Spinal Cord and Spinal NervesExplain spinal cord anatomy, including gray and white matter and meninges (give the general functions of this organ).
Discuss the structure and functions of the spinal nerves and plexuses.
Describe the structural components of reflexes. Resides inside vertebral canal
Extends to L1/ L2
31 segments, each associated with a pair of dorsal root ganglia
Two enlargementsAdult spinal cord: 1. Cervical EnlargementGray matter expanded to incorporate more sensory input from limbs and more cell bodies for motor control of limbs Spinal Meninges3) Pia mater2) Arachnoid1) Dura materThree membranes surround all of CNS
1) Dura mater - "tough mother", strong
2) Arachnoid meninx - spidery looking, carries blood vessels, etc.
3) Pia mater - "delicate mother", adheres tightly to surface of spinal cord Inferior End of Spinal CordConus medullaris - inferior end of spinal cord proper
Cauda equina - individual spinal nerves within spinal canal
Filum terminale - filamentous end of meninges, "tie-down" Lumbar Puncture (= Spinal Tap)For clinical examination of CSF or administration of radiopaque dyes, drugs and sometimes anesthetics
However: mostly “epidurals” for anesthetics L3L4 ...