Laminae of Rexed Flashcards
Lamina I (Dorsomarginal nucleus) contributes axons to what tracts?
Contributes to the spinothalamic tracts.
Lamina II (Substantia gelatinosa) contains hat structures?
What is special about these structures?
These have interneurons which play a role in the filtering of nociceptive transmission.
Aids in preventing over stimulation of the brain.
Lamina III and IV (nucleus proprius) contribute fibers to what tract?
These contribute to the spinothalamic tracts.
Laminae V (Neck of the dorsal horn) is involved in what functions?
Contains thick axon bundles and is less cellular with no listed function.
Laminae VI (Base of the dorsal horn) is involved in what functions?
Involved in the spinal reflexes withdrawing limbs from harmful stimuli.
Laminae VII (Intermediate zone of spinal cord) contains what specific nuclei and what spinal levels is it at?
Contains nucleus dorsalis (Clark’s column) located at C8-L3.
What do th neurons in Laminae VII recieve?
These guys receive centrall processes of pseudounipolar neurons that bring in position sense input from muscle spindles and GTOs.
Where is the origin of the spinocerebellar tract?
Originates in Laminae VII
The neuronal groups of the lateral gray columns belong to what lamina?
Laminae VII
The intermediolateral nucleus coresponds to what horn and contains what cell bodies?
Corresponds to the lateral horn.
Cell bodies of preganglionic sympathetic neurons in the T1-L2(3) spinal cord levels.
Where can the sacral parasympathetic nucleus be found?
Is a column containing the cell bodies of preganglionic parasympathetic neurons in the S2-S4 spinal levels.
What region of the ventral horn provides motor to acial muscles and which to limb muscles?
The medial region provides the axial muscles where as the lateral region contains motor neurons that innervate the limb muscles.
Which laminae contain motor neurons whose axons run in peripheral nerves to innervate the skeletal muscle?
Laminae VIII and IX.
The phrenic nucleus and the acessory nucleus are located in which laminae?
Located in the Lamina IX of the upper cervical spinal cord.
Which laminae is believed to be associated with the ANS?
Lamina X
