E for Ecstasy by Nicholas Saunders
Appendix 1: Reference Section

73 Neurotoxicity of MDMA and related compounds: anatomic studies, Molliver et al. Annals of the New York Academy of Sciences, 1990

Axon degeneration is seen in fine 5HT axons (but not beaded axons or raphe cell bodies) within 48 hours after MDMA administration. Within six to eight hours, there is persistent serotonergic reinnervation of the frontal cortex along a fronto-occipital gradient in a simulating perinatal development of 5-HT innervation. Although the sprouting axons are anatomically similar to the damaged axons, it remains unknown whether a normal pattern of innervation is re-established.