The axilla is found inferior to the glenohumeral joint<\/strong> and superior to the axillary fascia<\/strong>, serving as a communication between the arm, pectoral, deltoid, and scapular regions, thorax, and neck.<\/p>\n\n\n\nDepending on the position of the arm, the axilla can be exposed with the axillary fossa<\/strong> (the concave part found inferiorly and covered by hairy skin) clearly visible if the arm is abducted, or hidden if the arm is adducted.<\/li>The anterior <\/strong>and posterior axillary folds<\/strong> mark the outer boundaries of the axillary fossa; they are clearly visible and palpable. The anterior fold is formed by the lateral edge of the pectoralis major muscle, and is more superior in position than the inferior one<\/li>The posterior fold is formed by the lateral edges of the latissimus dorsi and teres major muscles.<\/li><\/ul><\/li><\/ul>\n\n\n<\/span>\nBoundaries<\/h4>\n<\/span>\n\n\n\n\nThe fossa is bound by 4 walls, a roof, and a floor:<\/p>\n\n\n\nAnterior wall<\/strong>Pectoralis muscles<\/li>Clavipectoral fascia<\/li>Subclavius muscle<\/li><\/ul><\/li>Posterior wall<\/strong>Subscapularis muscle<\/li>Teres major muscle<\/li>Latissimus dorsi muscle<\/li>The long head of the triceps brachii muscle<\/li><\/ul><\/li>Medial wall<\/strong>Ribs I-IV and their intercostal muscles<\/li>Serratus anterior muscle<\/li><\/ul><\/li>Lateral wall<\/strong>Humerus (intertubercular sulcus)<\/li><\/ul><\/li>Roof<\/strong> (also known as the axillary inlet<\/strong>)1st rib<\/li>Clavicle<\/li>Superior edge of the scapula<\/li>The apex of the inlet is formed by the medial aspect of the coracoid process of the scapula<\/li><\/ul><\/li>Floor<\/strong> (also known as the base<\/strong>, axillary outlet<\/strong>, or axillary fossa<\/strong>)The skin, subcutaneous tissue, and fascia of the axilla (on the medial part), and opening into the arm (on the lateral part)<\/li>Bound by the anterior and posterior axillary folds<\/li><\/ul><\/li><\/ul>\n<\/div>\n\n\n\n\n<\/a>Figure 3. Schematic drawing of the axilla<\/strong><\/figcaption><\/figure><\/div>\n<\/div>\n<\/div>\n\n\n<\/span>\nContents<\/h4>\n<\/span>\n\n\nAxillary artery and its branches<\/li>Axillary vein and its branches<\/li>The cords and branches of the brachial plexus<\/li>Intercostobrachial nerve<\/li>Axillary lymph nodes and vessels<\/li>Adipose and loose connective tissue<\/li>The axillary process of the breast<\/li>Proximal parts of the biceps bracii and coracobrachialis muscles<\/li><\/ul>\n\n\n<\/span>\nDetailed information<\/h4>\n<\/span>\n\n\nThe axillary artery<\/strong> is formed as the subclavian artery passes rib I to enter the axilla through its roof. Within the axilla, it is found posterior to the axillary vein.<\/li>Similarly, the axillary vein<\/strong> becomes the subclavian vein as it exits the axilla. Within it, the axillary vein is the most anterior vessel.The cephalic vein<\/strong> ascends from the arm and passes along the deltopectoral groove, reaching the midclavicular line, and then pierces the clavipectoral fascia, to join the axillary vein, at the clavipectoral triangle (described below).<\/li><\/ul><\/li>The trunks of the brachial plexus<\/strong> lie posterior to the axillary artery, except for the inferior trunk (which forms the medial cord within the fossa) which passes inferiorly to it.<\/li>The axillary artery<\/strong> and brachial plexus<\/strong> are engulfed by the axillary sheath<\/strong>, an extension of the prevertebral fascia. The axillary vein<\/strong> and lymphatics <\/strong>are not contained within the sheath (to allow for their expansion in case of increased venous and lymphatic pressure).<\/li>The intercostobrachial nerve<\/strong> pierces the medial wall, passing along the thoracic wall to supply the axio-appendicular muscles (serratus anterior and latissimus dorsi muscles).