Triangular space

Triangular space
Suprascapular and axillary nerves of right side, seen from behind. The axillary spaces are labeled in green. Triangular space is the medial space.
The scapular and circumflex arteries. (Triangular space is visible but not labeled.)
Anatomical terminology [edit on Wikidata]

The triangular space (also known as the medial triangular space,^[1] upper triangular space,^[2] or medial axillary space or foramen omotricipitale) is an axillary space.

It should not be confused with the triangular interval.

Boundaries

It has the following boundaries:

• Inferior: the superior border of the teres major;
• Lateral: the long head of the triceps;
• Superior: Teres minor or Subscapularis

For the superior border, some sources list the teres minor,^[2][3] while others list the subscapularis.^[4]

Contents

It contains the scapular circumflex vessels.^[5]

Unlike the quadrangular space or the triangular interval, no major nerve passes through the triangular space.

Muscles on the dorsum of the scapula, and the Triceps brachii.

See also

• Quadrangular space
• Triangular interval

References

1. Photo at tufts.edu
2. Kyung Won, PhD. Chung (2005). Gross Anatomy (Board Review). Hagerstown, MD: Lippincott Williams & Wilkins. p. 34. ISBN 0-7817-5309-0.
3. Anatomy photo:03:05-0101 at the SUNY Downstate Medical Center - "Triangular Space of Scapular Region"
4. Adam Mitchell; Drake, Richard; Gray, Henry David; Wayne Vogl (2005). Gray's anatomy for students. Elsevier/Churchill Livingstone. ISBN 0-443-06612-4.
5. Wasfi F, Ullah M (1985). "Structures passing through the triangular space of the human upper limb". Acta Anat (Basel) 123 (2): 112–3. doi:10.1159/000146049. PMID 4061026.

External links

• 745209934 at GPnotebook
• Diagram at microsurgeon.org
• Photo at tufts.edu
• Description at ganfyd.org
• Photo at ithaca.edu
• This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)