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EVOLUTIONARY
CLASSIFICATION
DISORDER: Consc
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Archetypal
Disruption
Disorders
of:
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A
Attachment Archetype
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B
Hierarchical/
Ranking Archetype
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C
Courtship/ Mating
Archetype
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D
Threat Response Archetype
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1.
Malf-
unction
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1.1
Modular
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1.1A |
1.1B
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1.1C
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1.1D
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1.2
Integrative
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1.2A
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1.2B
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1.2C
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1.2D
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2.
Dys-
regulation
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2.1
Environmental Uniqueness
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2.1A
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2.1B
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2.1C
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2.1D |
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2.2
Maladaptive Meme
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2.2A
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2.2B
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2.2C
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2.2D
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3.
Sociability
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3.1
By-product (trade off) |
3.1A
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3.1B
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3.1C
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3.1D
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3.2
Defense |
3.2A |
3.2B |
3.2C |
3.2D |
Epilepsy
Edelman
& Tononi (2000) note that consciousness requires not only sustained integration of
distributed neuronal circuits, but also high
levels of spatial & temporal differentiation (neural activity
that changes continuously i.e. continuous switching among billions of
different patterns of firing). Low levels of differentiation are
found in epileptic seizures and in sleep. Seizures are characterised by
low frequency switching between two states - all the cortical neurones either
firing together or all silent together. Sleep is divided into two main
states: slow-wave sleep, associated with dreamless sleep i.e. reduced
consciousness, & REM sleep, associated with frequent vivid dreams. The
firing patterns of the two reflect this: slow-wave sleep is associated with
diffuse, slow waves of high voltage & REM sleep mimics wakefulness with fast
low voltage activity. They synthesise evidence for
consciousness being associated with 3 properties: (1) distributed changes
in activity of the thalamocortical
system, (2) integrated through rapid & effective re-entrant
interactions that are (3) highly differentiated, non-uniform &
heterogenous. They hypothesise that these properties give credibility to
their Evolutionary Theory of Neuronal Group Selection.
Coma
home
[ Classification Grid ]
Citation suggestion: Dr Gary Galambos, Consciousness Disorders, Evolutionary
Psychiatry Home Sydney Australia (http://www.ep.org.au/dis/consc.htm)
[date accessed]
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Site Copyright (C) 1999-2006 Dr Gary Galambos
M.B.B.S. F.R.A.N.Z.C.P.
Page last updated: 05 September 2006
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