<\/li>The axillary process of the breast<\/strong> (also known as the axillary tail<\/strong>, or Spence’s tail<\/strong>) is a part of the breast that extends into the axilla.<\/li>The long thoracic nerve<\/strong> lies on the medial wall of the fossa on the serratus anterior muscle.<\/li><\/ul>\n\n\n<\/span>\nGateways<\/h3>\n<\/span>\n\n\nThe axilla communicates with the surrounding structures through five main gateways that pierce its walls and boundaries:<\/p>\n\n\n\nGateway<\/th>Boundary<\/th>Structure<\/th>Contents<\/th><\/tr><\/thead>Clavipectoral triangle<\/strong><\/td>Anterior wall (of the axilla)<\/td>Pectoral region<\/td>Cephalic vein, thoracoacromial artery, lateral pectoral nerve<\/td><\/tr>Quadrangular space<\/strong><\/td>Posterior wall<\/td>Scapular and deltoid regions<\/td>Circumflex scapular artery and vein<\/td><\/tr>Triangular space<\/strong><\/td>Posterior wall<\/td>Scapular region<\/td>Posterior circumflex humeral artery and axillary nerve<\/td><\/tr>Triangular interval<\/strong><\/td>Lateral wall<\/td>Arm<\/td>Radial nerve<\/td><\/tr>Cervicoaxillary canal<\/strong><\/td>Roof<\/td>Root of the neck<\/td>Axillary artery and vein, brachial plexus, lymphatics<\/td><\/tr><\/tbody><\/table>Table 1. Gateways of the axilla<\/strong><\/figcaption><\/figure>\n\n\n<\/span>\nClavipectoral triangle<\/h4>\n<\/span>\n\n\nThe clavipectoral triangle (also known as the deltopectoral triangle<\/strong>) allows for the passage of the cephalic vein<\/strong>, thoracoacromial artery<\/strong>, and lateral pectoral nerve<\/strong>. The structures pass between the axilla and pectoral region through the anterior wall, piercing the clavipectoral fascia at the midclavicular line, inferior to the clavicle.<\/p>\n\n\n\nThe clavipectoral triangle is formed between the following structures:<\/p>\n\n\n\nPectoralis major muscle<\/li>Deltoid muscle<\/li>Clavicle<\/li><\/ul>\n\n\n<\/span>\nTriangular space<\/h4>\n<\/span>\n\n\nThe triangular space (also known as the medial axillary hiatus<\/strong> or omotricipital foramen<\/strong>) allows the passage of the circumflex scapular artery and vein<\/strong> between the axilla and pectoral region through the posterior wall. <\/p>\n\n\n\nThe triangular space is formed between the following structures:<\/p>\n\n\n\nMedial edge of the long head of the triceps brachii muscle<\/li>Superior edge of the teres major muscle<\/li>Inferior edge of the subscapularis muscle<\/li><\/ul>\n\n\n<\/span>\nQuadrangular space<\/h4>\n<\/span>\n\n\nThe quadrangular space (also known as the lateral axillary hiatus<\/strong>) allows the passage of the posterior circumflex humeral artery<\/strong> and axillary nerve<\/strong> between the axilla and the scapular and deltoid regions through the posterior wall.<\/p>\n\n\n\nThe quadrangular space is formed between the following structures:<\/p>\n\n\n\nInferior edge of the subscapularis muscle<\/li>Superior edge of the teres major muscle<\/li>Lateral edge of the long head of the triceps brachii muscle<\/li>Humerus (surgical neck)<\/li><\/ul>\n\n\n<\/span>\nTriangular interval<\/h4>\n<\/span>\n\n\nThe triangular interval allows the passage of the radial nerve<\/strong> between the axilla and the posterior compartment of the arm through the lateral wall. <\/p>\n\n\n\nThe triangular interval is formed between the following structures:<\/p>\n\n\n\nLateral edge of the long head of the triceps brachii muscle<\/li>Inferior edge of the teres major muscle<\/li>Humerus (shaft)<\/li><\/ul>\n\n\n<\/span>\nCervicoaxillary canal<\/h4>\n<\/span>\n\n\nThe cervicoaxillary canal is essentially the roof of the axilla, allowing the passage of the axillary sheath<\/strong> (which contains the axillary artery<\/strong> and brachial plexus<\/strong>), axillary vein, and lymphatics, between the axilla and the root of the neck. <\/p>\n\n\n\nSince the cervicoaxillary canal is essentially the roof of the axilla, its borders are the same (1st rib, clavicle, superior edge of the scapula).