Spinal cord Flashcards
1
Q
Lamina 1
A
most dorsal
contains few large perikarya and many small and medium sized neurons
2
Q
Lamina 2
A
substansia gelatinosa
small neurons
3
Q
Lamina 3 and 4
A
Nucleus proprius
few large perikarya and many small/medium sized neurons
4
Q
Laminae 5,6 and 7
A
medium sized neurons with transverse orientation of the dendritic tree
in intermediate zone
5
Q
Lamina 8
A
large neurons
medial aspect of anterior horn
6
Q
Lamina 9
A
large motoneurons and many medium sized neurons
lateral aspect of anterior horn
7
Q
Lamina 10
A
grey matter around central canal
8
Q
Sensory fibers in dorsal root entrance
A
Medial bundle:
- majority cranially in dorsal funiculus
- ascending branches gives collaterals, terminate in lamina 3 and 4
- some to gracile and cuneate nucleus, some to Clarkes column
Lateral bundle:
- small caliber nerve fibers
- bifurcate and goes up and down in Lissauer tract
- collateral branches to lamina 1 and 2 and 5