Cauda equina refers to which of the following?

Cauda equina refers to which of the following?

• A. the part of the PNS that extends after CNS ends at L1
• B. the end of the CNS
• C. the end of the spinal cord
• D. a dorsal root ganglion

Answer: (A)

Cauda equina is the bundle of lumbar, sacral, and coccygeal nerve roots that extend downward beyond the end of the spinal cord inside the vertebral canal. The spinal cord typically ends around the level of L1–L2 (the conus medullaris), but these nerve roots continue to travel to exit at their respective levels. Since these roots are peripheral nerves, they are part of the peripheral nervous system. This distinguishes cauda equina from the end of the CNS (the conus medullaris) and from a dorsal root ganglion, which is a specific structure containing sensory neuron cell bodies along a single root. In short, the cauda equina is the lower nerve roots that persist below the spinal cord and become peripheral nerves.

Cauda equina is the bundle of lumbar, sacral, and coccygeal nerve roots that extend downward beyond the end of the spinal cord inside the vertebral canal. The spinal cord typically ends around the level of L1–L2 (the conus medullaris), but these nerve roots continue to travel to exit at their respective levels. Since these roots are peripheral nerves, they are part of the peripheral nervous system. This distinguishes cauda equina from the end of the CNS (the conus medullaris) and from a dorsal root ganglion, which is a specific structure containing sensory neuron cell bodies along a single root. In short, the cauda equina is the lower nerve roots that persist below the spinal cord and become peripheral nerves.