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Cell group B9 is a group of cells located in the pontine tegmentum, ventral to serotonergic group B8. In the nonhuman primate they are found in the ventral part of the superior central nucleus and adjacent structures. [3] In the rodent they have a more lateral location within the medial lemniscus of the pons and dorsal and medial to it., [4] [5]
Serotonin (/ ˌ s ɛr ə ˈ t oʊ n ɪ n, ˌ s ɪər ə-/) [6] [7] [8] or 5-hydroxytryptamine (5-HT) is a monoamine neurotransmitter.Its biological function is complex, touching on diverse functions including mood, cognition, reward, learning, memory, and numerous physiological processes such as vomiting and vasoconstriction.
Serotonin pathways are thought to modulate eating, both the amount as well as the motor processes associated with eating. The serotonergic projections into the hypothalamus are thought to be particularly relevant, and an increase in serotonergic signaling is thought to generally decrease food consumption (evidenced by fenfluramine , however ...
The MRN is involved in the serotonin pathway. [3] Serotonin (5-HT) is the chief neurotransmitter of the median raphe nucleus. [4] According to one study, it represents the main source of serotonin (5-hydroxytryptamine (5-HT)) in the brain. [3] Stimulation of the MRN significantly increases the amount of 5-HT present in the brain. [5]
The 5-HT 1B receptor as an example of a metabotropic serotonin receptor. Its crystallographic structure in ribbon representation. 5-HT receptors, 5-hydroxytryptamine receptors, or serotonin receptors, are a group of G protein-coupled receptor and ligand-gated ion channels found in the central and peripheral nervous systems.
These triangular multipolar neurons exist in two sub-populations in the VLPO: Type 1 – inhibited by serotonin. Type 2 – excited by serotonin and adenosine. As adenosine accumulates during wakefulness [12] [17] it is likely that type 2 cells play a role in sleep induction. The remaining third of neurons in the VLPO are excited by norepinephrine.
A marble sculpture bought for $6 and used as a doorstep could be about to make a fortune. The bust, made by French sculptor Edmé Bouchardon, could make over $3 million at auction after a local ...
Typically, neurotransmitter receptors are located on the postsynaptic neuron, while neurotransmitter autoreceptors are located on the presynaptic neuron, as is the case for monoamine neurotransmitters; [45] in some cases, a neurotransmitter utilizes retrograde neurotransmission, a type of feedback signaling in neurons where the neurotransmitter ...