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I created this blog as an instrument of what I have encountered in the world of veterinary medicine as a proud vet student. Comments and suggestions are welcome here at;

sweet_daffodil90@yahoo.co.uk

Regards,
Aina Meducci 2012

Disclaimer

The following blog posts is not genuinely from my research but through readings and citation from trusted website. I do not own any of the copyright and therefore you may use it at your own risk

SINCE I AM NOT A VETERINARIAN YET, THEREFORE I CAN'T CONSULT ANY MEDICAL ADVICE TO YOU AND YOUR PETS! EXTREMELY IMPORTANT!.

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Just a brief.. explanation (adrenal medulla)

All these while, I was wondering why the adrenal medulla only has direct stimulation (PREganglionic neuron) from the brain (CNS) without having POSTganglionic neuron when transmitting impulses unlike other organs.

Look at the figure below



Only PREganglionic neuron transmitting impulses to adrenal medulla (sympathetic)



Why?? so here is the answer


Medullary cells are derived from the embryonic neural crest and, as such, are simply modified neurons.In particular, they are modified postganglionic cells of the sympathetic nervous system that have lost their axons and dendrites, receiving innervation from corresponding preganglionic fibers. Moreover, as the synapses between pre- and postganglionic fibers are called ganglia, the adrenal medulla is actually a ganglion of the sympathetic nervous system.


Sources: Lecture notes and wikipedia



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