What are the contents of lower triangular space?

Triangular interval (lower triangular space) It is bordered laterally by the shaft of the humerus and medially by the lateral border of the long head of triceps brachii muscle. The profunda brachii artery and the radial nerve pass through this space to enter the arm.

What nerve runs through the triangular space?

radial nerve
The radial nerve and profunda brachii artery pass through the triangular interval.

What passes through the quadrangular space?

axillary nerve. passes through the quadrilateral space on its path to innervate the teres minor and deltoid and provide sensation to the lateral arm.

posterior humeral circumflex artery.

What is located in triangular space?

The triangular space (medial axillary space, lat. foramen omotricipitale) is bounded by the teres minor superiorly, the teres major inferiorly, and the long head of the triceps brachii laterally. It contains the scapular circumflex vessels (axillary artery – subscapular artery – scapular circumflex artery).

What is within the quadrangular space?

Three muscles directly comprise the quadrangular space; the teres minor, teres major, and long head of the triceps brachii. The teres minor originates on the lateral border of the scapula, inserts on the greater tubercle of the humerus, and functions with glenohumeral joint external rotation.

Where is the triangular space?

axilla
The triangular interval (also known as the lateral triangular space, lower triangular space, and triceps hiatus) is a space found in the axilla. It is one of the three intermuscular spaces found in the axillary space.

What passes through the upper triangular space?

scapular circumflex vessels
It contains the scapular circumflex vessels. Unlike the quadrangular space or the triangular interval, no major nerve passes through the triangular space.

Where is lower triangular space?

What runs in the quadrangular space?

The quadrangular space transmits the axillary nerve, and the posterior humeral circumflex artery.

What is Intermuscular space?

The Triangular Intermuscular Space is defined by borders of the teres major, teres minor, and long head of the triceps. Through this space pass the descending circumflex scapular artery, vena comitants, and lymphatics.

What is quadrilateral space syndrome?

Quadrilateral space syndrome (QSS) is a rare disorder characterized by axillary nerve and posterior humeral circumflex artery (PHCA) compression within the quadrilateral space. Impingement is most frequently due to trauma, fibrous bands, or hypertrophy of one of the muscular borders.

What is the intermuscular septum?

1. A connective tissue septum that separates two muscles, esp. one from which muscles may take their origin.

What is quadrilateral paresthesia?

Quadrilateral space syndrome is an uncommon cause of paresthesia and an underdiagnosed cause of digital ischemia in overhead athletes. Quadrilateral space syndrome can present with neurogenic symp- toms (pain and weakness) secondary to axillary nerve compression.

How common is quadrilateral space syndrome?

Quadrilateral space (QS) syndrome (QSS) is a relatively rare condition in which the axillary nerve and the posterior humeral circumflex artery are compressed within the QS. Fibrous bands are most commonly implicated as the cause, with true space-occupying lesions being less common.

What is area under armpit called?

The armpit is also called the axilla. Blood and lymph vessels serving the arm travel through the armpit. There are more than 20 lymph nodes (small lumps of tissue that are part of the body’s lymphatic system, which helps fight infection) in the armpit.

What is the clavipectoral fascia?

The clavipectoral fascia (costocoracoid membrane; coracoclavicular fascia) is a strong fascia situated under cover of the clavicular portion of the pectoralis major. It occupies the interval between the pectoralis minor and subclavius, and protects the axillary vessels and nerves.

What does Intermuscular mean?

lying between and separating muscles
Medical Definition of intermuscular : lying between and separating muscles intermuscular fat.

What is the shape of the axilla?

The axilla is pyramidal in shape with its apex opening superiorly towards the base of the neck between the subclavius muscle, first rib, and clavicle.

What passes through the triangular interval of the axilla?

This space is in the inferior to the posterior wall of the axilla. The triangular interval is bounded medially by long head of triceps brachii, laterally by medial border of humerus (some say the lateral head of the triceps), and superiorly by teres major. The radial nerve and profunda brachii artery and vein passes through this space.

How do structures leave the axilla?

There are three main routes by which structures leave the axilla. The main route of exit is immediately inferiorly and laterally, into the upper limb. The majority of contents of the axilla region leave by this method. Another pathway is via the quadrangular space.

Is the axilla more triangle or conical?

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 t…