Triangular interval

Musical interval

 This article is about the musical interval.
   For other uses, see Triangle (disambiguation).

Diagram illustrating a triangular interval.

Anatomical diagram showing the triangular interval in the human body.

Another view of the triangular interval in human anatomy.

The triangular interval is a term used in both music and anatomy, referring to distinct concepts in each field. In music, it describes a specific type of interval, while in anatomy, it refers to a space in the human body.

In Music

In music theory, a triangular interval is a conceptual interval that can be visualized as forming a triangle with other intervals. This concept is often used in advanced music theory to describe relationships between pitches that are not immediately adjacent but form a triangular relationship with other notes.

Properties

A triangular interval in music is not a standard interval like a perfect fifth or major third, but rather a theoretical construct used to explore the relationships between non-adjacent notes. It is often used in jazz and contemporary classical music to create complex harmonic structures.

In Anatomy

In human anatomy, the triangular interval is a space located in the shoulder region. It is bounded by the following structures:

• Superiorly by the teres major muscle
• Medially by the long head of the triceps brachii muscle
• Laterally by the humerus

Contents

The triangular interval contains important neurovascular structures, including the radial nerve and the profunda brachii artery. These structures pass through the interval to supply the posterior compartment of the arm.

Clinical Significance

Understanding the anatomy of the triangular interval is crucial for surgeons and clinicians, particularly in procedures involving the shoulder and upper arm. Injury to the structures within this space can lead to significant functional impairment.

Related Pages

• Musical interval
• Shoulder anatomy
• Radial nerve

References

• Gray, Henry. Anatomy of the Human Body. 20th ed. Philadelphia: Lea & Febiger, 1918.
• Piston, Walter. Harmony. 5th ed. New York: W.W. Norton & Company, 1987.

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  Triangular interval illustration
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  Gray's Anatomy - Image 524
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  Gray's Anatomy - Image 412 with spaces