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Related Experiment Videos

Variations observed during a 1999 dissection course--their sum and analysis.

M Yamasaki1, A Ishizawa

  • 1Department of Anatomy, Akita University School of Medicine, 1-1-1 Hondo, Akita 010-8543, Japan.

Kaibogaku Zasshi. Journal of Anatomy
|December 4, 2001
PubMed
Summary

This study documented 229 anatomical anomalies in 24 cadavers, with vascular anomalies being most frequent. Most anomalies occurred as single instances, but some individuals exhibited multiple, complex variations.

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Area of Science:

  • Anatomical variations
  • Human cadaveric studies
  • Morphological anomalies

Background:

  • Anatomical variations are common but often underreported.
  • Systematic documentation of anomalies is crucial for understanding human morphology.
  • Previous studies have not comprehensively cataloged anomalies across all body systems.

Purpose of the Study:

  • To systematically document and classify anatomical anomalies observed in a cadaver dissection course.
  • To determine the frequency and distribution of anomalies by body system and region.
  • To analyze the co-occurrence of anomalies within individuals.

Main Methods:

  • Conducted a systematic dissection of 12 male and 12 female cadavers.
  • Recorded all observed anatomical anomalies, noting their location, type, and system.

Related Experiment Videos

  • Classified anomalies by anatomical system (muscular, vascular, neural, visceral, bone) and body region.
  • Analyzed the frequency, variety, and co-occurrence of anomalies.

    • Main Results:

    • A total of 229 anomalies (132 in males, 97 in females) comprising 142 varieties were identified.
    • Vascular anomalies were most prevalent (118), particularly visceral vascular anomalies (61).
    • Muscular anomalies were the second most common (71), followed by neural (29).
    • One male cadaver presented with a maximum of 26 coincident anomalies.
    • 75% of anomaly varieties occurred as single instances.

    Conclusions:

    • Anatomical anomalies are diverse and vary in frequency across different systems and individuals.
    • Visceral vascular anomalies represent a significant category of human morphological variation.
    • Understanding the prevalence and patterns of anomalies is essential for clinical practice and anatomical education.