Can spiders experience hallucinations?

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Discussion Overview

The discussion explores whether spiders or other insects can experience hallucinations, considering the implications of drug effects on their behavior and cognitive processes. It touches on theoretical aspects of consciousness, perception, and neurological functioning in relation to hallucinations.

Discussion Character

  • Debate/contested

Main Points Raised

  • Some participants question the ability of spiders to hallucinate due to their underdeveloped visual cortices and simplistic representation of the world.
  • One participant suggests that hallucinations result from abnormal neurotransmitter levels, proposing that if insect brains could reach such levels, hallucinations might be possible.
  • Another participant defines hallucinations in terms of cognitive maps and core consciousness, arguing that spiders lack these attributes, thus concluding they cannot hallucinate.
  • Conversely, a different viewpoint posits that hallucinations could be seen as incorrect data analysis by the brain, suggesting that spiders might experience simpler forms of hallucinations that could affect their web-making abilities.

Areas of Agreement / Disagreement

Participants express differing opinions on the definition of hallucinations and the cognitive capabilities of spiders, indicating that multiple competing views remain without consensus.

Contextual Notes

The discussion includes varying definitions of hallucinations and assumptions about consciousness and perception in spiders, which remain unresolved.

Ivan Seeking
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Referring to the thread in ps that links to pictures of webs made by drugged spiders:

Spiders on lsd discussion

But I thought the joke was interesting. Can spiders or other insects hallucinate? Do we have any idea? Funny thought.
 
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Probably not, their visual cortices are way too underdeveloped. Their visual representation of the world -- define it as you will -- is probably incredibly simplistic.
 
damgo: hallucinations are results of an abnormal level of neurotransmitters. If insect brains could achieve a point where the neurotransmitters are at an abnormal level, then yes insects can hallucinate.
 
Well as far as I'm concerned an hallucination involves (but is not limited to) the distortion of the cognitive maps that form a representation of reality built from core consciousness and the various perceptual functions. Given that spiders don't possesses core consciousness or cognitive maps I would have to say that spiders cannot hallucinate.

If on the other hand you want to say that what constitutes hallucination in spiders is them getting f*cked up on drugs and their web weaving ability goes down the crapper then OK.
 
I must have a very different idea of what constitutes an hallucination. To me most hallucinations seem to be simply a case of incorrect data analysis, where the brain receives corrupted signals, or perhaps uncorrupted signals but analyses them wrong. Most hallucinations are probably as simple as seeing flashes of colour that aren't actually there, or sensing vibrations that didn't actually occur say.

If the above is correct then I believe spiders could very well experience hallucinations. Sure they are nothing compared to the kind of hallucinations humans experience when on drugs such as LSD, but the could affect the spiders web making abilities.
 

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