The Ravenous Brain: How the New Science of Consciousness Explains Our Insatiable Search for Meaning

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The Ravenous Brain: How the New Science of Consciousness Explains Our Insatiable Search for Meaning Page 39

by Bor, Daniel


  225 Vegetative state . . . thalamus . . . pathways to the prefrontal cortex

  S. Laureys et al., Restoration of thalamocortical connectivity after recovery from persistent vegetative state. Lancet, 2000.355 (9217): 1790–1791.

  226 Rating scales, which standardize and quantify the diagnostic

  C. Schnakers et al., Diagnostic accuracy of the vegetative and minimally conscious state: clinical consensus versus standardized neurobehavioral assessment. BioMedCentral Neurol, 2009. 9: 35.

  227 Invalid . . . assume . . . no conscious life . . . completely paralyzed

  M. M. Monti, S. Laureys, and A. M. Owen, The vegetative state. Brit Med J, 2010. 341: c3765.

  227 One recent large-scale study . . . involved 41 patients

  M. R. Coleman et al., Towards the routine use of brain imaging to aid the clinical diagnosis of disorders of consciousness. Brain, 2009. 132 (Pt 9): 2541–2552.

  228 In 2006 with a twenty-three-year-old woman

  A. M. Owen et al., Detecting awareness in the vegetative state. Science, 2006. 313(5792): 1402.

  228 Normal, healthy controls performing the same imaginary tasks

  M. Boly et al., When thoughts become action: an fMRI paradigm to study volitional brain activity in non-communicative brain injured patients. NeuroImage, 2007. 36(3): 979–992.

  229 Owen . . . showed that only about 17 percent

  M. M. Monti et al., Willful modulation of brain activity in disorders of consciousness. N Engl J Med, 2010. 3 62(7): 579–589.

  229 Owen’s group . . . testing the use of EEG

  D. Cruse et al., Bedside detection of awareness in the vegetative state: a cohort study. Lancet, 2011. 378(9808): 2088–2094.

  229 This technique was later used on . . . a young Belgian man

  Monti et al (2010), see above.

  231 Davinia Fernandez-Espejo . . . relatively novel MRI scanning technique

  D. Fernández-Espejo et al., Diffusion weighted imaging distinguishes the vegetative state from the minimally conscious state. NeuroImage, 2011. 54(1): 103–112.

  231 Melanie Boly and colleagues were able to show

  M. Boly et al., Preserved feedforward but impaired top-down processes in the vegetative state. Science, 2011. 332(6031): 858–862.

  231 Another principled approach . . . uses the TMS-EEG technique

  M. Massimini et al., A perturbational approach for evaluating the brain’s capacity for consciousness. Prog Brain Res, 2009. 177: 201–214.

  232 Nicholas Schiff . . . deep brain stimulation

  N. D. Schiff et al., Behavioural improvements with thalamic stimulation after severe traumatic brain injury. Nature, 2007. 448(7153): 600–603.

  232 Raif Clauss . . . a common sleeping drug

  R. Clauss and W. Nel, Drug induced arousal from the permanent vegetative state. NeuroRehabilitation, 2006. 21(1): 23–28.

  233 Other research groups . . . shown that zolpidem . . . improve conscious

  J. Whyte and R. Myers, Incidence of clinically significant responses to zolpidem among patients with disorders of consciousness: a preliminary placebo controlled trial. Am J Phys Med Rehab, 2009. 88(5): 410–4 18.

  CHAPTER 8: CONSCIOUSNESS SQUEEZED, STRETCHED, AND SHRUNK

  237 (WHO) estimates that up to a quarter of all people

  World Health Organization (WHO), Global status report on non-communicable diseases 2010. 2011, Geneva: WHO.

  237 Loss to the economy due to mental illness

  D. E. Bloom et al., The global economic burden of non-communicable diseases , W. E. Forum, ed. 2011, Geneva: World Economic Forum.

  239 Autistic children . . . improvements . . . behavioral intervention program

  G. Dawson et al., Randomized, controlled trial of an intervention for toddlers with autism: the early start Denver Model. Pediatr, 2009. 125(1): e17–e23.

  239 Autism . . . centrally defined . . . excessive richness of information

  L. Mottron et al., Enhanced perceptual functioning in autism: an update, and eight principles of autistic perception. J Autism Dev Disord, 2006. 36(1): 27–43.

