Triangular Space

Triangular Space

Question Write briefly about the upper triangular space.
Answer:

The upper triangular space is one of the subscapular intermuscular spaces present in the region of axilla.

Upper Triangular Space Boundaries

Superomedial:

Teres minor

Lateral:

Long head of the triceps brachii

Inferior:

Teres major

Structure passing through the space

triangular space anatomy

The circumflex scapular artery which interrupts the origin of the teres minor to reach the infraspinous fossa.

Upper Triangular Space Applied anatomy

The circumflex scapular artery anastomoses with the suprascapular and deep branch of the transverse cervical arteries to form an important arterial anastomosis around scapula.

Question 8. Write briefly about the lower triangular space.
Answer.

The lower triangular space is one of the subscapular intramuscular spaces.

Lower Triangular Space Boundaries

Medial:

Long head of the triceps brachii

Lateral:

Shaft of humerus

Superior:

Teres major

contents of triangular space

Structures passing through this space

• Radial nerve
• Profunda brachii vessels

Lower Triangular Space Applied anatomy

The fracture of middle-third of humerus may damage radial nerve leading to wrist drop.