Preganglionic neurons for the sympathetic nervous system can originate from Select one: a. thoracolumbar region (T1 - L2) b. lumbar region only (L1-L5) c. cervical region only (C1-C7) d. craniosacral region (brainstem and S2-S4)
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The preganglionic neurons for the sympathetic nervous system originate from the spinal cord. The thoracolumbar region (T1 - L2) is the correct answer because the preganglionic neurons for the sympathetic nervous system originate from the spinal cord segments T1 Show more…
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The nervous system originates from the sides of which fold over to form the neural tube. The anterior end of this structure thickens to become the brain, while the posterior end remains tubular and becomes the spinal cord. The anterior end becomes folded because it cannot grow beyond the skull. The fluid-filled cavities within this structure are called ventricles and developing neurons in the layer adjacent to them. The neurons then migrate to other layers using structures called radial glial cells as guides. Eventually, they aggregate with other neurons with similar functions.
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