probs of consciousness returns Flashcards
binding problem
How does the brain unify all the individual pieces to feel like one continuous experience?
*Neural correlates of consciousness (NCC)
Attempts to find the brain regions and patterns of
activity that correspond to conscious experiences
Neuronal assemblies
Networks of neurons that fire at the same rate and frequency
Gamma Oscillations
oscillate a certain frequency
* About 40 Hz (40 cycles/per second)
* The electric signal can back-propagate
default mode network
A network of connected brain area that are most commonly active while conscious
brain areas involved in DMN
- Medial Prefrontal Cortex (MPFC): info abt self
- Dorsolateral Prefrontal Cortex (DLPFC): feelings of control over actions
- Temporal-Parietal Junction (TPJ): attention
- Hippocampus: memories
“perturbational complexity”
- Neuroscience can measure the complexity needed to create conscious states, measured using TMS
importance of perturbational complexity
determine whether people in comas or
persistent vegetative states (i.e. brain dead) are having conscious experiences
Libet’s study of Free Will
Brain prepares to move before conscious awareness of deciding to move
delay of consciousness
Your brain takes a bit of time to convert sensory inputs
into conscious experiences
libet’s experiment
direct stimulation of somatosensory cortex and direct stimulation of skin ; <500ms no feeling, >500ms feeling
Neuronal Adequacy
Sensory experiences only become conscious if the sensory cortex is active for at least 500ms
subjective backdating
Perceptions of time may not match true measurements of time