Most guided meditation asks you to picture something: a beach, a candle flame, your breath as light. For people with aphantasia, that instruction can land strangely.
Kjaer and colleagues · Cognitive Brain Research
Yoga Nidra meditation significantly increases endogenous dopamine release in the ventral striatum. This provides the first in vivo evidence that neurotransmitter regulation at the synaptic level can drive changes in conscious states.