Updated: 10/21/2016

Median nerve

Topic
Review Topic
0
0
Questions
2
0
0
Evidence
1
0
0
Videos
1
Innervation
  • Motor
    • superficial volar forearm group                                                                                                                          
    •  Pronator teres 
      •  Flexor carpi radialis
      •  Palmaris longus
    • intermediate group
      •  Flexor digitorum superficialis
    • deep group
      •  Flexor digitorum profundus (lateral)
      •  Flexor pollicis longus
      •  Pronator quadratus
    • hand
      •  1st and 2nd lumbricals
      •  Opponens pollicis
      •  Abductor pollicis brevis
      •  Flexor pollicis brevis

Origin

  • Brachial plexus  
    • C5-T1 roots
      • medial and lateral cords
Course
  • Anterior compartment of arm
    • anterior compartment (anteromedial to humerus)
    • runs with brachial artery (lateral in upper arm / medial at elbow)
    • no branches in the arm
  • Forearm
    • enters the forearm between the pronator teres and biceps tendon
    • travels between flexor digitorum superficialis (FDS) and flexor digitorum profundus (FDP)
    • then emerges between the FDS and flexor pollicis longus (FPL)
  • Hand
    • the nerve then enters the hand via the carpal tunnel, along with the tendons of the FDS, FDP and FPL
  • Terminal branches
    • anterior interosseous branch (AIN)
      • innervates the deep volar compartment of forearm except the ulnar half of the FDP
    • palmar cutaneous branch 
      • supplies sensory innervation to lateral palm
    • recurrent branch (to thenar compartment)
    • digital cutaneous branches
      • supply the radial 3 1/2 digits (palmar)
      • can also supply the index, long, and ring fingers dorsally
Clinical Conditions
  •  Carpal Tunnel Syndrome
  •  AIN Neuropathy
  •  Pronator Syndrome
 

Please rate topic.

Average 3.6 of 7 Ratings

Thank you for rating! Please vote below and help us build the most advanced adaptive learning platform in medicine

The complexity of this topic is appropriate for?
How important is this topic for board examinations?
How important is this topic for clinical practice?
Questions (2)
Question locked
Sorry, this question is for
PEAK Premium Subscribers only
Upgrade to PEAK
Question locked
Sorry, this question is for
PEAK Premium Subscribers only
Upgrade to PEAK
ARTICLES (1)
VIDEOS (1)
Topic COMMENTS (4)
Private Note