directly into the cerebrospinal fluid (CSF). Numbness is usually immediate. However, in an epidural, a hollow needle and a catheder are inserted into space between the spinal column and the outer membrane of the spinal cord (EPIDURAL space). Hence the name "epidural".
Motor nerves are also known as efferent nerves. They differ from sensory nerves in the nervous system by carrying signals from the brain and spinal cord to muscles and glands, controlling movement and bodily functions. Sensory nerves, on the other hand, transmit signals from sensory organs to the brain and spinal cord, allowing us to perceive and respond to our environment.
These are 12 pairs of nerves called the cranial nerves.
cranial which contains the brain and spinal which contains the nerves of the spinal cord.
lumbar vertebrae
Cranial nerves are named based on their function or the region they innervate. They are also numbered based on their location from anterior to posterior as they emerge from the brain. There are 12 pairs of cranial nerves, each with a unique name and number.