<\/p>\n<\/span>Description<\/h4>Boundaries<\/h4>Contents<\/h4>Detailed information<\/h4>Gateways<\/h3>Clavipectoral triangle<\/h4>Triangular space<\/h4>Quadrangular space<\/h4>Triangular interval<\/h4>Cervicoaxillary canal<\/h4><\/div>","protected":false},"excerpt":{"rendered":"Description The axilla is found inferior to the glenohumeral joint and superior to the axillary fascia, serving as a communication between the arm, pectoral, deltoid, and scapular regions, thorax, and neck. Depending on the position of the arm, the axilla can be exposed with the axillary fossa (the concave part found inferiorly and covered by […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3462,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3465","page","type-page","status-publish","hentry"],"yoast_head":"\nAxilla – Meddists<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/meddists.com\/learn\/pre-clinical\/anatomy\/upper-limb\/axilla\/\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" 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The fossa is bound by 4 walls, a roof, and a floor:<\/p>\n\n\n\n
The axilla communicates with the surrounding structures through five main gateways that pierce its walls and boundaries:<\/p>\n\n\n\nGateway<\/th>Boundary<\/th>Structure<\/th>Contents<\/th><\/tr><\/thead>Clavipectoral triangle<\/strong><\/td>Anterior wall (of the axilla)<\/td>Pectoral region<\/td>Cephalic vein, thoracoacromial artery, lateral pectoral nerve<\/td><\/tr>Quadrangular space<\/strong><\/td>Posterior wall<\/td>Scapular and deltoid regions<\/td>Circumflex scapular artery and vein<\/td><\/tr>Triangular space<\/strong><\/td>Posterior wall<\/td>Scapular region<\/td>Posterior circumflex humeral artery and axillary nerve<\/td><\/tr>Triangular interval<\/strong><\/td>Lateral wall<\/td>Arm<\/td>Radial nerve<\/td><\/tr>Cervicoaxillary canal<\/strong><\/td>Roof<\/td>Root of the neck<\/td>Axillary artery and vein, brachial plexus, lymphatics<\/td><\/tr><\/tbody><\/table>Table 1. Gateways of the axilla<\/strong><\/figcaption><\/figure>\n\n\n<\/span>\nClavipectoral triangle<\/h4>\n<\/span>\n\n\nThe clavipectoral triangle (also known as the deltopectoral triangle<\/strong>) allows for the passage of the cephalic vein<\/strong>, thoracoacromial artery<\/strong>, and lateral pectoral nerve<\/strong>. The structures pass between the axilla and pectoral region through the anterior wall, piercing the clavipectoral fascia at the midclavicular line, inferior to the clavicle.<\/p>\n\n\n\nThe clavipectoral triangle is formed between the following structures:<\/p>\n\n\n\nPectoralis major muscle<\/li>Deltoid muscle<\/li>Clavicle<\/li><\/ul>\n\n\n<\/span>\nTriangular space<\/h4>\n<\/span>\n\n\nThe triangular space (also known as the medial axillary hiatus<\/strong> or omotricipital foramen<\/strong>) allows the passage of the circumflex scapular artery and vein<\/strong> between the axilla and pectoral region through the posterior wall. <\/p>\n\n\n\nThe triangular space is formed between the following structures:<\/p>\n\n\n\nMedial edge of the long head of the triceps brachii muscle<\/li>Superior edge of the teres major muscle<\/li>Inferior edge of the subscapularis muscle<\/li><\/ul>\n\n\n<\/span>\nQuadrangular space<\/h4>\n<\/span>\n\n\nThe quadrangular space (also known as the lateral axillary hiatus<\/strong>) allows the passage of the posterior circumflex humeral artery<\/strong> and axillary nerve<\/strong> between the axilla and the scapular and deltoid regions through the posterior wall.