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11 Cards in this Set
- Front
- Back
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Axillary nerve injury
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Could be caused by fracture of surgical neck of humerus or shoulder dislocation
Paralysis of deltoid muscle --> abduction to horizontal is compromised Teres minor --> lateral rotation is weak Sensory loss on lateral side of arm |
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Long thoracic nerve injury
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Cause: stab wound or mastectomy
Paralysis of serratus anterior --> abduction past horizontal is compromised Arm cannot push -> winged scapula |
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Radial nerve injury
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Cause: fracture of humerus at midshaft
Result: Extensors of forearm --> extension of wrist and digits compromised, as is supination Sensory loss on post arm, post forearm, lateral aspect of dorsum of hand WRISTM DROP (hand flexed at wrist) |
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Median nerve injury at elbow or axilla
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Cause: supracondylar fracture of humerus
Result: paralysis of muscles in flexor component of arm --> flexion of wrist and digits is weakened, pronation is lost Sensory loss: palmar and dorsal aspects of index, middle, and half of ring, and palmar aspect of thumb Flattening of thenar eminence - ape hand |
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Median nerve injury at wrist
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Cause: slashing of wrist, carpal tunnel syndrome
Result: no paralysis of muscles. Thumb movement is lost. Sensory loss on palmar and dorsal aspects of index, middle, half of ring and palmar aspect of thumb Ape hand |
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Upper trunk injury
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Cause: violent stretch btw head and shoulder
Result: arm is medially rotated and pronated (Waiter's tip) |
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Lower trunk injury
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Cause: sudden pull upward on arm
Result: Loss of function of hand and wrist |
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Ulnar nerve injury at elbow or axilla
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Cause: fracture of medial epicondyle of humerus
Result: Paralysis of flexor carpi ulnaris --> deviation of hand to radial side at wrist Loss of flexion of ring and little fingers at DIP Flexion of ring and little fingers at MCP is lost Adduction of thumb lost Abduction, flexion, opposition of little finger lost Sensory: palmar and dorsal aspects of little finger, half of ring Clawhand |
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Ulnar injury at wrist
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Cause: slashing at wrist.
More severe clawhand. Function of flexor carpi ulnaris and flexor digitorum profundus are preserved. Hand muscles in ring and little finger lost |
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Anterior dislocation of humerus may result in damage of what nerve?
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Axillary
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Carpal tunnel syndrome
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Compressionn of median nerve
Flexion, abduction of thumb weakened Thumb opposition lost Extension of index and middle fingers lost. Sensory loss palmar and dorsal aspects of index, middle, and half of ring fingers and palmar aspect of thumb Sensation on radial side of palm is preserved because superficial branch of median nerve is not involved. |
