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NBCE Part 1
Organization of Gray matter
9
Health Care
Professional
07/05/2012

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Term
thin layer beneath dorsolateral fasciculus of lissauer, neurons synapse with 1st order nuerons & send axons to contralateral spinothalmic tracts
Definition
Lamina I
Term
Substance P, a neuropeptide involved in pain sensibility is found in high concentrations in:
Definition
Lamina I & II
Term
Made of small neurons, some will respond to noxious stimuli including the C fibers (AKA Substantia Gelatinosa of Rolando)
Definition
Lamina II
Term
referred to as nucleus proprius, maininput is from fibers that carry mechanoreceptors and light touch
Definition
Lamina III & IV
Term
Neurons respond to both noxious and visceral afferent stimuli
Definition
Lamina V
Term
Deepest layer of the dorsal horn, receives mechanical signals from skin and joints
Definition
Lamina VI
Term
Contains dosal nucleus (Clarke's Column) & intermediolateral horn or nucleus, carries unconscious proprioception
Definition
Lamina VII
Term
represents motor nueron groups in the ventral horn
Definition
Lamina VIII & IX
Term
Known as the Gray Commissure, is the smallest area of gray matter surrounding the central canal of the spinal cord
Definition
Lamina X
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