<\/p>\n\n\n\nThe quadrangular space is formed between the following structures:<\/p>\n\n\n\nInferior edge of the subscapularis muscle<\/li>Superior edge of the teres major muscle<\/li>Lateral edge of the long head of the triceps brachii muscle<\/li>Humerus (surgical neck)<\/li><\/ul>\n\n\n<\/span>\nTriangular interval<\/h4>\n<\/span>\n\n\nThe triangular interval allows the passage of the radial nerve<\/strong> between the axilla and the posterior compartment of the arm through the lateral wall. <\/p>\n\n\n\nThe triangular interval is formed between the following structures:<\/p>\n\n\n\nLateral edge of the long head of the triceps brachii muscle<\/li>Inferior edge of the teres major muscle<\/li>Humerus (shaft)<\/li><\/ul>\n\n\n<\/span>\nCervicoaxillary canal<\/h4>\n<\/span>\n\n\nThe cervicoaxillary canal is essentially the roof of the axilla, allowing the passage of the axillary sheath<\/strong> (which contains the axillary artery<\/strong> and brachial plexus<\/strong>), axillary vein, and lymphatics, between the axilla and the root of the neck. <\/p>\n\n\n\nSince the cervicoaxillary canal is essentially the roof of the axilla, its borders are the same (1st rib, clavicle, superior edge of the scapula).<\/p>\n<\/span>Description<\/h4>Boundaries<\/h4>Contents<\/h4>Detailed information<\/h4>Gateways<\/h3>Clavipectoral triangle<\/h4>Triangular space<\/h4>Quadrangular space<\/h4>Triangular interval<\/h4>Cervicoaxillary canal<\/h4><\/div>","protected":false},"excerpt":{"rendered":"Description The axilla is found inferior to the glenohumeral joint and superior to the axillary fascia, serving as a communication between the arm, pectoral, deltoid, and scapular regions, thorax, and neck. Depending on the position of the arm, the axilla can be exposed with the axillary fossa (the concave part found inferiorly and covered by […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3462,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3465","page","type-page","status-publish","hentry"],"yoast_head":"\nAxilla – Meddists<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/meddists.com\/learn\/pre-clinical\/anatomy\/upper-limb\/axilla\/\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" 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The clavipectoral triangle (also known as the deltopectoral triangle<\/strong>) allows for the passage of the cephalic vein<\/strong>, thoracoacromial artery<\/strong>, and lateral pectoral nerve<\/strong>. The structures pass between the axilla and pectoral region through the anterior wall, piercing the clavipectoral fascia at the midclavicular line, inferior to the clavicle.<\/p>\n\n\n\nThe clavipectoral triangle is formed between the following structures:<\/p>\n\n\n\nPectoralis major muscle<\/li>Deltoid muscle<\/li>Clavicle<\/li><\/ul>\n\n\n<\/span>\nTriangular space<\/h4>\n<\/span>\n\n\nThe triangular space (also known as the medial axillary hiatus<\/strong> or omotricipital foramen<\/strong>) allows the passage of the circumflex scapular artery and vein<\/strong> between the axilla and pectoral region through the posterior wall. <\/p>\n\n\n\nThe triangular space is formed between the following structures:<\/p>\n\n\n\nMedial edge of the long head of the triceps brachii muscle<\/li>Superior edge of the teres major muscle<\/li>Inferior edge of the subscapularis muscle<\/li><\/ul>\n\n\n<\/span>\nQuadrangular space<\/h4>\n<\/span>\n\n\nThe quadrangular space (also known as the lateral axillary hiatus<\/strong>) allows the passage of the posterior circumflex humeral artery<\/strong> and axillary nerve<\/strong> between the axilla and the scapular and deltoid regions through the posterior wall.