SkinNeuronsKeratinocytesSkin AgingNeurons, AfferentSkin NeoplasmsUltraviolet RaysMotor NeuronsSkin Physiological PhenomenaCells, CulturedMelanocytesEpidermisFibroblastsSkin, ArtificialSkin DiseasesSkin PigmentationAction PotentialsDermisCysteamineDopaminergic NeuronsDose-Response Relationship, RadiationMice, HairlessSunlightImmunohistochemistrySkin TestsGABAergic NeuronsElectrophysiologyPatch-Clamp TechniquesMice, Inbred C57BLHippocampusSynapsesCell LineCell SurvivalAxonsGanglia, SpinalSkin AbsorptionOxidative StressCell DifferentiationSynaptic TransmissionWound HealingSensory Receptor CellsElectric StimulationDendritesNerve Tissue ProteinsMelaninsRNA, MessengerOlfactory Receptor NeuronsSpinal CordCerebral CortexCholinergic NeuronsMembrane Potentialsgamma-Aminobutyric AcidSignal TransductionDNA DamagePhotosensitizing AgentsNeural InhibitionDose-Response Relationship, DrugNeurons, EfferentGene Expression RegulationApoptosisMotor Neuron DiseaseModels, NeurologicalAdministration, TopicalTime FactorsAnimals, NewbornCell Line, TransformedMutationPyramidal CellsPyrimidine DimersMedulla OblongataBrainDopamineExcitatory Postsynaptic PotentialsMelanomaInterneuronsRats, WistarMesencephalonNeuropeptidesCatsMice, TransgenicBase SequenceGene ExpressionMicroscopy, FluorescenceSerotonergic NeuronsModels, BiologicalGlutamic AcidKeratinsCell ProliferationTetrodotoxinHydrogen PeroxideTyrosine 3-MonooxygenaseCalciumBrain StemAfferent PathwaysCell CountPhysical StimulationGanglia, InvertebrateMice, KnockoutMolecular Sequence DataNerve Net