  H. Markram, T. Rinaldi, and K. Markram, The intense world syndrome—an alternative hypothesis for autism. Front Neurosci, 2007. 1(1): 77–96.

  239 Prominent figures . . . suffered from Asperger’s syndrome

  H. Muir, Did Einstein and Newton have autism? New Scientist, 2003. 2393: 10.

  James, I., Singular scientists. J Royal Soc Med, 2003. 96(1): 36–39.

  240 Give autistics the Raven’s matrices test . . . IQ jumps

  M. Dawson et al., The level and nature of autistic intelligence. Psychol Sci, 2007. 18(8): 657–662.

  240 Superior abilities in . . . perceptual and analytical areas

  Mottron et al (2006), see above.

  240 Autism is the opposite of schizophrenia

  B. Crespi, P. Stead, and M. Elliot, Evolution in health and medicine. Sackler colloquium: comparative genomics of autism and schizophrenia. Proc Natl Acad Sci USA, 2009.

  241 Small range of superior skills that autistic people adopt

  D. A. Treffert, The savant syndrome: an extraordinary condition. A synopsis : past, present, future. Philos Trans Royal Soc B: Biol Sci, 2009. 364(1522): 13 5 1–13 57.

  241 “. . . [N]umerical comfort blanket”

  D. Tammet, Born on a blue day: a memoir of Aspergers and an extraordinary mind. 2006, London: Hodder & Stoughton.

  242 Autistic people have an imbalance of these chemicals

  A. M. Persico and T. Bourgeron, Searching for ways out of the autism maze: genetic, epigenetic and environmental clues. Trends Neurosci, 2006. 29(7): 349–358.

  242 Arbaclofen acts to restore this balance

  L. W. Wang, E. Berry-Kravis, and R. J. Hagerman, Fragile X: leading the way for targeted treatments in autism. Neurotherapeutics, 2010. 7(3): 264–274.

  244 Sleep deprivation . . . consistently fatal

  C. A. Everson, B. M. Bergmann, and A. Rechtschaffen, Sleep deprivation in the rat: III. Total sleep deprivation. Sleep, 1989. 12(1): 13–21.

  244 Sleep . . . a key ingredient in effective learning and memory

  M. P. Walker and R. Stickgold, Sleep-dependent learning and memory consolidation. Neuron, 2004. 44(1): 121–133.

  244 Neurons . . . need a period of reduced activity to reset

  G. Tononi and C. Cirelli, Sleep function and synaptic homeostasis. Sleep Med Rev, 2006. 10(1): 49–62.

  245 Rise of depression related to . . . severity of the breathing problems

  P. E. Peppard et al., Longitudinal association of sleep-related breathing disorder and depression. Arch Intern Med, 2006. 166(16): 1709–1715.

  245 SAD . . . light therapy . . . raise alertness levels

  G. Vandewalle, P. Maquet, and D. J. Dijk, Light as a modulator of cognitive brain function. Trends Cogn Sci, 2009. 13(10): 429–438.

  246 David Gozal . . . ADHD if they had sleep apnea

  L. M. O’Brien et al., Sleep and neurobehavioral characteristics of 5- to 7-year-old children with parentally reported symptoms of attention-deficit /hyperactivity disorder. Pediatr, 2003. 111(3): 554–563.

  246 REM sleep the next night increases to catch up

  C. F. Reynolds III et al., Sleep deprivation in healthy elderly men and women: effects on mood and on sleep during recovery. Sleep, 1986. 9(4): 492–501.

  246 Disturbance in REM sleep . . . depressives and schizophrenics

  D. Riemann, M. Berger, and U. Voderholzer, Sleep and depression—results from psychobiological studies: an overview. Biol Psychol, 2001. 57(1–3): 67–103.

  M. S. Keshavan, C. F. Reynolds, and D. J. Kupfer, Electroencephalographic sleep in schizophrenia: a critical review. Compr Psychiatry, 1990. 31(1): 3 4–47.

  246 Prefrontal parietal network . . . is . . . underactivated in ADHD

  T. Silk et al., Dysfunction in the fronto-parietal network in attention deficit hyperactivity disorder (ADHD): an fMRI study. Brain Imaging Behav, 2008. 2(2): 123–131.

  246 Bipolar d
isorder . . . ties with sleep

  D. T. Plante and J. W. Winkelman, Sleep disturbance in bipolar disorder: therapeutic implications. Am J Psychiatry, 2008. 165(7): 830–843.

