tegmentum

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tegmentum

[teg′men·təm]
(anatomy)
A mass of white fibers with gray matter in the cerebral peduncles of higher vertebrates.
(botany)
The outer layer, or scales, of a leaf bud.
(invertebrate zoology)
The upper layer of a shell plate in Amphineura.
References in periodicals archive ?
In addition, it has been demonstrated that glutamate is an important neurotransmitter in the human cortex, given that it modulates dopamine activity in the ventral tegmental area, and thus exerts an impact upon the reward-related effects of dopamine on decision-making (Wolf, Numan, Nestler, Russell, 1999).
Parkinson's disease (PD) is a neurodegenerative disease, where the reduction of dopamine (DA) in the substantia nigra pars compacta (SNc)-striatal, ventral tegmental area (VTA)-cortex, and VTA-limbic pathways leads to the motor and nonmotor symptoms (NMS) of the disease.
It blocks the binding of endogenous and exogenous opioids at the receptors, particularly at the ventral tegmental area.
Involvement of CB1 receptors in the ventral tegmental area in the potentiation of morphine rewarding properties in acquisition but not expression in the conditioned place preference model.
Oxytocin injected into the ventral tegmental area induces penile erection and increases extracellular dopamine in the nucleus accumbens and paraventricular nucleus of the hypothalamus of male rats.
There are some important pathways in the brain that utilize dopamine other than just the nigrostriatal and tubuloinfindubular pathway, namely the mesocortical and mesolimbic pathways that link the ventral tegmental area of the midbrain to the prefrontal cortex and to the limbic area, respectively.
Brain maps reveal marked signal decreases bilaterally in multiple limbic and deep gray structures including the nucleus accumbens, amygdala, hypothalamus, hippocampus and ventral tegmental area.
This pathways is constituted by three critical brain areas, the ventral tegmental area (VTA), a neuronal group which releases dopamine when subjected to internal or external stimuli associated with addictive behaviour, the nucleus accumbens (NA), which receives dopaminergic signals from the VTA and the prefrontal cortex (PFC), directly connected to the VTA and indirectly connected to the amygdala.
Se ha propuesto que las alteraciones en este sistema son consecuencia de cambios extrinsecos que influyen en la liberacion de la dopamina a nivel del area tegmental ventral (ATV), la corteza prefrontal y el nucleo accumbens (26).
Previously, the dopaminergic neurons that take action over the rewarding system and are located in the ventral tegmental area were found to project fibres at the striatum Venti level (13).
Este paso inicial de aceptacion precede a la motivacion materna para desplegar conductas de proximidad, proteccion y cuidado hacia las crias, conductas que son facilitadas por la accion de la oxitocina sobre el area tegmental ventral, de la cual nacen las vias mesolimbicas dopaminergicas relacionadas con los aspectos motivacionales de la conducta materna.
BRAIN There are opioid receptors throughout the brain, including in the cerebral cortex, cerebellum, nucleus accumbens, ventral tegmental area, substantia nigra, and hypothalamus of the brain.