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Abstract
The anatomical sites of radial nerve compression were studied by
dissecting thirty upper limbs (from fifteen, human cadavers from the
Anatomy Department in Benha Faculty of Medicine). This study revealed
that the radial nerve and its terminal branches were crossed by many
elements which were categorized into four groups according to their sites
from above downwards:
The first and second groups include the elements crossing the
radial nerve in front of the lower part of the lateral intermuscular septum
and in the radial tunnel :
The nerve was crossed by branches from the radial collateral ”artery
in 13.33% of specimens and also crossed by a muscular vessels extending
between brachialis and brachioradialis in 3.33% of the specimens,
crossed by brachialis in 20% of the specimens, crossed by a group of
muscle bundles extending between brachialis and brachio-radialis in 20%
of the specimens, and also crossed by a fibrous band extending between
the previous two muscles in 23.33% of the specimens.
So, infront of the lateral intermuscular septum and in the radial
tunnel the radial nerve was crossed by vessels, muscle bundles and
fibrous bands in 80% of the studied specimens.
The third group include the elements crossing the superficial and
deep terminal branches of the radial nerve in the cubital fossa:
The two terminal branches of the radial nerve were crossed by
muscular branches from common interosseous artery in 3.33% of the
specimens, also, they were crossed by muscular branches from the
beginning of the radial artery in 3.33% of the specimens.
So, in the cubital fossa, the two terminal branches of the radial
nerve were crossed by arteries in 6.66% of the specimens.
In the Fourth group the deep terminal branch of the radial nerve
was crossed by the arcade of Frohse in 40% of specimens.
It was concluded that, in the course of the radial nerve in the lower
part of the arm and forearm, the most common site liable for compression
is the radial tunnel.