  247 Abnormalities in genetic and molecular processes that regulate sleep

  K. Wulff et al., Sleep and circadian rhythm disruption in psychiatric and neurodegenerative disease. Nat Rev Neurosci, 2010. 11(8): 589–599.

  247 Coffee intake prevents suicide

  I. Kawachi et al., A prospective study of coffee drinking and suicide in women. Arch Intern Med, 1996. 156(5): 521–525.

  247 Increased coffee drinking . . . lower incidence of depression

  M. Lucas et al., Coffee, caffeine, and risk of depression among women. Arch Intern Med, 2011. 171(17): 1571–1578.

  247 Light therapy . . . help in all manner of psychiatric conditions

  M. Terman, Evolving applications of light therapy. Sleep Med Rev, 2007. 11(6): 497–507.

  248 Poorer quality sleep . . . impair[s] . . . working memory

  M.-R. Steenari et al., Working memory and sleep in 6- to 13-year-old schoolchildren. J Am Acad Child Adolesc Psychiatry, 2003. 42(1): 85–92.

  248 Michael Chee . . . lack of sleep . . . less efficient prefrontal parietal

  M.W.L. Chee and W. C. Choo, Functional imaging of working memory after 24 hr of total sleep deprivation. J Neurosci, 2004. 24(19): 4560–4567.

  248 Robert Thomas . . . studying adults with sleep apnea

  R. J. Thomas et al., Functional imaging of working memory in obstructive sleep-disordered breathing. J Appl Physiol, 2005. 98(6): 2226–223 4.

  248 Light therapy . . . boosts . . . attention and working memory

  Vandewalle et al (2009), see above.

  248 ADHD children working memory . . . especially low

  R. Martinussen et al., A meta-analysis of working memory impairments in children with attention-deficit/hyperactivity disorder. J Am Acad Child Adolesc Psychiatry, 2005. 44(4): 377–384.

  249 Baba Shiv . . . the difficult . . . number . . . likely to choose . . . cake

  B. Shiv and A. Fedorikhin, Heart and mind in conflict: the interplay of affect and cognition in consumer decision making. J Cons Res, 1999. 26(3): 278–292.

  249 Clear relationship . . . poor sleep and obesity

  G. Hasler et al., The association between short sleep duration and obesity in young adults: a 13-year prospective study. Sleep, 2004. 27(4): 661–666.

  249 Reduced working memory . . . psychological cause of [schizophrenic symptoms]

  P. Goldman-Rakic, Working memory dysfunction in schizophrenia. J Neuropsychiatry Clin Neurosci, 1994. 6(4): 348–357.

  H. Silver et al., Working memory deficit as a core neuropsychological dysfunction in schizophrenia. Am J Psychiatry, 2003. 160(10): 1809–1816.

  J. Lee and S. Park, Working memory impairments in schizophrenia: a meta-analysis. J Abnorm Psychol, 200 5. 114(4): 599–6 11.

  249 Schizophrenics also have a dysfunctional prefrontal cortex

  C. S. Carter et al., Functional hypofrontality and working memory dysfunction in schizophrenia. Am J Psychiatry, 1998. 155(9): 1285–1287.

  250 Well subjects . . . Ritalin . . . prefrontal functions more efficiently

  M. A. Mehta et al., Methylphenidate enhances working memory by modulating discrete frontal and parietal lobe regions in the human brain. J Neurosci, 2000. 20(6): RC65.

  250 Ritalin . . . schizophrenics . . . create psychotic symptoms

  D. S. Janowsky et al., Provocation of schizophrenic symptoms by intravenous administration of methylphenidate. Arch Gen Psychiatry, 1973. 28(2): 185–191.

  250 You actually need a medium amount of dopamine

  S. Vijayraghavan et al., Inverted-U dopamine D1 receptor actions on prefrontal neurons engaged in working memory. Nat Neurosci, 2007. 10(3): 376–384.

  251 Schizophrenics . . . deficient glutamate . . . knock-on effect on dopamine

  M. Laruelle, L. S. Kegeles, and A. Abi-Dargham, Glutamate, dopamine, and schizophrenia. Ann NY Acad Sci, 2003. 1003(1): 138–158.

  J. W. Olney and N. B. Farber, Glutamate receptor dysfunction and schizophrenia. Arch Gen Psychiatry, 1995. 52(12): 998–1007.

