PT 620 Brach. Plexus
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| The brachial plexus is comprised of ________ ________ of spinal nerves. | ventral rami
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| The plexus is divided into 5 sections what are they? (Real Tired Drink Coffee Totally Black) | 1. roots 2. trunks 3. divisions 4. cords 5. terminal branches
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| The roots are made up of the ventral rami of what spinal segments? | C5-T1
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| Where is the roots of the brachial plexus located? | proximally between the anterior and middle scalenes
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| What are the three trunks of the brachial plexus? | 1. Upper 2. Middle 3. Lower
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| The upper trunk is made of what roots? | C5 and 6
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| The middle trunk is made up of what roots? | C7
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| The lower trunk is made up of what roots? | C8-T1
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| What is the location when the trunks of the brachial plexus begin? | proximal to the clavicle
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| Where do the divisions of the brachial plexus begin? | under the clavicle
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| Each trunk has an ______ and ________ division | anterior, posterior
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| What join together to for the posterior cord? | all of the posterior divisions
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| The lateral cord is formed by the joining of what divisions? | upper and middle
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| What forms the medial cord? | anterior division of the lower trunk
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| Divisions join together to form? | cords
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| Cords are named according to their relationship to what? | axillary artery
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| What are the three cords? | medial, lateral, and posterior
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| Where do the cords form? where do they head? | deep to the clavicle, they extend distally
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| The three cords terminate as __ branches? | 5
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| The posterior cord forms what two nerves? | axillary and radial
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| The spinal cord fibers of the axillary nerve are? | C5 and 6
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| The spinal cord fibers in the radial nerve are? | C5-T1
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| The lateral cord continues as a nerve and a nerve root? | 1. musculocutaneous n. 2. lateral root of median n.
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| The spinal cord fibers found in musculocutaneous n. are? | C5, 6, 7
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| The lateral root of the median nerve contains what spinal cord fibers? | C6,7
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| The medial cord splits into a nerve and the root of a nerve? | 1. ulnar n. 2. medial root of median n.
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| The ulna nerve has what spinal cord fibers? | C8, T1 and often C7
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| The medial root of the median nerve contains what spinal cord fibers? | C8-T1
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| The lateral root of the median nerve joins with the medial root of the median n. to form the ______ n. | median
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| The median nerve contains what spinal cord fibers? | C6-T1
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| What are the three nerves that branch off from the roots of the brachial plexus? | 1. dorsal scapular 2. phrenic n. 3. long thoracic nerve
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| What nerve branches from the roots of C4, 5? | dorsal scapular
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| The phrenic nerve branches from the roots of what spinal cord segement? | C3, 4, 5
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| The long thoracic nerve branches from the roots of what spinal cord segment? | C5, 6, 7
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| What two branches come off the upper trunk? | 1. nerve to subclavius 2. suprascapular n.
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| What are the spinal cord segments represented in nerve to subclavius? suprascapular? | 1. C5, 6 2. C5, 6
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| Are there an branches from the lower and middle trunk? | NO
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| What is the branch from the lateral cord? | lateral pectoral n.
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| What spinal cord branches are represented in the lateral pectoral n.? | C5,6,7
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| What three branches come from the medial cord? | 1. medial pectoral n 2. medial brachial cutaneous n. 3. medial antebrachial cutaneous n.
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| Each of the branches of the medial cord have what spinal cord segments represented? | C8, T1
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| What are the three branches of the posterior cord? | 1. Upper subscapular 2. Thoracodorsal 3. lower subscapular
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| Name the spinal cord segments in the upper subscapular? thoracodorsal? lower subscapular? | 1. C5 2. C6,7,8 3. C6
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| The posterior cord is made up of what two nn? | radial and axillary
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| The radial n. innervates what two groups of muscles? | 1. extensors 2. supinator
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| The axillary n. goes to what two muscles? | 1. deltoid 2. teres minor
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| The musculocutaneous n. innervates what muscle? what area of skin? | 1. elbow flexors 2. forearm
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| The ulnar nerve innervates... | 2 muscles of the forearm, and Most hand intrinsics
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| The median nerve innervates.... | MOST forearm flexors, and a few hand intrinsics
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| What causes Erb's Palsy? | excessive neck lateral flexion and shoulder depression
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| when is Erb's Palsy most common? | during birth or a stinger in football
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| What nerve roots are usually effected? | Evulsion or stretching of C5 and 6
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| What happens to the Upper Extremity? | waiter's position, arm adducted, internally rotated, wrist flexion, shoulder and elbow extension
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| What is Klumpke's palsy? | injury with arms overhead causing the eveulsion or stretching of C8 and T1
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| What muscles are affected the most? | hand intrinsics
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| The shoulder shrug is what myotome? | C4
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| Shoulder abduction, external rotation is what myotome? | C5
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| The C5,6 myotome is... | elbow flexion
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| Wrist extension is what myotome | C6
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| Elbow extension and wrist flexion is what myotome? | C7
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| Finger flexion is what myotome? | C8
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| T1 myotome is... | finger ABD and ADD
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