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Nerves Flashcards

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1
Q

Musculocutaneous

Part of what plexus?
Innervated by which never root(s)?
Origin trunk?
origin chord?
MM innervated by it?
Actions by those muscles?
Sensory innervations location?
Common injury site?
Common causes for injury?

A
  1. Brachial plexus
  2. C5 C6 C7
  3. Superior and middle trunk
  4. Lateral chord
  5. Coracobrachialis, Biceps Brachii, Brachioradialis
  6. GH flex, elbow flex + forearm supination
  7. Lateral forearm
  8. Anterior arm
  9. Nerve being pinched between the biceps and brachioradialis OR w/in coracobrachialis.
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2
Q

Axillary Nerve

Part of what plexus?
Innervated by which never root(s)?
Origin trunk?
origin chord?
MM innervated by it?
Actions by those muscles?
Sensory innervations location?
Common injury site?
Common causes for injury?

A
  1. Brachial plexus
  2. C5 C6
  3. Superior trunk
  4. Posterior chord
  5. Teres minor, lat deltoid, long head of triceps brachii
  6. GH ABD and Ext rot
  7. Lat deltoid
  8. axilla
  9. Poor use of crutches, inferior GH dislocation
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3
Q

Median Nerve

  1. Part of what plexus?
  2. Innervated by which never root(s)?
  3. Origin trunk?
  4. origin chord?
  5. MM innervated by it?
  6. Actions by those muscles?
  7. Sensory innervations location?
  8. Common injury site?
  9. Common causes for injury?
A
  1. Brachial plexus
  2. C5 C6, C7, C8 T1
  3. Superior, middle, and inferior trunks
  4. Lateral and middle chords
  5. Pronator teres, Flexor digitorum superficialis + profundus, Flexor carpi radialis, flexor pollicis longus, Abd pollicis brevis, pronator quadratus, opponens pollicis, lumbricals (1 +2).
  6. Forearm pronation, Wrist flexion, digit flexion, thumb flexion, thumb add.
  7. lateral Palmar and dorsal surface of hand + ant and posterior surface of first 3.5 digits. “german 3”
  8. Elbow (medial) + wrist (anterior)
  9. Elbow fracture, compression (carpal tunnel, pronator teres syndrome, ape hand deformity, oath hand deformity)
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4
Q

Radial Nerve

  1. Part of what plexus?
  2. Innervated by which never root(s)?
  3. Origin trunk?
  4. origin chord?
  5. MM innervated by it?
  6. Actions by those muscles?
  7. Sensory innervations location?
  8. Common injury site?
  9. Common causes for injury?
  10. Common Sign for radial neuropathy?
A
  1. Brachial Plexus
  2. C5 C6 C7 T1
  3. Superior, middle, and inferior trunks
  4. posterior cord
  5. Triceps, brachialis, anconeus, brachioradialis, ext carpi radialis brevis & longus, supinator, ext digitorum, ext carpi ulnaris, abd pollicis longus, ext pollicis longus and brevis.
  6. Motor innervation= all ext muscles of arm, forearm and digits + supination.
  7. Posterior forearm, dorsal side of hand.
  8. axilla & humerus.
  9. Arm over a chair, crutches, sleeping position.
  10. Wrist drop (wrist literally “drops” or “flexed” due to lose of mm contraction in ext mm).
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5
Q

Ulnar Nerve

  1. Part of what plexus?
  2. Innervated by which never root(s)?
  3. Origin trunk?
  4. origin chord?
  5. MM innervated by it?
  6. Actions by those muscles?
  7. Sensory innervations location?
  8. Common injury site?
  9. Common causes for injury?
  10. Common Sign for radial neuropathy?
A
  1. Brachial plexus
  2. C7, C8, T1
  3. ?
  4. Medial chord
  5. Flex carpi ulnaris, flex digitorum profundus, flex digiti minimi, aBD digiti minimi, opponens digiti minimi, add pollicis, lumbricals (3 +4) and interossei.
  6. Ulnar deviation, wrist flex, 5th digit flex + abd + opposition, thumb ADD.
  7. 5th digit plus ant and dorsal portion of lateral 3rd of hand.
  8. Medial hand and wrist
  9. Cycling, trauma to medial elbow or medial wrist.
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6
Q

