“Most of the psychedelics tested, the researchers found, promoted the growth of new dendrites from a neuron cell, which help transmit information from other neurons to the cell, as well as increased the density of small protrusions on these dendrites, known as dendritic spines. They also jumpstarted the growth of new connections, or synapses, between individual neurons.”
Read more: https://gizmodo.com/psychedelic-drugs-may-help-the-brain-repair-itself-stu-1826765205