![]() ![]() Touch something hot, and the hand is pulled away without a thought. These automatic reactions help the body to maintain posture and perform other functions, like the withdrawal reflex. These are basic reactions that are not the result of conscious movement and bypass the brain. The spinal reflex, in simplest terms, is when sensory neurons fire completely within the spinal cord. Serve as a coordinating center for spinal reflexes. ![]() ![]() Connect the peripheral nervous system to the brain.About 18 inches long, the primary two functions of the spinal cord are: The spinal cord is a set of nerves that are part of the Central Nervous System (CNS), which includes the brain. From the tailbone, the nerves branch out to the legs and feet.At that point, the cord’s fibers separate but continue into the lumbar region and eventually reach the tailbone.The spinal column of stacked vertebrae creates a hollow spinal canal through which the spinal cord runs from the brain to the first lumbar vertebra.The discs have two parts: the hard outside layer called the annulus and the softer center called the nucleus. Between the moveable vertebrae are intervertebral discs that serve as cushions for the bones. Since the first 24 vertebrae enable movement, they are the bones most often discussed. ![]()
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