11/7/2023 0 Comments Seat belt key holder set![]() The spinal cord is particularly vulnerable to direct injury within the foramen. The spinal column, which surrounds and protects the spinal cord, is made up of 33 rings of bone (vertebrae), pads of cartilage (discs), and narrow spaces called foramen that act as passages for spinal nerves to travel to and from the rest of the body. ![]() Sacral spinal nerves (known S1 to S5) in the low back control signals to the thighs and lower parts of the legs, the feet, most of the external genital organs, and the area around the anus.Lumbar spinal nerves (known L1 to L5) in the low back control signals to the lower parts of the abdomen and the back, the buttocks, some parts of the external genital organs, and parts of the leg.Thoracic spinal nerves (known as T1 to T12) in the upper mid-back control signals to the chest muscles, some muscles of the back, and many organ systems.Cervical spinal nerves (known as C1 to C7) in the neck control signals to the back of the head, the neck and shoulders, the arms and hands, and the diaphragm.Other types of nerve cells sit just outside the spinal cord and relay information to and from the brain. Bundles of nerve fibers (axons), some of which are coated with a whitish mixture of proteins and fat-like substances (white matter) that connects nerve cells over longer distances.A collection of nerve cells and their projections that connect with other nerve cells to transmit and receive information (gray matter).Like the brain, the spinal cord is protected by three layers of tissue and is surrounded by the cerebrospinal fluid (CSF) that acts as a cushion against shock or injury. ![]() The spinal cord extends from the brain to the lower back through a canal in the center of the vertebrae. Millions of nerve cells situated in the spinal cord itself coordinate complex patterns of movements such as rhythmic breathing and walking. It sends and receives information between the brain and the rest of the body. The spinal cord is a soft, cylindrical column of tightly bundled cells (nerve cells and glia), nerve fibers that transmit nerve signals (called axons), and blood vessels.
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