19 Facts About Spinal cord

Spinal cord is a long, thin, tubular structure made up of nervous tissue, which extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column.

In humans, the spinal cord begins at the occipital bone, passing through the foramen magnum and then enters the spinal canal at the beginning of the cervical vertebrae.

The spinal cord extends down to between the first and second lumbar vertebrae, where it ends.

Spinal cord is the main pathway for information connecting the brain and peripheral nervous system.

Spinal cord is continuous with the caudal portion of the medulla, running from the base of the skull to the body of the first lumbar vertebra.

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Spinal cord are protected by three layers of tissue or membranes called meninges, that surround the canal.

The Spinal cord is stabilized within the dura mater by the connecting denticulate ligaments, which extend from the enveloping pia mater laterally between the dorsal and ventral roots.

In cross-section, the peripheral region of the Spinal cord contains neuronal white matter tracts containing sensory and motor axons.

Spinal cord is elliptical in cross section, being compressed dorsolaterally.

Human spinal cord is divided into segments where pairs of spinal nerves form.

Generally, the spinal cord segments do not correspond to bony vertebra levels.

Grey column, in the center of the Spinal cord, is shaped like a butterfly and consists of cell bodies of interneurons, motor neurons, neuroglia cells and unmyelinated axons.

The cauda equina forms because the spinal cord stops growing in length at about age four, even though the vertebral column continues to lengthen until adulthood.

Spinal cord is made from part of the neural tube during development.

Spinal cord is supplied with blood by three arteries that run along its length starting in the brain, and many arteries that approach it through the sides of the spinal column.

Congenital disorder is diastematomyelia in which part of the spinal cord is split usually at the level of the upper lumbar vertebrae.

Spinal cord ends at the level of vertebrae L1–L2, while the subarachnoid space —the compartment that contains cerebrospinal fluid— extends down to the lower border of S2.

Spinal cord showing how the anterior and posterior roots join in the spinal nerves.

Spinal cord showing how the anterior and posterior roots join in the spinal nerves.