A 32-year-old woman has weakness of both her hands after a fall down a flight of stairs

A 32-year-old woman has weakness of both her hands after a fall down a flight of stairs. An X-ray
was ordered. Which is the SINGLE lowest vertebrae that needs to be seen in the cervical X-ray to
help diagnose the injury?
A.
C4/C5
B.
C5/C6
C.
C6/C7
D.
C7/T1
E.
C8/T1
Hand weakness involves either median nerve which has contributions from roots C5-T1 or ulnar nerve
which originates from the C8-T1 nerve roots.
Remember, a C8 vertebrae does not exist and so the option for C8/T1 is clearly wrong.
There are seven cervical vertebrae (C1-C7) and a total of eight cervical nerves C1- C8. All cervical
nerves except C8 emerge above their corresponding vertebrae, while the C8 nerve emerges below the
C7 vertebra that is between C7 and T1 vertebrae.
When you request for a cervical X-ray, you would like the film to extend up to C7/T1 as so you would
be able to see the cervical vertebrae (C1-C7) and all the cervical nerves (C1-C8).