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Figure 4.66. Left radial nerve palsy in a neonate presents as a typical wrist-drop. The condition probably results from interference with blood supply to the nerve if there is abnormal compression or traction during a difficult labor. With the wrist-drop there is ability to grip with the fingers and voluntary extension of the fingers. A similar appearance may occur in an infant with a postural deformity, or a pseudo "wrist-drop" may be seen in a floppy, hypotonic infant hence it is important to check for voluntary wrist extension.

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