Long Thoracic Nerve

  1. Part of what plexus?
  2. Innervated by which never root(s)?
  3. Origin branch?
  4. MM innervated by it?
  5. Actions by those muscles?
  6. Sensory innervations location?
  7. Common injury site?
  8. Common causes for injury?
  9. Common Sign for radial neuropathy?
A
  1. Brachial plexus
  2. C5 C6 C7
  3. C5 C6 C7
  4. serratus anterior
  5. Shoulder protraction + stabalizes the scapula
  6. none
  7. Lateral ribs
  8. Heavy backpack wearing, blow to the lateral ribs or surgery
  9. Common sign for a neuropathy= scapular winging + reduction in GH ABD (can only do 90-100 degrees of ABD).
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7
Q

Dorsal Scapular

  1. Part of what plexus?
  2. Innervated by which never root(s)?
  3. Origin trunk?
  4. origin branch?
  5. MM innervated by it?
  6. Actions by those muscles?
  7. Sensory innervations location?
  8. Common injury site?
  9. Common causes for injury?
  10. Common Sign for radial neuropathy?
A
  1. brachial plexus
  2. C5
  3. The superior trunk
  4. C5 nerve root
  5. Levator scap + rhomboids min
  6. scap elevation + shoulder retraction
  7. none
  8. The lateral neck
  9. Scalene compression, (specifically the middle scalene as this nerve passes through this mm)
  10. laterally displaced scapula, tenderness along lower scalenes, NTW along medial border of the scapula.
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8
Q

Suprascapular Nerve

  1. Part of what plexus?
  2. Innervated by which never root(s)?
  3. Origin trunk?
  4. origin branch?
  5. MM innervated by it?
  6. Actions by those muscles?
  7. Sensory innervations location?
  8. Common injury site?
  9. Common causes for injury?
  10. Common Sign for radial neuropathy?
A
  1. Brachial plexus
  2. Inervated by C5, C6
  3. Superior trunk
  4. none
  5. Supraspinatus and infraspinatus
  6. Shoulder abd and ext rotation
  7. none.
  8. Suprior sacpular notch
  9. repetitive overhead imingment syndrome
  10. Supra and infra mm atrophy, reduced from in and and lateral shoulder rotation.
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9
Q

Subclavius nerve

  1. Part of what plexus?
  2. Innervated by which never root(s)?
  3. Origin trunk?
  4. origin branch?
  5. MM innervated by it?
  6. Actions by those muscles?
  7. Sensory innervations location?
  8. Common injury site?
  9. Common causes for injury?
  10. Common Sign for radial neuropathy?
A
  1. brachial plexus
  2. C5 and C6
  3. superior trunk
  4. none
  5. subclavius
  6. clavicle depression
  7. none
  8. no common injury site
  9. no common injury etiology
  10. clavicle instability
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10
Q

Lateral pectoral nerve (anterior thoracic)

  1. Part of what plexus?
  2. Innervated by which never root(s)?
  3. Origin trunk?
  4. origin branch?
  5. MM innervated by it?
  6. Actions by those muscles?
  7. Sensory innervations location?
A
  1. brachial plexus
  2. C5 C6 C7
  3. superior and middle trunk
  4. lateral cord
  5. pec major
  6. shiulder adduction
  7. none
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11
Q

Medial pectoral nerve

  1. Part of what plexus?
  2. Innervated by which never root(s)?
  3. Origin trunk?
  4. origin branch?
  5. MM innervated by it?
  6. Actions by those muscles inervated by this nerve?
  7. Sensory innervations location?
A
  1. brachial plexus
  2. C8 T1
  3. posterior trunk
  4. medial cord
  5. pec major and pec minor
  6. shoulder protraction
  7. none
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12
Q

Medial brachial (arm) cutaneous nerve

  1. Part of what plexus?
  2. Innervated by which never root(s)?
  3. Origin trunk?
  4. origin branch?
  5. MM innervated by it?
  6. Actions by those muscles inervated by this nerve?
  7. Sensory innervations location?
A
  1. brachial plexus
  2. C8 T1
  3. inferior trunk
  4. medial cord
  5. none
  6. none
  7. medial surface of the skin on the arm.
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13
Q

Medial antebrachial (forearm) cutaneous nerve

  1. Part of what plexus?
  2. Innervated by which never root(s)?
  3. Origin trunk?
  4. origin branch?
  5. MM innervated by it?
  6. Actions by those muscles inervated by this nerve?
  7. Sensory innervations location?
A
  1. brachial plexus
  2. C8 T1
  3. inferior trunk
  4. medial cord
  5. none
  6. none
  7. medial forearm
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