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lidiya [134]
4 years ago
9

Which type of nerve injury causes an inability to extend the thumb in a hitchhiker's sign?

Biology
1 answer:
Lena [83]4 years ago
7 0
The hitchhike sign represents the extension of the thumb and it is used to identify two different conditions: radial nerve or posterior interosseous nerve palsy and diastrophic dwarfism.
If there is radial nerve lesion then weakness of brachioradialis and finger flexion occurs. <span>If there is a posterior interosseous nerve lesion then weakness of finger extension occurs.</span>
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