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Related Concept Videos

Pigmentation01:19

Pigmentation

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The color of the skin is influenced by a number of pigments, including melanin, carotene, and hemoglobin. Recall that melanin is produced by cells called melanocytes, which are found scattered throughout the stratum basale of the epidermis. The melanin is transferred to the keratinocytes via melanosomes.
Melanin occurs in two primary forms: eumelanin that provides black and brown pigment and pheomelanin that provides red color. Dark-skinned individuals produce more melanin than those with pale...
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Changes in Skin Color: Clinical Perspectives01:14

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The first thing a clinician sees is the skin, so the examination of the skin should be part of any thorough physical examination. Most skin disorders are relatively benign, but a few, including melanomas, can be fatal if untreated. A couple of the more noticeable disorders, albinism and vitiligo, affect the appearance of the skin and its accessory organs.
Albinism
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Biopsychology serves as a vital bridge connecting the intricate domains of biology and psychology, shedding light on how biological systems influence psychological phenomena. This field scrutinizes the biological substrates of behavior and mental processes, emphasizing the nervous system along with the roles of neurotransmitters, hormones, and genetics. It also incorporates evolutionary perspectives to explain the adaptive nature of mental functions.
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Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
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Human Genetics01:28

Human Genetics

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Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
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At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
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Related Experiment Video

Updated: Jun 23, 2025

Pharmacologic Induction of Epidermal Melanin and Protection Against Sunburn in a Humanized Mouse Model
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Pharmacologic Induction of Epidermal Melanin and Protection Against Sunburn in a Humanized Mouse Model

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The Skin-Brain Axis: From UV and Pigmentation to Behaviour Modulation.

Anna A Ascsillán1,2,3,4, Lajos V Kemény1,2,3

  • 1Department of Dermatology, Venereology and Dermatooncology, Faculty of Medicine, Semmelweis University, 1085 Budapest, Hungary.

International Journal of Molecular Sciences
|June 19, 2024
PubMed
Summary

The skin-brain axis links skin pigmentation to central nervous system (CNS) functions, influencing behavior and disease. This review explores how skin pigment pathways and CNS signaling impact health and neurological conditions.

Keywords:
ACTHAddison’s diseaseHPA axisMC1RMITFMSHPOMCParkinson’s diseaseUVRcentral nervous systemcortisoleumelaninkeratinocytemelanocytemelanogenesismelanomaneuromelaninnociceptionopioid signallingpheomelaninpigmentationredheadskinskin–brain axistyrosinasevitamin D

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Quantifying Abdominal Pigmentation in Drosophila melanogaster
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Related Experiment Videos

Last Updated: Jun 23, 2025

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Area of Science:

  • Neuroscience
  • Dermatology
  • Endocrinology

Background:

  • The skin-brain axis is implicated in various conditions like opioid addiction and Parkinson's disease.
  • Skin pigmentation pathways and CNS responses are increasingly recognized as interconnected.
  • Shared neuroectodermal origins link CNS diseases to pigmentation changes.

Purpose of the Study:

  • To review the interplay between skin pigmentation and the central nervous system (CNS).
  • To summarize recent findings on skin-brain signaling pathways.
  • To enhance understanding of skin-brain associations in health and disease.

Main Methods:

  • Literature review synthesizing current research on the skin-brain axis.
  • Analysis of signaling pathways involved in skin pigment production and neuromelanin synthesis.
  • Exploration of hormonal and neural regulation of pigmentation.

Main Results:

  • Skin pigmentation pathways can directly and indirectly influence behavior.
  • CNS neural and hormonal responses demonstrably regulate skin pigmentation.
  • The skin's HPA analogue visibly indexes hormonal abnormalities.

Conclusions:

  • The skin-brain axis is a critical interface for understanding neurological and dermatological conditions.
  • Interconnections between skin pigmentation and CNS signaling offer insights into disease mechanisms.
  • Further research into the skin-brain axis can illuminate novel therapeutic targets.