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A neurotransmitter is a chemical messenger that carries, boosts and modulates signals between neurons and other cells in the body. In most cases, a neurotransmitter is released from the axon terminal after an action potential has reached the synapse. The neurotransmitter then crosses the synaptic gap to reach the receptor site of the ...Read more
Yes: Yes, only dopaminergic neurons release dopamine, but there are several dopaminergic pathways in the brain. Dopaminergic neurons in midbrain are the main source of Dopamine in the mammalian cns. Losing these is associated with parkinson's disease. Dopamine neurons are involved with voluntary movement and other behavioral processes such as mood, reward, addiction, psychosis, and stress. ...Read more
Since there's deep brain stimulation that stimulate neurons, is there deep brain "inhibition" that inhibits neurons?
Yes: It is interesting that it is called " stimulation", in fact it inhibits the neuron depending upon the degree of stimulation applied. For example the involuntary movement of Parkinson's disease are controlled by "inhibition". Similarly " interstim" is the technique to stimulate to cause inhibition of bladder contractions to cure loss of urinaty control. The entire process is well understood. ...Read more
How does dopamine and serotonin (chemically) reduce fear/anxiety in de brain? prefrontal cortex or amygdala? Or which parts of brain is involved?
Neurotransmitters: Medicines like Zoloft/Lexapro are serotonin reuptake inhibitors. Wellbutrin (bupropion) inhibits the uptake of norepinephrine and dopamine. Whether it is anxiety, irritability, anger, short fuse, or depression; these medicines regulate neurotransmitters in the brain to improve symptoms of insomnia, guilty feelings, poor concentration, fatigue, appetite disturbance, and lack of drive/interests. ...Read more
Serotonin: They are all neurotransmitters.Get a more detailed answer ›
Everywhere: Both are found throughout the brain, but more common in the limbic or emotional part of the brain ...Read more
Depends on type: The type and location of the brain tumor may affect other body systems. For example, a pituitary tumor is a classic tumor that arises in the pituitary fossa. It can have profound effects on the endocrine system as it diplaces normal pituitary function. If the tumors are endocrine active-it can afffect growth or blood pressure. Tumors near motor areas can affect the musculoskeletal system. ...Read more
Do you have one?: Have you been diagnosed with a pituitary tumor? I suppose it's possible for a pituitary tumor to cause those symptoms, e.g. secondary hypothyroidism; but usually there are also physical symptoms. If you mean a BIG GROWING tumor, you shouldn't have that without also developing a bitemporal hemianopsia and walking into doorposts and walls. Why does this in particular worry you? ...Read moreSee 1 more doctor answer
ACH synthesis brain: Ach in the brain is produced from acetyl-coa (from glucose metabolism) & from choline, which is actively transported across blood-brain barrier. Most dietary choline comes from phosphatidyl choline (major phospholipid in membranes of plants&animals) acetyl-coa & choline are independently synthesized in neuron cell body & transported along axon to synapse where they are joined into acetylcholine. ...Read more
Hard to say...: Dopamine (DA) is not measured in clinical labs. It's extremely rapidly metabolized along a variety of pathways. Further, DA levels in blood bear little resemblance to DA activity in the brain - even less to the small brain regions and synapses where DA signaling is concentrated. Though DA *might* be relevant, the symptoms you describe could have a very large number of non-DA causes. ...Read more
NO!!: Seizures are a reaction of irritated cells of the brain. When these cells seize their need for oxygen and glucose goes way up. If given good support they recover nicely. If poorly managed, damage can occur. Many epilepsy patients suffer repeated seizures but are entirely normal between seizures. ...Read more
Some do, some don't: A lot depends on the location of the tumor, it's size, the swelling around it, which fiber tracks are blocked and chemicals emitted from the tumor, as well as the person's psychological reaction to having a brain tumor, family support, accurate and timely treatment, etc. ...Read more
GABA receptor: Like many ligands, gaba binds to its specific receptor, the gaba receptor (with several subtypes). Depending on the location of the gaba receptor, binding of gaba modulates various signaling pathways in the body. Note that gaba receptors are also found in organs outside of the brain. ...Read more
Well-many: This is a complex question, and the answer is many. The number of receptors for both of these are throughout the brain and body and are controlled by different biochemical processes which trigger excretion, secretion, reuptake, and distribution. There are different types of serotonin and dopamine receptors throughout the systems. ...Read more
Depends on situation: Mental performance will be at its best when a person is well rested, well fed, not ill and in a comfortable setting. Sleep deprivation causes a predictable decline in performance. To this extent, naps that help one catch up with a sleep deficit will be helpful. Most mature adults can function well on 7-8 hours of sleep/24h. Performance in excess of capability is unlikely due to extra sleep. ...Read more
Can an autoimmune disease effect our nerves, brain cells , neurons, and part of our brain, so we lose our emotions feelings, empathy, inhibitions, ?
Possible: It all depends on the kind of autoimmune disease and place of involvement. For instance, lupus could cause cerebritis ie brain inflammation and even could go as far as causing coma. But lupus could be only localized to other places like causing kidney disease, lung diseases, skin disease, or arthritis. ...Read more
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