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Spinal cord (External anatomy (Intumescences (enlargements) = thickenings,…
Spinal cord
External anatomy
Intumescences (enlargements) = thickenings, origin of nerves supplying fore- and hindlimbs (swollen as more nerves in them. In cervical and lumbar regions
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Cauda equina (horse's tail) - Sacral nerve segments much higher than where exit. Form whisps of 'hairs' that travel down to where exit at sacral region
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Spinal nerves
Distribution:
- Branches
- Plexuses (vertebral origins)
Spinal nerve plexus
Dorsal and ventral branches of spinal nerves connect with neighbours to form continuous dorsal and ventral plexuses (networks)
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Foramen magnum
Large hole at base of skull, spinal cord passes through
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Internal anatomy
Spinal cord segment:
- Grey & white matter
- Spinal nerves
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