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Related Concept Videos

Mutations01:39

Mutations

Overview
Mutations01:35

Mutations

Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Mutations01:39

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Spontaneous and Induced Mutations01:30

Spontaneous and Induced Mutations

Spontaneous mutations arise infrequently during DNA replication due to errors in the process. A key factor behind these errors is tautomeric shifts in nitrogenous bases, where bases transition from keto to enol forms or amino to imino forms. This shift can alter base-pairing rules, leading to mutations. Additionally, reactive oxygen species (ROS) arising from aerobic metabolism can damage DNA, resulting in depurination (loss of a purine base) or depyrimidination (loss of a pyrimidine base).
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Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders

Schizophrenia is a neurodevelopmental disorder whose origins are rooted in complex genetic components. Despite our burgeoning understanding, the pathophysiology of this disorder remains incompletely deciphered.
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Schizophrenia, a complex psychiatric disorder, has been historically misunderstood. Early psychological theories attributed its origins to childhood trauma and unresponsive parenting. However, contemporary research largely rejects these notions, favoring the vulnerability-stress hypothesis. This model proposes that individuals with a genetic predisposition to schizophrenia may develop the disorder following exposure to significant environmental stressors. Notably, studies on high-risk...

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Related Experiment Video

Updated: Jun 13, 2026

Memorization-Based Training and Testing Paradigm for Robust Vocal Identity Recognition in Expressive Speech Using Event-Related Potentials Analysis
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Published on: August 9, 2024

[Mutation voice disorders conditioned by psychic factors].

Anna Wojciechowska1, Andrzej Obrebowski, Katarzyna Studzińska

  • 1Katedra i Klinika Foniatrii i Audiologii, Uniwersytetu Medycznego im. Karola Marcinkowskiego w Poznaniu. anwojciech@gmail.com

Otolaryngologia Polska = the Polish Otolaryngology
|May 19, 2010
PubMed
Summary

This study details a 17-year-old boy with mutational falsetto, influenced by psychological factors and a close mother-son bond. Successful voice pitch rehabilitation requires family psychological therapy and phonation exercises.

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Published on: May 9, 2019

Area of Science:

  • Otolaryngology
  • Psychiatry
  • Speech-Language Pathology

Background:

  • Mutational falsetto, or puberphonia, can arise from complex psychological factors.
  • A strong emotional bond with a parent, particularly the mother, may contribute to persistent falsetto voice in adolescents.
  • Personality disorders can influence the development and maintenance of voice disorders.

Observation:

  • A 17-year-old male presented with mutational falsetto.
  • Psychic factors, including personality disorders and a significant emotional attachment to his mother, were identified as contributing elements.
  • Phonation exercises were implemented as part of the therapeutic intervention.

Findings:

  • Phonation exercises led to a reduction in the average voice pitch.
  • Acoustic voice analysis objectively confirmed the positive outcomes of the rehabilitation process.
  • Sustained improvement in voice pitch was contingent upon effective psychological therapy for the entire family.

Implications:

  • Integrated phoniatric and psychological interventions are crucial for treating mutational falsetto.
  • Family-centered therapy can enhance the long-term success of voice rehabilitation.
  • Objective acoustic analysis provides valuable data for assessing treatment efficacy in voice disorders.