Skip to main content

Verified by Psychology Today

Dopamine

Remembering Robin Williams and Why Clowns Cry

Beneath the laughter and beyond the tears

This post is in response to
Robin Williams and the Mask of Humor

I met Robin Williams at Paramount Studios back in the early 80’s. He was wild, funny, and very kind. From time to time, I would see him at parties around town. There were cocaine issues in Hollywood back in those days. Well there was cocaine, and the only issues were running out, finding an ATM, and having a coke dealer who delivered. It’s funny how Hollywood is. In the early '80s, cocaine was the thing. Then towards the latter part of the decade, getting clean and sober was the thing. Some people stayed clean and sober, others of us went back out with different addictions.

Understanding Addiction

At the end of the day, addictions are just habits that began as goal directed (G/D) behaviors in the prefrontal cortex (PFC), or ventral striatum that became stimulus response (S/R) behaviors in the dorsal striatum, because of repetition.1-7

When the ventral striatum generates a goal-directed behavior, i.e. I want to do this to get that (e.g. turning on a light switch in a dark room) dopamine (the brain’s happy dance drug) releases in the mesolimbic pathway (the brain’s Reward Freeway).8-12 When a G/D behavior comes from the ventral striatum, it makes the dorsal striatum more likely to repeat the action than if it comes from the PFC. 12-17This is why you cannot think your way out of an addiction. The PFC, or thinking part of the brain, just does not have the dopamine firepower the ventral striatum has. The ventral striatum is in the old non-thinking survival-first part of the brain, where the mantra is “do it now, ask questions later”.18-22 So, what this part of the brain lacks in cognition, it makes up for in dopamine.

In addition, both the ventral and dorsal striatum release dopamine, although they utilize it differently, serving different purposes in the brain. In the dorsal striatum, dopamine initiates action, but in the ventral striatum, it signals reward.12,16,23-26 Thus, dopamine release in the ventral striatum makes you want to do something because you anticipate the reward of doing it. Evolution invested more dopamine in making us want to do something than in actually doing it because getting us to want to do something is essential to our doing it. Once we are doing it, the game is over. 27-31So, people do not realize that addiction is deconstructing their lives because a) wanting to do it is what feels good, not doing it, and b) repetition turns a goal directed behavior of, “I want A so I do B” into a S/R behavior of when I see A I do B. It is like walking into a room, knowing the bulb is out, yet you flip the light switch out of habit. Walking into a dark room is the stimulus, flipping the switch is the response. Once thought is taken out of the process the response becomes a habit.

So in terms of Robin William’s struggle with addiction, I get it. No, I did not know him well, and hadn’t seen him in years, but I know addiction very well and see it every day. This I know. It takes no prisoners, and it does not know uptown from down, famous from obscure, rich from indigent, no races, no nations, and no political affiliations. It does not matter how successful you are, who loved you and how much. Addiction is highly individualized and your brain does the best it can: end of story. 32-35

Addiction and Depression

Addiction and depression are like booger sugar and hairless nostrils. Where you find one, you find the other.36-41 Until recently scientist thought that there was a neurochemical basis for major depressive disorders. However, we are learning that major depressive disorders are associated with reduced regional volumes in the Central Nervous System (CNS).42-46 Studies have also found that fewer and smaller glia cells, as well as neurons, in discrete brain areas are associable to major depressive disorders.44

This is new science, and we have not fully articulated the precise structural and functional changes in the brain and the Central Nervous System that cause major depressive disorders. However, think about it like this. Glia cells are involved in myelination. Myelination is like the rubber casing around wires. You know what happens when the wire casing gets compromised and an electrical wire is exposed. Likewise, you also know what happens when the wires are too small to carry the current.

I know depression intimately. It is like Seattle, or Dublin in October… rainy, and dreary. It wefts in and out, like the fog over the rooftops of Dublin, and hangs heavily on your spirit like a firmament that dampens your soul. More importantly, depression is not a weather condition for some people. For some people it is a climate. The recent findings regarding compromised brain and CNS volumes, along with reduced cell numbers, and smaller sized cells and diminished functionality support the climate theory, more so than a weather condition that can be avoided or zapped with pharmaceuticals like farmers seeding clouds.

What should we take from Robin Williams’ death? This: struggles with addiction and depression are not about who you are, what your character is like, or what your life is like, but merely about what your brain can and cannot endure, and for how long. Robin Williams’ life gave us tremendous joy; its punctuation gave us tremendous sorrow. But life is driven by a differential engine, and without sorrow, joy would have no value. Thus, maybe in that small way his death complimented his life, in that it was extraordinary, albeit, extraordinarily sad. He had his struggles with addiction like many of us, and depression swept over him, as it does many of us. The lesson there: like you know there is a sun, even though it is raining; like you believe in love even if you cannot feel it; on days like this, you must trust the Universe, even though you cannot understand what it is, or why it is, the Universe is doing, what She is doing. Remain fabulous and phenomenal.

