List of Muscles. Neurological Control - Neurotransmitters. Neurotransmitter Molecules Neurotransmitters can be broadly split into two groups – the ‘classical’, small molecule neurotransmitters and the relatively larger neuropeptide neurotransmitters. Within the category of small molecule neurotransmitters, the biogenic amines (dopamine, noradrenaline, serotonin and histamine) are often referred to as a discrete group because of their similarity in terms of their chemical properties.
Click on the links in the table above to read more about some of the important neurotransmitters. Serotonin Although the CNS contains less than 2% of the total serotonin in the body, serotonin plays a very important role in a range of brain functions. It is synthesised from the amino acid tryptophan. Within the brain, serotonin is localised mainly in nerve pathways emerging from the raphe nuclei, a group of nuclei at the centre of the reticular formation in the Midbrain, pons and medulla. Noradrenaline Find out more about noradrenaline and serotonin Dopamine Acetylcholine. If you reload an inkjet cartridge with human cells, can you print skin? YES! : bioephemera. Artificial Anatomy | Body Parts. Doctors Restart Dead Heart.
SCIENTISTS have told how they were left "speechless" when they brought a dead heart back to life. They stripped the organ of its cells and added stem cells before it started pumping again more than a week later. They hope it will help overcome the problem of organ transplant rejection. Harald C. Ott, of Massachusetts General Hospital, said: "When we saw the first contractions, we were speechless. "We just took nature's building blocks to build a new organ. " His team took a dead rat's heart and stripped it of all its cells, leaving only the essential structure of chambers, valves and the blood vessels. They added stem cells from baby rats and placed the organ in a laboratory. Four days later, it began contracting. The experiment could open a new field of heart repair.
Surgeons could take a donated dead organ, renew it with the patient's own cells and then patch it on to a damaged heart. It would overcome the dangers of rejection because the body will not reject its own cells. BRAINMAPS.ORG - BRAIN ATLAS, BRAIN MAPS, BRAIN STRUCTURE, NEUROINFORMATICS, BRAIN, STEREOTAXIC ATLAS, NEUROSCIENCE. The Endocrine System.