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Quadrilateral space syndrome is a rotator cuff denervation syndrome in which the axillary nerve is compressed at the quadrilateral space of the rotator cuff. Cause
The quadrangular space is a clinically important anatomic space in the arm as it provides the anterior regions of the axilla a passageway to the posterior regions. In the quadrangular space, the axillary nerve and the posterior humeral circumflex artery can be compressed or damaged due to space-occupying lesions or disruption in the anatomy due to trauma.
Triangular Interval Syndrome (TIS) was described as a differential diagnosis for radicular pain in the upper extremity. [6] It is a condition where the radial nerve is entrapped in the triangular interval resulting in upper extremity radicular pain. The radial nerve and profunda brachii pass through the triangular interval and are hence vulnerable.
The true axilla is a conical space with its apex at the Cervico-axillary Canal, Base at the axillary fascia and skin of the armpit. When viewed in an axillary plane (axillary cut), it is more triangle with: Medial Wall: Serratus Anterior, Anterior Wall: pectoral muscles, Posterior Wall: subscapularis muscle, where the "apex" of the triangle is the humerus [4] [5]
Fibrous bands, cysts of the glenoid labrum, lipoma or dilated veins can occupy the quadrilateral space pathologically. Similar symptoms are common with anterior shoulder dislocation, humeral neck fracture, brachial plexus injury and thoracic outlet and inlet syndrome. It is important to include those pathologies for a complete as possible ...
The scenario, in which space debris collides and creates more debris, is called Kessler Syndrome. Eventually, the proliferation could make Earth’s orbit too clogged for satellites to orbit ...
The triangular space (also known as the medial triangular space, [1] upper triangular space, [2] medial axillary space or foramen omotricipitale [3]) is one of the three spaces found at the axillary space. The other two spaces are the quadrangular space and the triangular interval. [4]
The phenomenon is known as Kessler syndrome, named after retired NASA engineer Don Kessler, who first proposed it mechanisms in 1978. RELATED STORY | Why Space Junk Is A Compounding Issue For ...