What are the affected muscles in BPI?
C5, C6 nerve injuries affect shoulder and biceps muscles, C7 affects wrist muscles and C8, T1 nerves affect forearm flexors and intrinsic hand muscles
What other methods of trauma other than MVA can lead to BPI?
2nd most common is traumatic birth injury which may lead to injury of upper trunk and Erb's paralysis
There are avulsions of the left C7 and C8 root sleeves, a tear in the dural sac with left C6-7 and C7-T1 pseudomeningocele formation. The adjacent muscles are intact with no signs of atrophy or edema.
Diagnosis: Traumatic avulsion of left C7 and C8 root sleeves with meningocele formation (M type)