Term
| Where does the brachial plexus originate? |
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Definition
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Term
| Describe the roots of the brachial plexus (stem from? located? nerves?) |
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Definition
| Stem from C5-T1; located between the anterior and middle scalene muscles; 2 nerves arise from roots - dorsal scapular nerve and long thoracic nerve |
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Term
| Dorsal Scapular Nerve (origin, path, and innervation) |
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Definition
| arises from C5; pierces the middle scalene muscle before innervating the rhomboids and levator scapula |
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Term
| Long Thoracic Nerve (origin, path, and innervation) |
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Definition
| Originates from roots of C5-C7, runs along the superficial aspect of the serratus anterior, which it innervates |
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Term
| Trunks of Brachial Plexus |
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Definition
roots unite to form three trunks that pass through the posterior triangle
superior trunk; middle trunk; inferior trunk |
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Term
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Definition
formed by union of C5-C6; 2 nerves arise from superior trunk
Nerve to subclavius - motor innervation to the subclavius m.
Suprascapular nerve - motor innervation to supraspinatus and infraspinatus m. |
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Term
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Definition
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Term
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Definition
| formed by union of C8 and T1 |
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Term
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Definition
| each trunk divides into anterior and posterior divisions; generally speaking, nerves from anterior divisions supply flexor muscles and nerves from posterior divisions supply extensor m. |
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Term
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Definition
| formed when anterior and posterior divisions unite |
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Term
| Posterior Cord (and nerves formed) |
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Definition
named for location posterior to 2nd part of axillary artery; formed when 3 posterior divisions unite
5 nerves:
upper subscapular nerve
thoracodorsal nerve
lower subscapular nerve
axillary nerve
radial nerve |
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Term
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Definition
| motor n. to subscapularis |
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Term
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Definition
| motor to subscapularis and teres major |
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Term
| thoracodorsal nerve (middle subscapular nerve) |
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Definition
| motor to the latissimus dorsi |
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Term
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Definition
| motor to the teres minor and deltoid; sensory to skin of the shoulder |
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Term
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Definition
| motor to the extensor compartment of arm and forearm; sensory along the posterior aspect of the upper extremity |
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Term
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Definition
named for location to 2nd part of axillary artery; anterior divisions of upper and middle trunk join to form lateral cord;
3 branches:
lateral pectoral nerve
musculocutaneous nerve
lateral portion to the median nerve |
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Term
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Definition
| motor to the pectoralis major and minor (via the ansa pectoralis); located superomedial to pectoralis minor |
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Term
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Definition
| pierces coracobrachialis; motor to coracobrachialis, biceps brachii and brachialis. It terminates as lateral antebrachial cutaneous n. |
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Term
| Lateral portion of the median nerve |
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Definition
| joins with the medial part of the median nerve to form the large median nerve |
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Term
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Definition
named for the location to the 2nd part of the axillary artery; anterior division of inferior trunk continues as medial cord;
5 branches:
medial pectoral nerve
medial brachial cutaneous nerve
medial antebrachial cutaneous nerve
ulnar nerve
medial portion of the median nerve |
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Term
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Definition
| pierces pectoralis minor; motor to pectoralis major and minor via the ansa pectoralis |
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Term
| medial brachial cutaneous nerve |
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Definition
| sensory to the skin on medial side of arm (brachium) and superior part of the forearm (antebrachium) |
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Term
| medial antebrachial cutaneous nerve |
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Definition
| sensory to the skin on the medial side of the forearm (antebrachium) |
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Term
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Definition
| motor to flexor carpi ulnaris and half of flexor digitorum profundus in the anterior forearm; sensory to skin on medial side of hand |
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Term
| medial portion of the median nerve |
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Definition
| forms with lateral portion of the median nerve to form the large median nerve |
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Term
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Definition
| motor innervation to most of the flexor muscles in the forearm, five muscles in the hand, and sensory innervation to part of the skin of the hand |
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