What Builds or Breaks Down the ‘Biology’ of Resilience?

The Dalgarno Institute, as a health education charity, has a long history of conducting insightful evidenced and outcome-based seminars on the health, mental health and the psycho-social impact of Alcohol and Other Drugs (AOD).

A series of seminars aimed at secondary school cohort and beyond, opened up journeys into what is often overlooked in the bio-behavioural influencing nature of substance use, and the importance of well-developed agency and capacity that a healthy resilience building environments can develop.

Of course, this journey of discovery also includes that which is not only undermining of such resiliency, but a wrecking ball to it.

One question that prefaces these learning journeys is the following.

Are we engaging in Exploration and Reward or Experimentation and Rebellion?

We were designed for the former two, but the later – experimentation and rebellion – are simply aggressively culturally marketed counterfeits of the best practice informative-priors. These counterfeits are often promoted as, ‘rebellion is just part of growing up’ or ‘pursing freedom’ or ‘make your own road – damn everyone else’ mantras that don’t lead to anything positive they claim to promote.

The Science

Recent neuroscience reveals how adolescent alcohol, and addictive substance use fundamentally alter decision-making and emotional resilience by corrupting the brain’s dopamine signalling and reward learning pathways. The following is but a synoptic overview of the referenced research to act as a primer for  you to pursue a more complete understanding of this oft-ignored space.

Adolescent Alcohol and Risk Signalling: A history of adolescent alcohol consumption causes long-lasting changes in how the brain—which relies on dopamine for motivation and learning—processes risk. Instead of altering the experience of reward, alcohol exposure during this critical period disrupts how the brain encodes costs related to risky choices. This “corruption of cost encoding” means that those with adolescent alcohol use are more likely to make riskier decisions, as their brain undervalues potential negative consequences while still responding normally to rewards. The result is a bias toward short-term benefits at the expense of long-term wellbeing.

The Amygdala: Emotional Arrest and Substance Use Memory – The amygdala is pivotal for storing emotional memory, particularly those related to drug use. When a person experiences the intense stimulation of a drug, the amygdala in effect “arrests” or severely disrupts emotional development. This sets the amygdala as the brain’s “go-to” hub for recall of emotionally salient drug cues, making it difficult to form healthier emotional associations or escape addictive cycles. Regardless of cognitive development in a drug using individual, the ‘arrested’ emotional development manifests all too often in stressful or agenda interrupting situations. For example, you may be dealing with a 38 year old seemingly competent worker, supervisor or even partner, but poor impulse control, inability to delay gratification and externalising blame (to name just a few) that sound like bratty 14-year-old, manifest and actions decisions bounce out of that space. This may often be one indication of the timing of the first drug use – i.e. 15 years of age.

It’s a Cellular Thing.

Reward Encoding: Granule Cells and the Power of Learning: Some of this latest research reveals that the granule cells in the brain, over 60 billion of them, can be encoded by reward responses, not just the anticipated rewards either. Unexpected rewards in recent experiments, saw increases in reward response, thus driving greater ‘cellular need’ for reward.

Cerebellar granule cells encode the expectation of reward Granule cells in the cerebellum—among the brain’s most numerous neurons—encode both the anticipation and surprise of reward. These cells are “tuned” by learning, especially through experiences that require effortful action or delay of gratification. Notably, the increased cellular response following unexpected rewards demonstrates the brain’s drive to pursue new or unpredictable positive outcomes.

But what is vital to understand it that only active, engaged learning (not passive or shortcut-driven stimulation) strengthens these neural pathways for healthier decision-making and resilience – Walking back out of this is a process, not an event. That is also why most drug-use recovery programs essentially revisit all the basic principles of prevention that were perhaps ignored in the first place, leading to substance use engagement.

Dopamine and the Trap of Shortcuts: Dopamine is best understood as the motivation chemical—not just a signal for pleasure, but a driver for purposeful, effortful action. Achievements that require sustained effort (like exercise, mastering a skill, or building relationships) build resilience because they anchor dopamine release to meaningful growth – In other words they have ‘meaningful context’ not just a ‘process’.

In contrast, addictive substances and behaviours hijack this system by providing dopamine rewards without corresponding effort or learning—creating a cycle of craving that undermines the ability to delay gratification and pushes the ‘I need it now’ button big time.

It erodes the brain’s ability to wait for real rewards, engage in healthy risks, or withstand setbacks.

Coming Back from this

Not unsurprisingly it requires active, not passive, recalibration of the brain through behaviour change. As alluded too previously, it’s not a ‘chemical quick-fix’, but a bio-behavioural rework that takes, time, intentionality and deliberate action. Frameworks for this recalibration are therefore needed to aid this rebuilding of the chemically broken brain and cellular colonisation by substances.

A New ‘diet’ is needed for the whole human unit

Emotionally: New, in-situ and real-life environmental resources, such as caring supportive relationships that value more than ‘sensate’ gratification. Purpose and priorities that invest in others, not just the self. Reward over rebellion

Physically: Nothing new here – exercise, or good old-fashioned physical work. Healthier food and remembering – always – sugar is NOT your friend.

Spiritually: Exploring real meaning, yes including new moral/ethical frameworks for conduct that set baselines for behaviour change and roadmaps to it.

A Core Principles Snapshot

• Early substance use disrupts risk assessment and cost evaluation in the developing brain, promoting riskier behaviour patterns.
• Addiction locks emotional memory in the amygdala, stalling emotional development and resilience.
• Healthy reward learning requires exploration, effort, and delayed gratification, setting up neural networks for adaptive decision-making and emotional stability.
• Dopamine obtained through effort builds authentic motivation and resilience; “shortcut” dopamine undermines these capacities, increasing vulnerability to addiction and poor decision-making.
• Recalibration cannot be a short-cut; it requires new environmental pathways, not just neuropathways.

This research underscores that prevention and recovery must focus not just on reducing access to drugs, but on rebuilding the brain’s link between effort and reward—the foundation of resilience, agency, and lifelong well-being. This, as we have only touched on here, is far more holistic than many have realised, or perhaps more accurately, many have forgotten.

Shane Varcoe – Executive Director, Dalgarno Institute