Re: [evol-psych] Re: Evolutionary benefit of schizophrenia?
At 22:17 29-06-2006 -0600, you wrote:
Joao Sousa:I prefer explanations that grant the overwhelming presence of defects / disease / bad outcomes, than explanations purely based on adaptation and function. This seem to be the case of Jay's nocturnal theory and to the group-splitting theory.
Jay R. Feierman: Joao, the diseases of the nervous system that are caused by bad genetic mutations have demonstrable neuropathology, as these mutations cause structural change in tissue or biochemical changes in bodily fluids. The fact that schizophrenia has no demonstrable neurpathology is why a number of different individuals have theorized that the genetic determinants of Schizophrenia are not harmful mutations.
I'm surprised by that; I've read that in the 1980s and early 1990s, but am not updated on this issue, I didn't expect that this finding (the apparent absence of neuropathology in schizophrenia) would survive the Neurosciences revolution of the 1990s.
- On Mon, Jul 03, 2006 at 09:22:08PM -0600, Jay R. Feierman wrote:
> I can't tell whether H.M Hubey, Ligesh or Joao Sousa wrote this but whoever did, it is misrepresenting what I have posted.In that case you haven't addressed the two points:
a) Artists display behaviour that can be classified as schizphrenia-like. Artists are also a group who have above average fitness. This is an empirical finding, and I had posted the url to this particular study.
b) Voices in the head--another schizphrenia-like symptom--can be highly adaptive. These people become the prophets, which is actually an high fitness position in the society.
So how do you address the above two issues?
:: Ligesh :: http://ligesh.com
> The last sentence of this posting, which can be found below and to which I am responding, says, "I think Jay has agreed that schizophrenia-like-symptoms--voices in the head, and bizarre perception of reality--are actually adaptive. The only point of contention is whether these symptoms have the same aetiology as pathological/clinical schizophrenia."
> I never said or implied that. What I have said many times is that the genes and the structures which the genes code for, whose phenotype is now human Schizophrenia, might have been adaptive in another species at another time. The reason I say this is that the adaptive or in this case maladaptive function of structure often changes through phylogeny. My nocturnal theory of Schizophrenia proposed that the genes for Schizophrenia are the genes which code for the genetic predisposition to be nocturnal, which would produce order in a normatively nocturnal species and disorder in a normatively diurnal species, such as humans, where persons with Schizophrenia would be normatively coerced to live a diurnal life with a nocturnal brain. By analogy, it would be like trying to make gay people live a straight (heterosexual) life through normative coercion.