Updated: 10/13/2018

Posterior Interosseous Nerve

Topic
Review Topic
0
0
Questions
3
0
0
https://upload.orthobullets.com/topic/10104/images/pincoarse1500.jpg
https://upload.orthobullets.com/topic/10104/images/pin.jpg
https://upload.orthobullets.com/topic/10104/images/newpinsensory1500.jpg
https://upload.orthobullets.com/topic/10104/images/pincth.jpg
https://upload.orthobullets.com/topic/10104/images/pinsensory700.jpg
https://upload.orthobullets.com/topic/10104/images/ughsensory700.jpg
 Course
  • Origins
    • originates from the radial nerve at the radiohumeral joint line       
  • Course
    • arcade of Frosche at radial head
      • dives under supinator at arcade of Frohse (thickened edge of between heads of supinator)
    • forearm posterior compartment
      • winds around radial neck within substance of muscle to posterior compartment of forearm
    • interosseous membrane
      • reaches interosseous membrane of forearm and ends as sensation to dorsal wrist capsule
    • dorsal wrist capsule
Motor Innervation
  • Motor
    • common extensors
      •  ECRB (often from radial nerve proper, but can be from PIN) 
      •  Extensor digitorum communis (EDC) 
      •  Extensor digiti minimi (EDM) 
      •  Extensor carpi ulnaris (ECU) 
    • deep extensors
      •  Supinator 
      •  Abductor pollicis longus (APL) 
      •  Extensor pollicus brevis (EPB) 
      •  Extensor pollicus longus (EPL) 
      •  Extensor indicis proprius (EIP) 
Senory Innervation
  • Sensory
    • sensory fibers to dorsal wrist capusle
      • provided by terminal branch which is located on the floor of the 4th extensor compartment     
    • no cutaneous innervation
Clinical
  • PIN compression Syndrome 
    • in PIN palsy,  the last muscle to recover is the extensor indicis proprius 
  • Dorsal Approach to Radius (Thompson) 
 

Please rate topic.

Average 4.3 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 (3)
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
Question locked
Sorry, this question is for
PEAK Premium Subscribers only
Upgrade to PEAK
ARTICLES (1)
POSTS (1)
Topic COMMENTS (6)
Private Note