The ulna is the inner and longer
bone of the forearm (lower-arm).
It articulates with the humerus and
radius (above) and the radius (below).
The location of the ulna is indicated
in the diagram opposite.
See the Revision page about Bones
of the Hand, Wrist and Lower-Arms for further information including
a larger fully labelled diagram. This may be particularly interesting study/revision material for students
following courses in Reflexology
because such courses generally require a good basic knowledge of the skeletal
structures of the hands and feet.