Ντοπαμίνη - ικανοποίηση. the reward circuit nucleus accumbens ventral pallidum ventral tegmental area and amygdala

Ντοπαμίνη - ικανοποίηση. the reward circuit nucleus accumbens ventral pallidum ventral tegmental area and amygdala

ventral tegmental  area

ventral tegmental area

Ketamine blocks glutamate NMDA receptors in the brain. Increases brain-derived neurotrophic factor (BDNF, important for long-term memory and the creation of new synapses) and restores healthy mushroom-shaped spines on the dendrites of neurons in the prefrontal cortex.  It may also affect the monoamines norepinephrine (NE) and dopamine. In rats, increased the firing rate of NE neurons in the locus coeruleus and also increased spontaneous firing dopamine cells in the ventral tegmental area.

Ketamine blocks glutamate NMDA receptors in the brain. Increases brain-derived neurotrophic factor (BDNF, important for long-term memory and the creation of new synapses) and restores healthy mushroom-shaped spines on the dendrites of neurons in the prefrontal cortex. It may also affect the monoamines norepinephrine (NE) and dopamine. In rats, increased the firing rate of NE neurons in the locus coeruleus and also increased spontaneous firing dopamine cells in the ventral tegmental area.

Ventral Tegmental Area (VTA) is the area that synthesizes dopamine, which then sends to nucleus accumbens. Nucelus accumbens is the pleasure center, and it is stimulated by the neurotransmitter dopamine from VTA. VTA also sends dopamine to prefrontal cortex which regulates and controls these impulses. The locus coeruleus is the area packed with norepinephrine; and when stimulated by a lack of the addictive substance, will drives the person to do anything necessary to obtain a fix.

Ventral Tegmental Area (VTA) is the area that synthesizes dopamine, which then sends to nucleus accumbens. Nucelus accumbens is the pleasure center, and it is stimulated by the neurotransmitter dopamine from VTA. VTA also sends dopamine to prefrontal cortex which regulates and controls these impulses. The locus coeruleus is the area packed with norepinephrine; and when stimulated by a lack of the addictive substance, will drives the person to do anything necessary to obtain a fix.

From Knowing Neurons blog. MRI scan showing in red the ventral tegmental area (VTA), a collection of cells that provide one of the main sources of dopamine.

From Knowing Neurons blog. MRI scan showing in red the ventral tegmental area (VTA), a collection of cells that provide one of the main sources of dopamine.

WELL CONNECTED  Neurons (green) in the lateral hypothalamus connect with those in the ventral tegmental area of mice’s brains to contribute to compulsive sugar consumption.  ~~ Courtesy of Edward Nieh/MIT

Newly identified brain circuit could be target for treating obesity

WELL CONNECTED Neurons (green) in the lateral hypothalamus connect with those in the ventral tegmental area of mice’s brains to contribute to compulsive sugar consumption. ~~ Courtesy of Edward Nieh/MIT

The major dopamine pathways in the brain are involved in motor control, motivation, and reward. Dopamine neurons in the ventral tegmental area (VTA) project to the frontal cortex, nucleus accumbens, and other areas, and these neurons play an important role in motivation and reward. Motor control is governed by dopamine pathways from the substantia nigra to the striatum.

The major dopamine pathways in the brain are involved in motor control, motivation, and reward. Dopamine neurons in the ventral tegmental area (VTA) project to the frontal cortex, nucleus accumbens, and other areas, and these neurons play an important role in motivation and reward. Motor control is governed by dopamine pathways from the substantia nigra to the striatum.

The ventral tegmental area (VTA), a group of neurons at the very centre of the brain, plays an especially important role in this circuit. The VTA receives information from several other regions that tell it how well various fundamental needs, and more specifically human needs, are being satisfied.

The ventral tegmental area (VTA), a group of neurons at the very centre of the brain, plays an especially important role in this circuit. The VTA receives information from several other regions that tell it how well various fundamental needs, and more specifically human needs, are being satisfied.

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