Quotes About Amygdala

Moreover, sustained stress and glucocorticoid exposure enhance LTP and suppress LTD in the amygdala, boosting fear conditioning, and suppress LTP in the frontal cortex. Combining these effects—more excitable synapses in the amygdala, fewer ones in the frontal cortex—helps explain stress-induced impulsivity and poor emotional regulation.

LeDoux and others have shown how auditory information about the tone stimulates BLA neurons. At first, activation of those neurons is irrelevant to the central amygdala (whose neurons are destined to activate following the shock). But with repeated coupling of tone with shock, there is remapping and those BLA neurons acquire the means to activate the central amygdala.fn16

Thus, shorter refractory periods mean a higher rate of action potentials. So is testosterone causing action potentials in these neurons? No. It's causing them to fire at a faster rate if they are stimulated by something else. Similarly, testosterone increases amygdala response to angry faces, but not to other sorts.

In other words, the default state is to trust, and what the amygdala does is learn vigilance and distrust.

Once we start believing that the apocalypse is coming, the amygdala goes on high alert, filtering out most anything that says otherwise.

The amygdala is one of those brain structures that a lot of people know a little bit about, and there's a definite tendency to conflate the amygdala and the fear response itself - as if the amygdala, and the amygdala alone, 'causes' fear.

Successful therapists learn to be 'amygdala whisperers' by leveraging the social brain in order to help clients face their fears.

As discussed earlier, an important remnant of our evolutionary past, the amygdala, rests at the core of the brain. This ancient executive center has retained veto power over our modern cortical executive centers when it detects a threat.

slowly, meditation gives our amygdala a chance to make more calm and measured assessments of situations.

We've done fMRI scans of people taking the 'Reading the Eyes' test, and what we've found is that the amygdala lights up in trying to figure out people's thoughts and feelings. In people with autism, they show highly reduced amygdala activity.

Humans evolved in a world where nothing moved two thousand miles an hour, so there was no reason for the body to be able to counter that threat, but the brain still had to stay ahead of the game. Neurological processes in one of the most primitive parts of the brain, the amygdala, happen so fast that one could say they compete with bullets.

In the context of stress, the great paradox of the modern age may be that there is not more hardship, just more news—and too much of it. The 24/7 streaming torrent of tragedy and demands flashing at us from an array of digital displays keeps the amygdala flying.

Fear was not a familiar sensation, and this fear-stranger-fear of the unknown-even less so. Among the legacies of atavism corrected by rightminding was the overactive fear response of the human amygdala to anything foreign or strange.

Emotional life grows out of an area of the brain called the limbic system, specifically the amygdala, whence come delight and disgust and fear and anger.

Alex Korb writes in "The Grateful Brain," "Gratitude can have such a powerful impact on your life because it engages your brain in a virtuous cycle. Your brain only has so much power to focus its attention. It cannot easily focus on both positive and negative stimuli." Literally, you can't be grateful and anxious at the same time. Once again, the threat system in our amygdala is overridden.

Researchers at the University of Iowa have for years been studying a woman, known in the literature as S.M., whose amygdala was destroyed by a rare disease—and who cannot, as a consequence, experience fear.)

Meditation led to decreased density of the amygdala, a physical change that was correlated with subjects' self-reported stress levels—as their amygdalae got less dense, the subjects felt less stressed. Other studies have found that Buddhist monks who are especially good at meditating show much greater activity in their frontal cortices, and much less in their amygdalae, than normal people.n Meditation and deep-breathing exercises work for

The very best meditators seem even to be able to suppress their startle response, a rudimentary physiological reaction to loud noises or other sudden stimuli that is mediated through the amygdala. (The strength of one's startle response—whether measured in infancy or adulthood—has been shown to be highly correlated with the propensity to develop anxiety disorders and depression.)

Once you can identify an enemy, reactivate a chosen trauma and unite all factions in fear and hate of a common threat, you activate the most primitive part of the brain, the amygdala with its instant and overwhelming defensive reactions, and render a culture susceptible to a pure and powerful dualism in which you are the innocent party and violence becomes both a justified revenge and the necessary protection of your group. The threefold defeat of morality then follows.

Before we can solve the problem of stress and anxiety, we have to look at one final actor––and the critical role it plays in setting you up for stress. It's your hidden alarm system; it's called the amygdala.

Imagine, then, what happens when your over-active amygdala teams up with your overly-negative self-talk. When it does, all bets are off. Suddenly, it's mental chaos! The alarm bells are clanging and your self-talk goes into total negative and makes everything triple-worse. You are no longer in control. Even good things look bad. Promise and hope fly out the window. The only thing left in the room is tension and panic––and your stress level goes through the roof!

Results showed that areas of the brain linked with emotion and empathy (the cingulate cortex and the amygdala) were less active during violent video gaming . . . These areas must be suppressed during violent video gaming, just as they would be in real life, in order to act violently without hesitation.

It's a trick, of course. That thing the neuro-crowd has been doing to music lately, the trigger buried in the rhythm. It fires up the amygdala, a dash of flight-or-flight to create hyper-salience, hippocampal overactivation for enhanced recall, more Big Brother kind of shit. "Direct-to-memory" is how they describe it. Singing in public was his experience.

The amygdala plays an important role in the acquisition, storage, expression, and extinction of threat memories. The ventromedial prefrontal cortex (PFCVM) regulates the acquisition, storage, expression, and extinction of threat memories by the amygdala. The hippocampus learns about the context of acquisition and modulates the expression and extinction of threat memories in relation to context.