3D CONTENT
3D OSTEOLOGY
3D THORAX

COCCYX ANATOMY

Author: Dr. Bogdan Leahu
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Coccyx anatomy 360-degree interactive viewer showing x-ray visualization of base, coccygeal horns, and apex
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Coccyx - X-ray Mode Overview, Preview from the app. Download 3D OSTEOLOGY for full 3D control—multiple views, x-ray mode, and unlimited zoom.

TABLE OF CONTENTS

OVERVIEW

What is the coccyx?

  • The coccyx, or tailbone, is the lowermost part of your spine
  • Connects to the apex of the sacrum, forming the coccygeal segment of your vertebral column

What are the main components of the coccyx?

  • Features three main anatomical components:
    • Base
    • Coccygeal horns (cornua)
    • Apex

BASE OF THE COCCYX

Coccyx 360-degree viewer showing base, coccygeal horns, and apex with sacrococcygeal articulation
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Coccyx - General Structure, Preview from the app. Download 3D OSTEOLOGY for full 3D control—multiple views, x-ray mode, and unlimited zoom.

What is the base of the coccyx?

  • Broad, uppermost portion of the coccyx
  • Articulates with the apex of the sacrum through an oval-shaped facet

COCCYGEAL HORNS (CORNUA)

What are the coccygeal horns?

  • Upward-projecting structures on the posterior aspect of your coccyx
  • Align with the sacral horns to form a connection between your sacrum and coccyx

APEX OF THE COCCYX

What is the apex of the coccyx?

  • Tapered lower tip of the coccyx, pointing downward
  • Functions as an anchor point for ligaments supporting your pelvic structures

BIBLIOGRAPHY

1. Henry G, Warren HL. Osteology. In: Anatomy of the Human Body. 20th ed. Philadelphia: Lea & Febiger; 1918. p. 129–97.