Elbow flexion plays a key role in the overall function of the upper ex
tremity. In the case of unilateral complete brachial plexus lesion, re
storation of elbow flexion will dramatically increase the patient's ch
ances of regaining bimanual prehension. Furthermore, depending on the
type of reconstruction, stability of the glenohumeral joint as well as
some supination function of the forearm can be restored to a varying
degree at the same time. Depending on the level of brachial plexus les
ion and/or reinnervation, different reconstructive procedures are avai
lable. In order to select the best treatment option for the patient it
is necessary to known the extent of the lesion of the brachial plexus
and/or ventral upper arm muscles, to time the operation appropriately
, to be aware of all treatment possibilities and to recall the special
problems of tendon transfer for brachial plexus patients. Our concept
is based on our experience with more than 1100 patients presenting a
brachial plexus lesion between 1981 and 1996 and treated in our instit
ution. There were 528 operative revisions of the brachial plexus. Some
225 patients underwent secondary muscle/tendon transfers. In 35 patie
nts elbow flexion was reconstructed by bipolar latissimus dorsi transf
er (n = 10), triceps-to-biceps transfer (n = 15), modified flexor/pron
ator muscle mass proximalization (n = 6) and multiple-stage free funct
ional muscle transfer after intercostal nerve transfer (n = 4).