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quadrangular space wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 structure toggle structure subsection 1 1 boundaries 1 2 contents 2 clinical significance 3 history 4 see also 5 additional images 6 references 7 external links toggle the table of contents quadrangular space 9 languages العربية español فارسی galego polski português română simple english oʻzbekcha ўзбекча edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia anatomical region of the shoulder joint quadrangular space suprascapular and axillary nerves of right side seen from behind quadrangular space is the lateral space labeled in green at center right axillary nerve is visible entering it the scapular and circumflex arteries quadrangular space is visible but not labeled posterior humeral circumflex artery is visible entering quadrangular space at center right anatomical terminology edit on wikidata the quadrangular space also known as the quadrilateral of velpeau and the foramen humerotricipitale is one of the three spaces in the axillary space the other two spaces are triangular space and triangular interval 1 structure edit boundaries edit the quadrangular space is defined by 2 above superior teres minor muscle 3 4 below inferior teres major muscle 3 medially long head of the triceps brachii muscle lateral margin 3 laterally surgical neck of the humerus 3 anteriorly subscapularis muscle contents edit the quadrangular space transmits the axillary nerve the posterior humeral circumflex artery and the posterior circumflex humeral vein 3 clinical significance edit 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 other common causes of axillary nerve compression at the quadrangular space include local compression due to osteophytes which are common in osteoarthritis shoulder dislocations fractures of the humeral neck repetitive use and external pressure such as from crutches symptoms of axillary nerve compression include axillary nerve related weakness of the deltoid muscle shoulder abduction and teres minor external rotation of the arm as well as numbness of the lateral shoulder the quadrangular space is the most common site of axillary nerve compression 5 6 history edit the quadrangular space is so named because the three skeletal muscles and one long bone that form its boundaries leave a space in the shape of a complete quadrangle the quadrangular space is also known as the quadrilateral space 4 the quadrilateral space of velpeau and the foramen humerotricipitale see also edit quadrilateral space syndrome triangular space triangular interval additional images edit muscles on the dorsum of the scapula and the triceps brachii references edit this article incorporates text in the public domain from page 589 of the 20th edition of gray s anatomy 1918 krishna 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 p 81 isbn 978 81 239 1863 1 see tfd anatomy photo 03 04 0101 suny downstate medical center archived from the original on march 5 2016 scapular region quadrangular space of scapular region 1 2 3 4 5 pinkas d wiater j m 2017 01 01 37 functional anatomy of the shoulder orthopaedic physical therapy secrets 3rd ed elsevier pp 318 326 doi 10 1016 b978 0 323 28683 1 00037 0 isbn 978 0 323 28683 1 1 2 adam mitchell drake richard gray henry david wayne vogl 2005 gray s anatomy for students elsevier churchill livingstone p 649 isbn 0 443 06612 4 silver s ledford cc vogel kj arnold jj 1 march 2021 peripheral nerve entrapment and injury in the upper extremity american family physician 103 5 275 285 pmid 33630556 mangi mohammad danish zadow steven lim wanyin 12 october 2022 nerve entrapment syndromes of the upper limb a pictorial review insights into imaging 13 1 166 doi 10 1186 s13244 022 01305 5 pmc 9556688 pmid 36224295 external links edit quadrangular space at the duke university health system s orthopedics program photo at umich edu diagram at wustl edu photo at tufts edu photo at ithaca edu v t e muscles of the arm shoulder deltoid rotator cuff supraspinatus infraspinatus teres minor subscapularis teres major fascia deltoid fascia supraspinous fascia infraspinous fascia arm compartments anterior coracobrachialis biceps brachialis posterior triceps brachii anconeus articularis cubiti fascia axillary sheath axillary fascia brachial fascia intermuscular septa lateral medial other spaces quadrangular space triangular space triangular interval forearm compartments anterior superficial pronator teres palmaris longus flexor carpi radialis flexor carpi ulnaris flexor digitorum superficialis deep pronator quadratus flexor digitorum profundus flexor pollicis longus posterior superficial mobile wad brachioradialis extensor carpi radialis longus and brevis extensor digitorum extensor digiti minimi extensor carpi ulnaris deep supinator anatomical snuffbox abductor pollicis longus extensor pollicis brevis extensor pollicis longus extensor indicis fascia bicipital aponeurosis common tendons extensor flexor antebrachial fascia other cubital tunnel osborne s ligament hand lateral volar thenar opponens pollicis flexor pollicis brevis abductor pollicis brevis adductor pollicis medial volar hypothenar opponens digiti minimi flexor digiti minimi brevis abductor digiti minimi palmaris brevis intermediate lumbrical interossei dorsal palmar fascia posterior extensor retinaculum extensor expansion anterior flexor retinaculum palmar aponeurosis portal anatomy retrieved from https en wikipedia org w index php title quadrangular_space oldid 1347300758 category upper limb anatomy hidden categories articles with short description short description is different from wikidata articles using infobox templates with no data rows wikipedia articles incorporating text from the 20th edition of gray s anatomy 1918 this page was last edited on 5 april 2026 at 22 19 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy wikipedia is a registered trademark of the wikimedia foundation inc a non profit organization privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie statement mobile view search search toggle the table of contents quadrangular space 9 languages add topic