. A practical treatise on fractures and dislocations. DISLOCATIONS OF THE KNEE. 793 In a few oases there is mention of a blow or fall received by themother while; carrying the child, but it cannot be maintained thai Bpcha cause is in any case clear. The facility vvilh which the displacement Fia. Congenital dislocation of the knee. in the unilateral cases could always be reduced, the normal shape ofthe bones, and the prompt establishment of the functions of the limbpoint toward an accidental mechanical cause; probably, in the move-ments of the foetus the leg; is extended and becomes engag
. A practical treatise on fractures and dislocations. DISLOCATIONS OF THE KNEE. 793 In a few oases there is mention of a blow or fall received by themother while; carrying the child, but it cannot be maintained thai Bpcha cause is in any case clear. The facility vvilh which the displacement Fia. Congenital dislocation of the knee. in the unilateral cases could always be reduced, the normal shape ofthe bones, and the prompt establishment of the functions of the limbpoint toward an accidental mechanical cause; probably, in the move-ments of the foetus the leg; is extended and becomes engaged in such aposition that it cannot be flexed, and then by the pressure of the wallof the uterus hyperextension is effected. Hyperextension in conse-quence of unopposed contraction of the quadriceps can hardly besupposed, for the flexors have not been found paralyzed. In Hamil-tons case of double backward dislocation the flexors were con-tracted, and their tendons had to be divided before the legs could bestraightened. In Friedlebens (bilateral) the articular surface of the tibia restedagainst the front of the lower end of the femur; the condyles of thefemur and the head of the tibia were normally developed, the patellanormally attached, the capsule loose and large. In Alberts, a new-born chil
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