In a fly's brain, this filtering role is played by the lamina cells.In a fly's medulla, adjacent photodetectors are paired together, a time delay is introduced between the signals, and the two are then multiplied together.
For instance, the lateral reticular nuclei of the medulla oblongata cause a constant inhibition of input brought to the spinal cord by the nonmyelinated fibres.
All but the finest fibres are likely to possess a hollow central core, or medulla, resulting in low density, which makes the fibre fairly light in weight.
The medulla, which contains no germinal elements, exhibits no significant cyclical activity, is usually inconspicuous, is continuous with the dorsal mesentery, and, in cyclostomes, is hardly distinguishable from the latter.
Current thinking places these receptors near the undersurface (ventral part) of the medulla.
In the medulla the fibres of the cochlear nerve terminate when they reach a collection of nerve cells called the cochlear nucleus.
Following the proximal convoluted tubule is the loop of Henle, which descends into the medulla and then runs straight up again to the cortex where it continues as the distal convoluted tubule.
Vomiting is controlled by a vomiting centre located in the medulla oblongata of the brain stem.
The other main pathway of pain impulses ends in the reticular formation of the medulla oblongata and pons and is known as the spinoreticular tract.
Neurons of this group send axons out of the medulla in the ninth cranial (glossopharyngeal) nerve and to the otic ganglion.
Of the fibres that do not cross in the medulla, approximately 8 percent cross in cervical spinal segments.