<\/p>\n\n\n\nThe quadrangular space is formed between the following structures:<\/p>\n\n\n\nInferior edge of the subscapularis muscle<\/li>Superior edge of the teres major muscle<\/li>Lateral edge of the long head of the triceps brachii muscle<\/li>Humerus (surgical neck)<\/li><\/ul>\n\n\n<\/span>\nTriangular interval<\/h4>\n<\/span>\n\n\nThe triangular interval allows the passage of the radial nerve<\/strong> between the axilla and the posterior compartment of the arm through the lateral wall. <\/p>\n\n\n\nThe triangular interval is formed between the following structures:<\/p>\n\n\n\nLateral edge of the long head of the triceps brachii muscle<\/li>Inferior edge of the teres major muscle<\/li>Humerus (shaft)<\/li><\/ul>\n\n\n<\/span>\nCervicoaxillary canal<\/h4>\n<\/span>\n\n\nThe cervicoaxillary canal is essentially the roof of the axilla, allowing the passage of the axillary sheath<\/strong> (which contains the axillary artery<\/strong> and brachial plexus<\/strong>), axillary vein, and lymphatics, between the axilla and the root of the neck. <\/p>\n\n\n\nSince the cervicoaxillary canal is essentially the roof of the axilla, its borders are the same (1st rib, clavicle, superior edge of the scapula).<\/p>\n<\/span>Description<\/h4>Boundaries<\/h4>Contents<\/h4>Detailed information<\/h4>Gateways<\/h3>Clavipectoral triangle<\/h4>Triangular space<\/h4>Quadrangular space<\/h4>Triangular interval<\/h4>Cervicoaxillary canal<\/h4><\/div>","protected":false},"excerpt":{"rendered":"Description The axilla is found inferior to the glenohumeral joint and superior to the axillary fascia, serving as a communication between the arm, pectoral, deltoid, and scapular regions, thorax, and neck. Depending on the position of the arm, the axilla can be exposed with the axillary fossa (the concave part found inferiorly and covered by […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3462,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3465","page","type-page","status-publish","hentry"],"yoast_head":"\nAxilla – Meddists<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/meddists.com\/learn\/pre-clinical\/anatomy\/upper-limb\/axilla\/\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" 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The clavipectoral triangle is formed between the following structures:<\/p>\n\n\n\n
The triangular space (also known as the medial axillary hiatus<\/strong> or omotricipital foramen<\/strong>) allows the passage of the circumflex scapular artery and vein<\/strong> between the axilla and pectoral region through the posterior wall. <\/p>\n\n\n\nThe triangular space is formed between the following structures:<\/p>\n\n\n\nMedial edge of the long head of the triceps brachii muscle<\/li>Superior edge of the teres major muscle<\/li>Inferior edge of the subscapularis muscle<\/li><\/ul>\n\n\n<\/span>\nQuadrangular space<\/h4>\n<\/span>\n\n\nThe quadrangular space (also known as the lateral axillary hiatus<\/strong>) allows the passage of the posterior circumflex humeral artery<\/strong> and axillary nerve<\/strong> between the axilla and the scapular and deltoid regions through the posterior wall.<\/p>\n\n\n\nThe quadrangular space is formed between the following structures:<\/p>\n\n\n\nInferior edge of the subscapularis muscle<\/li>Superior edge of the teres major muscle<\/li>Lateral edge of the long head of the triceps brachii muscle<\/li>Humerus (surgical neck)<\/li><\/ul>\n\n\n<\/span>\nTriangular interval<\/h4>\n<\/span>\n\n\nThe triangular interval allows the passage of the radial nerve<\/strong> between the axilla and the posterior compartment of the arm through the lateral wall. <\/p>\n\n\n\nThe triangular interval is formed between the following structures:<\/p>\n\n\n\nLateral edge of the long head of the triceps brachii muscle<\/li>Inferior edge of the teres major muscle<\/li>Humerus (shaft)<\/li><\/ul>\n\n\n<\/span>\nCervicoaxillary canal<\/h4>\n<\/span>\n\n\nThe cervicoaxillary canal is essentially the roof of the axilla, allowing the passage of the axillary sheath<\/strong> (which contains the axillary artery<\/strong> and brachial plexus<\/strong>), axillary vein, and lymphatics, between the axilla and the root of the neck. <\/p>\n\n\n\nSince the cervicoaxillary canal is essentially the roof of the axilla, its borders are the same (1st rib, clavicle, superior edge of the scapula).