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Spinal Nerve Roots

  • Two pairs of nerve roots extend from each segment of the spinal cord.
  • The image descriptionventral roots (anterior roots) allow motor neurons to exit the spinal cord.
Spinal cord segment cross-sectional image showing the sensory and motor nerves
Spinal cord segment cross-sectional image showing the sensory nerve, motor nerve and the ventral root
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  • The image descriptiondorsal roots (posterior roots) allow sensory neurons to enter the spinal cord.
Spinal cord segment cross-sectional image showing the sensory nerve, motor nerve and the ventral root
Spinal cord segment cross-sectional image showing the sensory nerve, motor nerve, the ventral and dorsal roots and the dorsal ganglion
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  • Along each dorsal root is small bulge called the image descriptiondorsal root ganglion (or spinal ganglion). Inside the ganglia are the cell bodies of the sensory neurons.
Spinal cord segment cross-sectional image showing the sensory nerve, motor nerve, the ventral and dorsal roots and the dorsal ganglion
Spinal cord segment cross-sectional image showing the sensory nerve, motor nerve and the ventral and dorsal roots
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  • The dorsal and ventral nerve roots fuse to form a image descriptionspinal nerve.
Superior View of the Thoracic vertebra showing the dorsal and ventral roots
Superior View of the Thoracic vertebra showing the dorsal and ventral roots and the spinal nerve
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Lateral view of the Thoracic vertebra
Lateral view of the Thoracic vertebra showing the Intervertebral foramen
Lateral view of the Thoracic vertebra showing the spinal nerve out of Intervertebral foramen
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Overview:

Image showing a spinal cord segment connected to the muscles with motor neuron and to the skin with sensory neuron without answers
Image showing a spinal cord segment connected to the muscles with motor neuron and to the skin with sensory neuron with labels for (1. Dorsal root ganglion, 2. Dorsal root, 3. Ventral root)
Image showing the spinal nerve out from the thoracic vertebra (Lateral view) without answers
Image showing the spinal nerve out from the thoracic vertebra (Lateral view) with answers (1.Dorsal root, 2.Spinal nerve, 3.Ventral root)
Image showing the spinal nerve out from the thoracic vertebra (Lateral view) without answers
Image showing the spinal nerve out from the thoracic vertebra (Lateral view) with answers, (1. Intervertebral foramen, 2. Spinal nerve)
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