The amount of displacement depends upon the level of the fracture, and the extent to which the aponeurotic expansion of the triceps is torn.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition."
Alexander Miles Alexis Thomson
At times, however, especially when its aponeurotic expansion is diseased, the necrosis of the perforans spreads until the aponeurosis is eaten through and the phalangeal sheath penetrated.
"Diseases of the Horse's Foot"
Harry Caulton Reeks
E. The point where in this instance the fibres of the aponeurotic tendon of the external oblique muscle begin to separate and form the pillars of the external ring.
"Surgical Anatomy"
Joseph Maclise