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G18 Pectoral Region, Axilla, & Brachial Plexus
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Published
11/02/2024
pneumonic for remembering branches of axillary a
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11/02/2024
the sternoclavicular (SC) joint is a {{c1::synovial saddle}} joint located b/w the {{c1::manubrium}}, {{c1::sternal end of the clavicle}}, and {{c1::1…
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what are the movements of the sternoclavicular (SC) joint (3)?{{c1::elevation/depressionprotraction/retractioncircumduction of pectoral girdle}}
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the sternoclavicular (SC) joint has an {{c1::articular disc}} that separates the joint cavity to provide {{c1::mobility}} and to prevent superior and …
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the acromioclavicular (AC) joint is a {{c1::synovial plane joint}} located between the {{c1::acromial end of the clavicle}} and the {{c1::acromion pro…
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the AC joint has what 3 ligaments?{{c1::acromioclavicular ligamentcoracoclavicular ligamentcoracoacromial ligament}}
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the glenohumeral (GH, shoulder) joint is a {{c1::synovial ball & socket}} joint located b/w the {{c1::glenoid fossa}} and {{c1::humeral head}}&nbs…
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the movements of the glenohumeral joint are:{{c1::flexion/extensionab/adductioncircumductionmedial/lateral rotation}}
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within the GH joint, the glenoid fossa allows increased {{c1::joint mobility}} but reduces {{c1::stability}}
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glenohumeral joint capsule:{{c1::b/w glenoid fossa and anatomical neck of humerus::location}}{{c1::pierced by tendon of long head of biceps brachii::p…
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the coracoacromial arch is formed by the {{c1::acromion}}, {{c1::coracoid process}}, and {{c1::coracromial ligament}} to prevent separation of the {{c…
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which part of the GH/shoulder joint is susceptible to dislocation?
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the tendon of the biceps brachii long head helps hold the {{c1::humeral head}} in place
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shoulder separation vs shoulder dislocation
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the upper limb is innervated by the {{c1::brachial plexus}}, formed by ventral rami of {{c1::C5-8 & T1}}
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in addition to the upper limb, the brachial plexus also provides somatic motor to the {{c1::superficial back}}, {{c1::scapular}}, and {{c1::pecto…
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the brachial plexus is divided into 5 parts:{{c1::5 roots3 trunks6 divisions3 cords5 branches}}
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the 3 trunks of the brachial plexus are:{{c1::upper trunk: union of C5 & C6 roots}}{{c1::middle trunk: C7 root}}{{c1::lower trunk: C8 & T1 roo…
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what are the 6 divisions of the brachial plexus?{{c1::3 anterior: innervate anterior/flexor compartment of upper limb3 posterior: innervate posterior/…
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the 3 cords of the brachial plexus are (named relative to axillary a.):{{c1::lateral: anterior divisions of upper & middle trunk}}{{c1::medial: an…
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what are the 5 terminal braches of the brachial plexus?{{c1::musculocutaneous n.axillary n.radial n.median n.ulnar n. }}
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what makes up the M of the brachial plexus?{{c1::musculocutaneous nervelateral root of median nervemedial root of median nerveulnar nerve}}
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do any additional nerves arise from the divisions of the brachial plexus?{{c1::no}}
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the terminal branches of the brachial plexus supply the most motor and sensory of the {{c1::arm}} and {{c1::forearm}}
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the motor component of the musculocutaneous n. ({{c1::C5-7::spinal nerves}}) supplies the {{c1::anterior compartment mm. of the arm}}
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which nerves from the brachial plexus supply motor only?{{c1::upper subscapular n.thoracodorsal n. (middle subscapular n.)lower subscapular n. }}
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which nerves from the brachial plexus supply sensory only?{{c1::medial cutaneous n. of armmedial cutaneous n. of forearm}}
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the motor component of the radial nerve ({{c1::C5-T1::spinal nerves}}): supplies the {{c1::posterior}} compartment mm. of the {{c1::arm}} and {{c1::fo…
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the motor component of the median. n ({{c1::C6-T1}}) supplies the {{c1::most anterior compartment mm. of the forearm}} and {{c1::5 palm mm. }}
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the sensory component of the median nerve (C6-T1) supplies the {{c1::lateral palm}} & {{c1::first 3.5 digits}}
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the sensory component of the musculocutaneous n. (C5-7) supplies the {{c1::lateral forearm}}
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the sensory component of the radial nerve (C5-T1) supplies the posterior {{c1::arm & forearm}}, and lateral {{c1::dorsum of hand}}
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the motor component of the ulnar nerve (C8, T1) supplies {{c1::most palm mm}}. and {{c1::1.5 anterior compartment mm. of forearm}}
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the sensory component of the ulnar nerve (C8,T1) supplies the {{c1::medial palm}}, {{c1::dorsum of the hand}}, and {{c1::last 1.5 digits}}
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the medial cutaneous n. of arm and forearm (C8-T1) supply the sensory component for the {{c1::medial arm}} and {{c1::medial forearm}}, respectively
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what are the 2 nerves that branch off of the brachial plexus roots? what are their spinal levels?{{c1::dorsal scapular n. - C4, C5 → levator scapulael…
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what are the 2 nerves that branch off of the upper trunk of the brachial plexus?{{c1::suprascapular n.n. to the subclavius m. - both are fro…
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which nerves arise from the lateral cord of the brachial plexus?{{c1::lateral pectoral n.musculocutaneous n.lateral root of median n.}}
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which nerves arise from the medial cord of the brachial plexus?{{c1::medial root of median n.ulnar n.medial cutaneous n. of arm and forearmmedial pect…
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which nerves arise from the posterior cord of the brachial plexus?{{c1::upper subscapular n.lower subscapular n.thoracodorsal n.radial n.axillary n.}}
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the axillary a. is divided into {{c1::3}} parts relative to the {{c1::pectoralis minor m. }}
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the 1st part of the axillary a. is {{c1::medial}} to the pectoralis minor m. & contains the {{c1::superior thoracic a.}}
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the 2nd part of the axillary a. is {{c1::posterior}} to the pectoralis minor m. and contains the {{c1::thoracoacromial a.}} and the {{c1::lateral thor…
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the 3rd part of the axillary a. is {{c1::lateral}} to the pectoralis minor m. and contains the {{c1::subscapular a.}}, the {{c1::anterior circumflex h…
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the subscapular a. branches off to the {{c1::circumflex scapular a.}} and the {{c1::thoracodorsal a. }}
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The pyramidal space where major vessels and nerves pass from the neck to the upper limb is known as the {{c1::axilla}}
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the {{c1::apex of the axilla}} is: between 1st rib, clavicle, and superior border of scapula; entrance from the neck to the axilla
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the {{c1::anterior wall}} of the axilla is made up of the pectoralis major & minor
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the {{c1::medial wall}} of the axilla is the thoracic wall & serratus anterior m.
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the {{c1::lateral wall}} of the axilla: intertubercular groove of humerus
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{{c1::posterior wall}} of the axilla : scapula, subscapularis, teres major & latissimus dorsi mm.
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{{c1::base}} of the axilla: skin & subcutaneous tissue; opens to arm
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the axilla contains (3):{{c1::brachial plexusaxillary a. and v. axillary lymph nodes & vessels}}
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Axilla is the most established region to administer {{c1::brachial plexus block}} with minimal risk
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{{c1::Thoracic outlet syndrome}} refers to entrapment of the nerves or vessels within the axilla. The entrapment can occur at one of the 3 sites: betw…
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{{c1::3 musketeers were assassinated by 5 rats, 4 mice, & 2 unicorns::mnemonic for remembering brachial plexus spinal roots}}
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