Theories of consciousness may have been focusing on the wrong part of the brain
11 hours ago
- #neuroscience
- #consciousness
- #brain-regions
- Consciousness is defined as the ability to have subjective experiences, like tasting or seeing.
- The cortex (neocortex) is traditionally considered fundamental to consciousness.
- The subcortex, older in evolutionary terms, is seen as necessary but not sufficient for consciousness.
- The cerebellum, often deemed irrelevant, can influence conscious perception when stimulated.
- Brain stimulation studies show altering activity in cortex, subcortex, or cerebellum affects consciousness.
- Damage to the neocortex can cause perceptual or cognitive impairments but not always loss of consciousness.
- People born without a cerebellum or parts of the cortex can still exhibit conscious behaviors.
- Damage to ancient brain regions can cause unconsciousness or death, suggesting their critical role.
- Cases of children born without a neocortex show they can still experience emotions and recognize stimuli.
- Animal studies indicate that removing the neocortex leaves mammals capable of complex behaviors.
- Evidence suggests ancient brain regions may be sufficient for basic consciousness, challenging current theories.
- Newer brain parts and the cerebellum likely expand and refine consciousness rather than create it.
- These findings may influence theories of consciousness, patient care, and animal rights perspectives.