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Related Concept Videos

Autism Spectrum Disorder01:19

Autism Spectrum Disorder

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Autism spectrum disorder (ASD) is a neurodevelopmental condition marked by persistent deficits in social communication and interaction alongside restrictive and repetitive behaviors or interests. ASD is sometimes accompanied by intellectual impairment.
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The Electromagnetic Spectrum02:37

The Electromagnetic Spectrum

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The electromagnetic spectrum consists of all the types of electromagnetic radiation arranged according to their frequency and wavelength. Each of the various colors of visible light has specific frequencies and wavelengths associated with them, and you can see that visible light makes up only a small portion of the electromagnetic spectrum. Because the technologies developed to work in various parts of the electromagnetic spectrum are different, for reasons of convenience and historical...
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The Electromagnetic Spectrum01:24

The Electromagnetic Spectrum

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Electromagnetic waves are categorized according to their wavelengths and frequencies, giving the electromagnetic spectrum. These waves are classified as radio, infrared, ultraviolet, etc. Radio waves refer to electromagnetic radiation with wavelengths ranging from millimeters to kilometers. Radio waves are commonly used for audio communications (i.e., radios) and typically result from an alternating current in the wires of a broadcast antenna. They cover a broad wavelength range and are used...
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IR Spectrum01:19

IR Spectrum

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When infrared (IR) radiation passes through a molecule, the bonds stretch or bend by absorbing the radiation. This absorption creates the molecule's absorption spectrum, which is the plot of its percentage transmittance versus wavenumber.
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Mass Spectrum01:23

Mass Spectrum

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A mass spectrum is the graphical representation of the relative abundance of the charged fragments in an analyte plotted against their mass-to-charge ratio (m/z). The plot's x-axis represents the ratio of the mass of the charged fragment to the number of charges it carries. The y axis of the plot represents the relative abundance of each charged species. The relative abundance is calculated from the signal intensity of each charged species recorded at the detector. The most intense signal (the...
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UV–Vis Spectrum01:30

UV–Vis Spectrum

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When light passes through a substance, a portion of the light is absorbed while the remaining light is reflected or transmitted. If the molecule absorbs light between the wavelengths of 180–400 nm range, the UV spectrum is obtained, and if it absorbs light in the 400–780 nm wavelength range, the visible spectrum is obtained.     
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A Semantic Priming Event-related Potential ERP Task to Study Lexico-semantic and Visuo-semantic Processing in Autism Spectrum Disorder
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Methodological Challenges in Studying Autism Spectrum Disorder.

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Summary
This summary is machine-generated.

The serotonin system is linked to autism spectrum disorder (ASD) risk, with hyperserotonemia found in over 25% of pediatric cases. Understanding the exact mechanisms is challenging due to complex genetic and environmental interactions.

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Area of Science:

  • Neuroscience
  • Genetics
  • Developmental Biology

Background:

  • Genetic, animal, and epidemiological studies consistently link the serotonin (5-HT) system to autism spectrum disorder (ASD) risk.
  • Hyperserotonemia, elevated serotonin levels, is observed in over 25% of pediatric ASD cases.
  • Serotonergic system dysfunction is a plausible factor in ASD pathophysiology, yet precise mechanisms remain unclear.

Discussion:

  • Disentangling the precise role of the serotonin system in ASD is complicated by interactions between genetic predispositions and environmental exposures.
  • Gestational exposure to selective 5-HT reuptake inhibitors (SSRIs) represents a key environmental factor requiring investigation.
  • The inherent heterogeneity of ASD, encompassing diverse phenotypes and prognoses, further complicates mechanistic studies.

Key Insights:

  • The serotonin system's role in ASD is strongly supported by multiple lines of evidence.
  • A significant subset of individuals with ASD exhibit hyperserotonemia.
  • Understanding ASD pathophysiology requires addressing the complex interplay of genetic and environmental factors influencing serotonergic pathways.

Outlook:

  • Further research is needed to elucidate the specific molecular and circuit-level mechanisms by which the serotonin system contributes to ASD.
  • Investigating the impact of prenatal SSRI exposure on neurodevelopmental trajectories is crucial.
  • Developing targeted interventions for ASD may benefit from a deeper understanding of serotonergic system involvement.