Spinal Chord Flashcards
Spinal chord is located
Medulla to L2
CSF comes from
Brain
Spinal chord length and width
16-18 in
3/4 in
Cervical enlargement is located
C4-t1
Upper limbs, nerves to arms)
Lumbar enlargement located
T9 -t12 nerves to legs
Spinal nerves are ___
Mixed efferent/afferent
Conus medullaris is located
L1- L2 tip of spinal chord
Cauda equina are
Spinal nerves that hang off the end of spinal chord.
Pia mater clings to spinal chord and hangs off like a string tied to the coccyx
Filum terminale
Ventral groove (wide)
Anterior median fissure
Dorsal, shallow
Posterior median sulcus
Contains somas, Neuroglia , some unmyelinated axons, dendrites of inter neurons/ efferent (horns)
Grey matter
Mostly myelinated axons (columns)
White matter
Crossbar of (h) contains central canal
Gray commodore
Arises from 4th ventricle
Central canal
Connects anterior white matter
Anterior white composure
Grey horn
Somas of somatic, motor efferent neurons.
- voluntary muscle descriptions
Anterior (ventral) horns
Grey horn
Somatic, autonomic sensory (afferent) somas. (All sensory info).
Posterior (dorsal) horns
(T and L only) autonomic, motor efferent somas, involuntary muscle constructions!
Lateral horns
White columns
Posterior dorsal white columns
Anterior ventral white columns
Lateral white columns
Reflex, neuron link, afferent to efferent, neuron without brain involvement.
Inter neuron
Roots
Somas of sensory (afferent) neuron (PNS) unipolar ganglia
Posterior dorsal root
Roots
Motor(efferent) axon (CNS, multipolar)
Anterior ventral root
Spinal nerves Cervical Thoracic Lumbar Sacrum Coccyx
8, 12, 5, 5, 1
Destruction of ventral horn motor neurons
Poliomyelitis (polio)
Inflammation of a nerve
Neuritis
Progressive destruction of ventral motor horn neurons.
Amyotrophic lateral sclerosis (ASL)
Herpes zoster virus retreats to posterior root ganglia uses fast axonal transport to cause blisters)
Shingles
Areas of skin that have senses
Dematome