<\/p>\n<\/span>Description<\/h4>Boundaries<\/h4>Contents<\/h4>Detailed information<\/h4>Gateways<\/h3>Clavipectoral triangle<\/h4>Triangular space<\/h4>Quadrangular space<\/h4>Triangular interval<\/h4>Cervicoaxillary canal<\/h4><\/div>","protected":false},"excerpt":{"rendered":"Description The axilla is found inferior to the glenohumeral joint and superior to the axillary fascia, serving as a communication between the arm, pectoral, deltoid, and scapular regions, thorax, and neck. Depending on the position of the arm, the axilla can be exposed with the axillary fossa (the concave part found inferiorly and covered by […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3462,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3465","page","type-page","status-publish","hentry"],"yoast_head":"\nAxilla – Meddists<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/meddists.com\/learn\/pre-clinical\/anatomy\/upper-limb\/axilla\/\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" 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The triangular space is formed between the following structures:<\/p>\n\n\n\n
The quadrangular space (also known as the lateral axillary hiatus<\/strong>) allows the passage of the posterior circumflex humeral artery<\/strong> and axillary nerve<\/strong> between the axilla and the scapular and deltoid regions through the posterior wall.<\/p>\n\n\n\nThe quadrangular space is formed between the following structures:<\/p>\n\n\n\nInferior edge of the subscapularis muscle<\/li>Superior edge of the teres major muscle<\/li>Lateral edge of the long head of the triceps brachii muscle<\/li>Humerus (surgical neck)<\/li><\/ul>\n\n\n<\/span>\nTriangular interval<\/h4>\n<\/span>\n\n\nThe triangular interval allows the passage of the radial nerve<\/strong> between the axilla and the posterior compartment of the arm through the lateral wall. <\/p>\n\n\n\nThe triangular interval is formed between the following structures:<\/p>\n\n\n\nLateral edge of the long head of the triceps brachii muscle<\/li>Inferior edge of the teres major muscle<\/li>Humerus (shaft)<\/li><\/ul>\n\n\n<\/span>\nCervicoaxillary canal<\/h4>\n<\/span>\n\n\nThe cervicoaxillary canal is essentially the roof of the axilla, allowing the passage of the axillary sheath<\/strong> (which contains the axillary artery<\/strong> and brachial plexus<\/strong>), axillary vein, and lymphatics, between the axilla and the root of the neck. <\/p>\n\n\n\nSince the cervicoaxillary canal is essentially the roof of the axilla, its borders are the same (1st rib, clavicle, superior edge of the scapula).<\/p>\n<\/span>Description<\/h4>Boundaries<\/h4>Contents<\/h4>Detailed information<\/h4>Gateways<\/h3>Clavipectoral triangle<\/h4>Triangular space<\/h4>Quadrangular space<\/h4>Triangular interval<\/h4>Cervicoaxillary canal<\/h4><\/div>","protected":false},"excerpt":{"rendered":"Description The axilla is found inferior to the glenohumeral joint and superior to the axillary fascia, serving as a communication between the arm, pectoral, deltoid, and scapular regions, thorax, and neck. Depending on the position of the arm, the axilla can be exposed with the axillary fossa (the concave part found inferiorly and covered by […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3462,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3465","page","type-page","status-publish","hentry"],"yoast_head":"\nAxilla – Meddists<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/meddists.com\/learn\/pre-clinical\/anatomy\/upper-limb\/axilla\/\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" 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The quadrangular space is formed between the following structures:<\/p>\n\n\n\n
