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The `!triangular space`! (also known as the `!medial triangular space`!,`:cite-ref-1[`F5bf`_`[1`#cite-note-1]`_`f] `!upper triangular space`!,`:cite-ref-isbn0-7817-5309-0-2-0[`F5bf`_`[2`#cite-note-isbn0-7817-5309-0-2]`_`f] medial axillary space or foramen omotricipitale`:cite-ref-fermin-2015-3-0[`F5bf`_`[3`#cite-note-fermin-2015-3]`_`f]) is one of the three spaces found at the `F33f`_`[axillary space`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Axillary_space]`_`f. The other two spaces are the `F33f`_`[quadrangular space`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Quadrangular_space]`_`f and the `F33f`_`[triangular interval`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Triangular_interval]`_`f.`:cite-ref-bd-chaurasia-2010-4-0[`F5bf`_`[4`#cite-note-bd-chaurasia-2010-4]`_`f]

>>Contents

• `F0af`_`[Boundaries`#boundaries]`_`f

• `F0af`_`[Contents`#contents]`_`f

• `F0af`_`[See also`#see-also]`_`f

• `F0af`_`[References`#references]`_`f

• `F0af`_`[External links`#external-links]`_`f

-─

>>Boundaries

It has the following boundaries:

• Inferior: the superior border of the `F33f`_`[teres major`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Teres_major]`_`f;

• Lateral: the long head of the `F33f`_`[triceps`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Triceps]`_`f;

• Superior: Teres minor

For the superior border, some sources list the `F33f`_`[teres minor`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Teres_minor]`_`f,`:cite-ref-isbn0-7817-5309-0-2-1[`F5bf`_`[2`#cite-note-isbn0-7817-5309-0-2]`_`f]`:cite-ref-5[`F5bf`_`[5`#cite-note-5]`_`f] while others list the `F33f`_`[subscapularis`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Subscapularis]`_`f.`:cite-ref-isbn0-443-06612-4-6-0[`F5bf`_`[6`#cite-note-isbn0-443-06612-4-6]`_`f]

>>Contents

It contains the `F33f`_`[scapular circumflex`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Scapular_circumflex]`_`f vessels.`:cite-ref-7[`F5bf`_`[7`#cite-note-7]`_`f]

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

>>See also

• `F33f`_`[Quadrangular space`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Quadrangular_space]`_`f

• `F33f`_`[Triangular interval`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Triangular_interval]`_`f

>>References

`:cite-note-1`!1.`! `F0af`_`[↑`#cite-ref-1]`_`f Photo at tufts.edu

`:cite-note-isbn0-7817-5309-0-2`!2.`! `F0af`_`[↑`#cite-ref-isbn0-7817-5309-0-2-0]`_`f `:citerefkyung-won-phd-chung2005`aKyung Won, PhD. Chung (2005). `*Gross Anatomy (Board Review)`*. Hagerstown, MD: Lippincott Williams & Wilkins. p. 34. `F33f`_`[ISBN`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=ISBN_(identifier)]`_`f 0-7817-5309-0.

`:cite-note-fermin-2015-3`!3.`! `F0af`_`[↑`#cite-ref-fermin-2015-3-0]`_`f `:citerefvalera-garrido2015`aValera Garrido, Fermin (October 2, 2015). `*Advanced Techniques in Musculoskeletal Medicine and Physiotherapy: Using Minimally Invasive Therapies in Practice`*. Elsevier Health Sciences. p. 113. `F33f`_`[ISBN`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=ISBN_(identifier)]`_`f 9780702062346. Retrieved January 26, 2018.

`:cite-note-bd-chaurasia-2010-4`!4.`! `F0af`_`[↑`#cite-ref-bd-chaurasia-2010-4-0]`_`f `:citerefkrishna2010`aKrishna, Garg (2010). "7 - Scapula". `*BD Chaurasia's Human Anatomy (Regional and Applied Dissection and Clinical) Volume 1 - Upper limb and thorax`* (Fifth ed.). India: CBS Publishers and Distributors Pvt Ltd. pp. 81, 82. `F33f`_`[ISBN`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=ISBN_(identifier)]`_`f 978-81-239-1863-1.

`:cite-note-5`!5.`! `F0af`_`[↑`#cite-ref-5]`_`f Anatomy photo:03:05-0101 at the SUNY Downstate Medical Center - "Triangular Space of Scapular Region"

`:cite-note-isbn0-443-06612-4-6`!6.`! `F0af`_`[↑`#cite-ref-isbn0-443-06612-4-6-0]`_`f `:citerefadam-mitchelldrake-richardgray-henry-davidwayne-vogl2005`aAdam Mitchell; Drake, Richard; Gray, Henry David; Wayne Vogl (2005). `*Gray's anatomy for students`*. Elsevier/Churchill Livingstone. `F33f`_`[ISBN`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=ISBN_(identifier)]`_`f 0-443-06612-4.

`:cite-note-7`!7.`! `F0af`_`[↑`#cite-ref-7]`_`f `:citerefwasfiullah1985`aWasfi F, Ullah M (1985). "Structures passing through the triangular space of the human upper limb". `*Acta Anat (Basel)`*. `!123`! (2): 112–3. `F33f`_`[doi`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Doi_(identifier)]`_`f:10.1159/000146049. `F33f`_`[PMID`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=PMID_(identifier)]`_`f 4061026.

>>External links

• Diagram at microsurgeon.org

• Photo at tufts.edu

• Description at ganfyd.org

• Photo at ithaca.edu

• `*This article incorporates text in the `F33f`_`[public domain`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Public_domain]`_`f from page 445 of the 20th edition of`* `F33f`_`[Gray's Anatomy`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Gray's_Anatomy]`_`f `*(1918)`*

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