Rexed Laminae Flashcards
(25 cards)
What’s another name for Rexed Lamina II?
“Substantia Gelatinosa”
What lamina is the most anterior portion of the dorsal horn?
R.L. VI
What is the name of the fibers found in the cervical region?
“Formatio Reticularis”
“Reticular Formation”
Cell bodies called “Nucleus Proprius” are located in which Rexed Lamina?
R.L. III and IV
T/F? Lamina VII is found in the dorsal horn?
FALSE, Anterior/Ventral Horn
When the lateral horn is present (so the T1-T12 spinal cord levels), what lamina will it be found in?
R.L, VII
Many descending tract fibers synapse with neurons in what lamina?
R.L. VII
Which lamina surrounds the central canal?
R.L. X
What lamina is the most medial aspect of the ventral horn?
R.L. VIII
What nuclei will you find in lamina VII?
“Nucleus Dosalis”, “Clark’s Nucleus”, or “Clark’s Column”
Which lamina contains the terminal ventricle?
R.L. X
Lamina IX contains what type of neurons?
Class A Alpha-Motor Neurons
Which lamina is the reason that the ventral horn is called the “somatic motor horn”?
R.L. IX
Which lamina contributes to the posterior Spinocerebellar Tract?
R.L. VII (Clark’s Nucleus)
What lamina do pain fibers synapse in?
R.L. II (mainly)
Where is R.L. I found?
Thin cap over the dorsal horn of the grey matter.
What important area is found in R.L. II?
“Substantia Gelatinosa”
What group of cell bodies mostly fills R.L. III and IV?
Nucleus Proprius
In the cervical area, what complex of cell bodies are found in the lateral edge of R.L. V?
“Fromatio Reticularis”
What is unusual about R.L. VI?
Sometimes missing
In what part of the grey matter is R.L. VII found?
In the intermediate grey matter and lateral horn when present.
What two important nuclei are found in R.L. VII and at what cord levels are they present?
Clark’s nucleus (nucleus dorsalis) = C8-L3
Intermediolateral nucleus = lateral horn T1-L2, no horn S2-S4
The intermediolateral nucleus contains the cell bodies of what type of neurons?
Preganglionic, autonomic neurons
R.L. IX contains an abundance of what type of neurons?
Class A Alpha-motor neurons