Click here to receive notices of new post via email

Come visit UCLA’s Center for the Neurobiology of Stress Obesity Program

Click here to visit me at UCLA Center for the Neurobiology of Stress

Click here to like Obesely-Speaking of FaceBook

Click her to visit me on The Huffington Post

Click here for the Billi Club (Billi Gordon Fan Page)

Click here to follow me on Twitter

Click here and find something surprising

Click here to visit Dr. Gordon Online

Click here for Google Plus

Images: Free license (Google) unless otherwise noted

References

1. Clemens KJ, Castino MR, Cornish JL, Goodchild AK, Holmes NM. Behavioral and Neural Substrates of Habit Formation in Rats Intravenously Self-Administering Nicotine. Neuropsychopharmacology. May 14.

2. Xie K, Martemyanov KA. Control of striatal signaling by g protein regulators. Front Neuroanat.5:49.

3. Wise RA, Koob GF. The development and maintenance of drug addiction. Neuropsychopharmacology. Jan;39(2):254-62.

4. Yin HHPD. From Actions to Habits: Neuroadaptations Leading to Dependence. Alcohol Res Health. 2008 Sep;31(4):340-7.

5. Di Filippo M, Picconi B, Tantucci M, et al. Short-term and long-term plasticity at corticostriatal synapses: implications for learning and memory. Behav Brain Res. 2009 Apr 12;199(1):108-18.

6. Konova AB, Moeller SJ, Tomasi D, et al. Structural and behavioral correlates of abnormal encoding of money value in the sensorimotor striatum in cocaine addiction. Eur J Neurosci. Oct;36(7):2979-88.

7. Michaelides M, Thanos PK, Volkow ND, Wang GJ. Translational neuroimaging in drug addiction and obesity. ILAR J.53(1):59-68.

8. Nelson A, Killcross S. Amphetamine exposure enhances habit formation. J Neurosci. 2006 Apr 5;26(14):3805-12.

9. Alcaro A, Huber R, Panksepp J. Behavioral functions of the mesolimbic dopaminergic system: an affective neuroethological perspective. Brain Res Rev. 2007 Dec;56(2):283-321.

10. Heimovics SA, Riters LV. Evidence that dopamine within motivation and song control brain regions regulates birdsong context-dependently. Physiol Behav. 2008 Sep 3;95(1-2):258-66.

11. Faure A, Haberland U, Conde F, El Massioui N. Lesion to the nigrostriatal dopamine system disrupts stimulus-response habit formation. J Neurosci. 2005 Mar 16;25(11):2771-80.

12. Toda S. [The role of the striatum in addiction]. Brain Nerve. Aug;64(8):911-7.

13. Zocchi A, Pert A. Alterations in striatal acetylcholine overflow by cocaine, morphine, and MK-801: relationship to locomotor output. Psychopharmacology (Berl). 1994 Jul;115(3):297-304.

14. Cordeira JW, Frank L, Sena-Esteves M, Pothos EN, Rios M. Brain-derived neurotrophic factor regulates hedonic feeding by acting on the mesolimbic dopamine system. J Neurosci. Feb 17;30(7):2533-41.

15. Basar K, Sesia T, Groenewegen H, Steinbusch HW, Visser-Vandewalle V, Temel Y. Nucleus accumbens and impulsivity. Prog Neurobiol. Dec;92(4):533-57.

16. Wickens JR, Budd CS, Hyland BI, Arbuthnott GW. Striatal contributions to reward and decision making: making sense of regional variations in a reiterated processing matrix. Ann N Y Acad Sci. 2007 May;1104:192-212.

17. Hamilton ME, Mele A, Pert A. Striatal extracellular dopamine in conscious vs. anesthetized rats: effects of chloral hydrate anesthetic on responses to drugs of different classes. Brain Res. 1992 Nov 27;597(1):1-7.

18. Molnar Z. Development and evolution of thalamocortical interactions. Eur J Morphol. 2000 Dec;38(5):313-20.

19. Freeman WJ. Neurodynamic models of brain in psychiatry. Neuropsychopharmacology. 2003 Jul;28 Suppl 1:S54-63.

20. Puelles L. Pallio-pallial tangential migrations and growth signaling: new scenario for cortical evolution? Brain Behav Evol.78(1):108-27.

21. Tettamanti G, Cattaneo AG, Gornati R, de Eguileor M, Bernardini G, Binelli G. Phylogenesis of brain-derived neurotrophic factor (BDNF) in vertebrates. Gene. Jan 15;450(1-2):85-93.

22. Herculano-Houzel S. The remarkable, yet not extraordinary, human brain as a scaled-up primate brain and its associated cost. Proc Natl Acad Sci U S A. Jun 26;109 Suppl 1:10661-8.

