Flashcards
Median nerve
Flashcards do conjunto (9)
- 1Median nerveExtends from the medial and lateral cords of the brachial plexus with NR contribution from C5-T1.
- 2Pathway1. C5 to T1 extending from medial and lateral cords of the brachial plexus
2. Travels down the anteromedial arm through a septum of fascia btwn biceps and triceps
3. it then passes under the ligament of struthers (band at distal end of anterior humerus to pronator teres)
4. courses between the 2 heads of pronator teres and under superficial flexors of wrist to carpal tunnel
5. through the carpal tunnel into the palmar aspect of thumb, index, middle part of ring finger (3 1/2 digits) - 3muscle innervations-pronator teres
-Palmaris longus
-Flexor digitorum superficialis
-pronator quadratus
-opponens pollicus
-lumbricals
-flexor carpi radialis
-flexor digitorum profundus
-flexor pollicus longus
- abductor pollicus brevis
-flexor pollicus brevis - 4Compression sites (Pronator teres syndrome)-1. at ligament of struthers: nerve passes through fibro-osseus tunnel formed by ligament
- pain w/ resisted forearm pronation
2. under thickened biciptial aponeurosis
- pain w/ resisted elbow flexion
3. Pronator teres: nerve passes btwn 2 heads compression can occur
- pain w/ resisted forearm pronation & flexion - 5Compression sites (anterior interosseus syndrome)1. under fibrous arch of superficial flexors in fingers
- pain w/ resisted flexion of 3rd finger
- weakness w/ flexion of thumb, index and middle fingers. - 6Compression sites (carpal tunnel syndrome)-compression under carpal tunnel(formed by flexor retinaculum & carpal bones)
- tendons of flexor digitorum superficialis & profundus, and flexor pollicus longus also pass through here along with the median nerve - 7Causes for carpal tunnel-osteophyte formation & calluses from fractures
- tenosynovitis of wrist flexors
-scar tissue/fibrosis d/t trauma or repetitive strain disorders
- arthritis
-poor sleeping posture
-edematous conditions(prego, Bc pills, kidney disease, heart failure) - 8S/S of carpal tunnel1. numbness/parasthesia in first 3 1/2 digits
2. pain/burning
3. vary throughout day or with prolonged use of hand
4. clumsiness & weakness in hand
5. wasting of thenar eminence & first 2 lumbricals - 9AssessmentTest with ULTT 1 or 2
Informações
- Descrição
- college Ortho (Upper limb nerves) FlashCards sobre Median nerve, criado por Keisha Whisken em 01-10-2015.
- Criado por
- Keisha Whisken
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