  J. Coyle, Glutamate and schizophrenia: beyond the dopamine hypothesis. Cell Mol Neurobiol, 2006. 26(4): 363–382.

  251 Normal people, ketamine can . . . turn them into schizophrenics

  P. C. Fletcher and G. D. Honey, Schizophrenia, ketamine and cannabis: evidence of overlapping memory deficits. Trends Cogn Sci, 2006. 10(4): 167–174.

  251 Schizophrenics . . . ketamine . . . exacerbate all their symptoms

  A. C. Lahti et al., Effects of ketamine in normal and schizophrenic volunteers. Neuropsychopharmacol, 2001. 25(4): 455–467.

  252 About 40 percent of schizophrenics gain any benefit

  S. Leucht et al., How effective are second-generation antipsychotic drugs? A meta-analysis of placebo-controlled trials. Mol Psychiatry, 2008. 14(4): 429–447.

  252 67 percent of schizophrenic patients report [adverse side effects]

  J. A. Lieberman et al., Effectiveness of antipsychotic drugs in patients with chronic schizophrenia. New Engl J Med, 2005.353 (12): 1209–1223.

  252 Anecdotal evidence . . . schizophrenics function better . . . never been prescribed

  K. Hopper and J. Wanderling, Revisiting the developed versus developing country distinction in course and outcome in schizophrenia: results from ISoS, the WHO collaborative followup project. Schizophr Bull, 2000. 26(4): 835–846.

  252 Sandeep Patil . . . created a drug that targets

  S. T. Patil et al., Activation of mGlu2/3 receptors as a new approach to treat schizophrenia: a randomized Phase 2 clinical trial. Nat Med, 2007. 13(9): 1102–1107.

  253 Single genes . . . turned on or off . . . sections of DNA . . . change neurotransmitter function

  F. Holsboer, How can we realize the promise of personalized antidepressant medicines? Nat Rev Neurosci, 2008. 9(8): 638–646.

  254 Genes coding for dopamine and prefrontal function . . . psychiatric conditions

  A. Meyer-Lindenberg and D. R. Weinberger, Intermediate phenotypes and genetic mechanisms of psychiatric disorders. Nat Rev Neurosci, 2006. 7(10): 818–827.

  254 Genes . . . respond to SSRIs . . . pass the blood-brain barrier

  Holsboer (2008), see above.

  254 Novel brain-scanning . . . measure neurotransmitter changes

  P. M. Matthews, G. D. Honey, and E. T. Bullmore, Applications of fMRI in translational medicine and clinical practice. Nat Rev Neurosci, 2006. 7(9): 732–744.

  255 Healthy nonelderly people don’t gain any generalized improvement

  A. M. Owen et al., Putting brain training to the test. Nature, 2010. 465(7299): 775–778.

  255 Cognitive training is useful in staving off dementia

  R. S. Wilson et al., Cognitive activity and the cognitive morbidity of Alzheimer disease. Neurol, 2010. 75(11): 990–996.

  255 Torkel Klingberg . . . gave ADHD children . . . tasks to practice

  T. Klingberg, H. Forssberg, and H. Westerberg, Training of working memory in children with ADHD. J Clin Exp Neuropsychol, 2002. 24(6): 781–79 1.

  255 Training in the scanner . . . boost prefrontal parietal . . . activity

  P. J. Olesen, H. Westerberg, and T. Klingberg, Increased prefrontal and parietal activity after training of working memory. Nat Neurosci, 2004. 7(1): 75–79.

  255 Joni Holmes . . . compared . . . Ritalin . . . to working memory training

  J. Holmes et al., Working memory deficits can be overcome: impacts of training and medication on working memory in children with ADHD. Appl Cogn Psychol, 2010. 24(6): 827–836.

  255 Melissa Fisher . . . cognitive-training program . . . schizophrenic patients improved

  M. Fisher et al., Neuroplasticity-based cognitive training in schizophrenia: an interim report on the effects 6 months later. Schizophr Bull, 2010. 36(4): 869–879.

  256 Sylvia Nasar’s book

  S. Nasar, A be
autiful mind: a biography of John Forbes Nash, Jr. 1998, New York: Simon & Schuster.

  257 Half-strangled prefrontal cortex can . . . suppress amygdala activity

  S. J. Bishop, Neurocognitive mechanisms of anxiety: an integrative account. Trends Cogn Sci, 2007. 11(7): 307–316.

 

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