23. Heinz A, Siessmeier T, Wrase J, et al. Correlation between dopamine D(2) receptors in the ventral striatum and central processing of alcohol cues and craving. Am J Psychiatry. 2004 Oct;161(10):1783-9.

24. Kienast T, Heinz A. Dopamine and the diseased brain. CNS Neurol Disord Drug Targets. 2006 Feb;5(1):109-31.

25. Kayser AS, Allen DC, Navarro-Cebrian A, Mitchell JM, Fields HL. Dopamine, corticostriatal connectivity, and intertemporal choice. J Neurosci. Jul 4;32(27):9402-9.

26. Narayanan NS, Guarnieri DJ, DiLeone RJ. Metabolic hormones, dopamine circuits, and feeding. Front Neuroendocrinol. Jan;31(1):104-12.

27. Wise RA. Brain reward circuitry: insights from unsensed incentives. Neuron. 2002 Oct 10;36(2):229-40.

28. Paolone G, Angelakos CC, Meyer PJ, Robinson TE, Sarter M. Cholinergic control over attention in rats prone to attribute incentive salience to reward cues. J Neurosci. May 8;33(19):8321-35.

29. Mark GP, Shabani S, Dobbs LK, Hansen ST. Cholinergic modulation of mesolimbic dopamine function and reward. Physiol Behav. Jul 25;104(1):76-81.

30. Fontana DJ, Post RM, Pert A. Conditioned increases in mesolimbic dopamine overflow by stimuli associated with cocaine. Brain Res. 1993 Nov 26;629(1):31-9.

31. Giuliano F, Allard J. Dopamine and sexual function. Int J Impot Res. 2001 Aug;13 Suppl 3:S18-28.

32. Berthoud HR, Lenard NR, Shin AC. Food reward, hyperphagia, and obesity. Am J Physiol Regul Integr Comp Physiol. Jun;300(6):R1266-77.

33. Rossing MA. Genetic influences on smoking: candidate genes. Environ Health Perspect. 1998 May;106(5):231-8.

34. Flagel SB, Watson SJ, Akil H, Robinson TE. Individual differences in the attribution of incentive salience to a reward-related cue: influence on cocaine sensitization. Behav Brain Res. 2008 Jan 10;186(1):48-56.

35. Flagel SB, Watson SJ, Robinson TE, Akil H. Individual differences in the propensity to approach signals vs goals promote different adaptations in the dopamine system of rats. Psychopharmacology (Berl). 2007 Apr;191(3):599-607.

36. Gerevich J, Bacskai E. [Health care needs of cocaine users in Hungary: results of a qualitative study]. Orv Hetil. 2004 Feb 22;145(8):445-51.

37. Ray SL. Male survivors' perspectives of incest/sexual abuse. Perspect Psychiatr Care. 2001 Apr-Jun;37(2):49-59.

38. Harder VS, Morral AR, Arkes J. Marijuana use and depression among adults: Testing for causal associations. Addiction. 2006 Oct;101(10):1463-72.

39. Thomas MJ, Kalivas PW, Shaham Y. Neuroplasticity in the mesolimbic dopamine system and cocaine addiction. Br J Pharmacol. 2008 May;154(2):327-42.

40. Haller DL, Miles DR. Personality disturbances in drug-dependent women: relationship to childhood abuse. Am J Drug Alcohol Abuse. 2004 May;30(2):269-86.

41. Langeland W, Draijer N, van den Brink W. Psychiatric comorbidity in treatment-seeking alcoholics: the role of childhood trauma and perceived parental dysfunction. Alcohol Clin Exp Res. 2004 Mar;28(3):441-7.

42. Fuchs E, Czeh B, Kole MH, Michaelis T, Lucassen PJ. Alterations of neuroplasticity in depression: the hippocampus and beyond. Eur Neuropsychopharmacol. 2004 Dec;14 Suppl 5:S481-90.

43. Gehrmann J, Mies G, Bonnekoh P, et al. Microglial reaction in the rat cerebral cortex induced by cortical spreading depression. Brain Pathol. 1993 Jan;3(1):11-7.

44. Manji HK, Drevets WC, Charney DS. The cellular neurobiology of depression. Nat Med. 2001 May;7(5):541-7.

45. Manji HK, McNamara R, Chen G, Lenox RH. Signalling pathways in the brain: cellular transduction of mood stabilisation in the treatment of manic-depressive illness. Aust N Z J Psychiatry. 1999 Dec;33 Suppl:S65-83.

46. Payne JL, Quiroz JA, Zarate CA, Jr., Manji HK. Timing is everything: does the robust upregulation of noradrenergically regulated plasticity genes underlie the rapid antidepressant effects of sleep deprivation? Biol Psychiatry. 2002 Nov 15;52(10):921-6.

advertisement
More from Billi Gordon Ph.D.
More from Psychology Today