Integrative Analysis of the Biological Bases of Human Behavior

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Slide 1 – Title Slide

Header: Integrative Analysis of the Biological Bases of Human Behavior

Slide 2 – Introduction

Overview of taking a biopsychosocial approach to understand the complex factors influencing human behavior

Focus on contribution of biological systems and processes

Analysis examines psychobiological factors, focusing on addiction as a case study

Slide 3 – What is Psychobiology?

Interdisciplinary field integrating biological and psychological perspectives.

Examines how genetics, evolution, neurochemistry, neuroanatomy, physiology shape behavior

(Cacioppo & Freberg, 2016)

Slide 4 – Key Areas of Psychobiology

Genetics – gene variants linked to behavioral traits

Evolution – adaptive behaviors encoded genetically

Neurotransmitters – regulate cognition, mood, motivation

Neuroanatomy – specialized brain regions govern functions

Neuroendocrinology – hormones coordinate physiology & behavior

Neuroplasticity – neural connections change with experience

Slide 5 – Neurotransmitters & Behavior

Different neurotransmitters modulate diverse functions

Imbalances linked to psychological disorders

Examples: Dopamine, serotonin, acetylcholine, GABA, glutamate

(Jasinska et al., 2014)

Slide 6 – Brain Disorders & Behavioral Impact

Stroke, dementia, epilepsy, Parkinson’s, schizophrenia

Damage to specialized regions impairs associated functions

(American Psychiatric Association, 2013)

Slide 7 – Biological Factors in Addiction

Genetic vulnerabilities make some more addiction prone

Chronic drug use alters reward/motivation pathways

Enhanced craving neurocircuitry drives relapse

Executive function deficits perpetuate addiction cycle

(American Psychiatric Association, 2013)

Slide 8 – Genetic Predispositions

Twin studies show addiction is 40-60% heritable (Ducci & Goldman, 2012).

Specific gene variants linked to altered signaling & metabolism (Walters, 2002).

Heightened impulsivity, reward sensitivity in some

Slide 9 – Neural Adaptations in Addiction

Drugs overstimulate dopamine reward pathways

With repeated use, signaling dampens, tolerance builds

Motivation shifts from natural to drug rewards

(Volkow et al., 2016)

Slide 10 – Conclusion

Biology and psychology shape human behavior interactively

Psychobiology framework enables better understanding and treatments

Integrative approach key to addressing behavioral disorders

Slide 11- References

American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th ed.).

Cacioppo, J. T., & Freberg, L. A. (2016). Discovering psychology: The science of mind (3rd ed.). Cengage Learning.

Ducci, F., & Goldman, D. (2012). The genetic basis of addictive disorders. The Psychiatric Clinics of North America, 35(2), 495-519.

Jasinska, A. J., Stein, E. A., Kaiser, J., Naumer, M. J., & Yalachkov, Y. (2014). Factors modulating neural reactivity to drug cues in addiction: A survey of human neuroimaging studies. Neuroscience & Biobehavioral Reviews, 38, 1-16.

Volkow, N. D., Koob, G. F., & McLellan, A. T. (2016). Neurobiology advances from the brain disease model of addiction. New England Journal of Medicine, 374(4), 363-371.

Walters, G. D. (2002). Behavior genetic research on drug abuse and dependence: A review and update. The American Journal on Addictions, 11(1), 26-39.