Frequent and excessive tanning persists despite a growing understanding of its associated morbidity and mortality, suggesting that ultraviolet radiation may impart rewarding effects beyond the assumed cosmetic benefits. To empirically measure putative centrally rewarding properties of ultraviolet radiation (UVR), we assessed the effects of a commercially available tanning bed upon regional cerebral blood flow (rCBF), a measure of brain activity, using single-photon emission computed tomography (SPECT). Seven frequent salon bed tanners were placed under a UVA/UVB tanning light during two sessions; one session with UVR and the other with filtered UVR (sham UVR). Session order was randomized and subjects were blinded to study order. During the UVR session, relative to sham UVR session, subjects demonstrated a relative increase in rCBF of the dorsal striatum, anterior insula and medial orbitofrontal cortex, brain regions associated with the experience of reward. These changes were accompanied by a decrease in the subjective desire to tan. These findings suggest that UVR may have centrally rewarding properties that encourage excessive tanning.
Individuals with skin of color make up the majority of the world's population and a rapidly expanding section of the US population. Future dermatologists must be knowledgeable about dermatologic conditions presenting in patients of various ethnic backgrounds. A 10-question survey was emailed to 109 dermatology residency programs to assess if dermatologists in-training feel that their residency curriculum sufficiently gives them exposure to and education on patients with skin of color. Forty-three residents completed the survey from 5 regions of the United States. Resident responses differed by region. Residents from areas with less diversity were more likely to agree that dedicated skin of color clinics and rotations are important to gain competency compared to residents from areas with more diversity.
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