The triangular interval allows the passage of the radial nerve<\/strong> between the axilla and the posterior compartment of the arm through the lateral wall. <\/p>\n\n\n\nThe triangular interval is formed between the following structures:<\/p>\n\n\n\nLateral edge of the long head of the triceps brachii muscle<\/li>Inferior edge of the teres major muscle<\/li>Humerus (shaft)<\/li><\/ul>\n\n\n<\/span>\nCervicoaxillary canal<\/h4>\n<\/span>\n\n\nThe cervicoaxillary canal is essentially the roof of the axilla, allowing the passage of the axillary sheath<\/strong> (which contains the axillary artery<\/strong> and brachial plexus<\/strong>), axillary vein, and lymphatics, between the axilla and the root of the neck. <\/p>\n\n\n\nSince the cervicoaxillary canal is essentially the roof of the axilla, its borders are the same (1st rib, clavicle, superior edge of the scapula).<\/p>\n<\/span>Description<\/h4>Boundaries<\/h4>Contents<\/h4>Detailed information<\/h4>Gateways<\/h3>Clavipectoral triangle<\/h4>Triangular space<\/h4>Quadrangular space<\/h4>Triangular interval<\/h4>Cervicoaxillary canal<\/h4><\/div>","protected":false},"excerpt":{"rendered":"Description The axilla is found inferior to the glenohumeral joint and superior to the axillary fascia, serving as a communication between the arm, pectoral, deltoid, and scapular regions, thorax, and neck. 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The triangular interval is formed between the following structures:<\/p>\n\n\n\n
The cervicoaxillary canal is essentially the roof of the axilla, allowing the passage of the axillary sheath<\/strong> (which contains the axillary artery<\/strong> and brachial plexus<\/strong>), axillary vein, and lymphatics, between the axilla and the root of the neck. <\/p>\n\n\n\nSince the cervicoaxillary canal is essentially the roof of the axilla, its borders are the same (1st rib, clavicle, superior edge of the scapula).<\/p>\n<\/span>Description<\/h4>Boundaries<\/h4>Contents<\/h4>Detailed information<\/h4>Gateways<\/h3>Clavipectoral triangle<\/h4>Triangular space<\/h4>Quadrangular space<\/h4>Triangular interval<\/h4>Cervicoaxillary canal<\/h4><\/div>","protected":false},"excerpt":{"rendered":"Description The axilla is found inferior to the glenohumeral joint and superior to the axillary fascia, serving as a communication between the arm, pectoral, deltoid, and scapular regions, thorax, and neck. Depending on the position of the arm, the axilla can be exposed with the axillary fossa (the concave part found inferiorly and covered by […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3462,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3465","page","type-page","status-publish","hentry"],"yoast_head":"\nAxilla – Meddists<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/meddists.com\/learn\/pre-clinical\/anatomy\/upper-limb\/axilla\/\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" 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Since the cervicoaxillary canal is essentially the roof of the axilla, its borders are the same (1st rib, clavicle, superior edge of the scapula).<\/p>\n<\/span>
Description The axilla is found inferior to the glenohumeral joint and superior to the axillary fascia, serving as a communication between the arm, pectoral, deltoid, and scapular regions, thorax, and neck. Depending on the position of the arm, the axilla can be exposed with the axillary fossa (the concave part found inferiorly and covered by […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3462,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3465","page","type-page","status-publish","hentry"],"yoast_head":"\n
![\"\"](\"https:\/\/meddists.com\/learn\/wp-content\/uploads\/2021\/01\/anterior-axilla.png\")
<\/a>