A surgical instrument comprising: an end effector to treat tissue, wherein the end effector comprises an ultrasonic blade ; an articulating shaft extending proximally from the end effector along a longitudinal axis, wherein the articulating shaft comprises: a proximal shaft member ; and a distal shaft member pivotably coupled to the proximal shaft member at an articulation joint ; an ultrasonic transducer assembly comprising an ultrasonic transducer acoustically coupled to the ultrasonic blade, wherein the ultrasonic transducer assembly is positioned distally from the articulation joint; a clamp arm pivotable about a clamp arm pivot point from an open position to a closed position substantially parallel to the ultrasonic blade; wherein the ultrasonic blade extends distally from the ultrasonic transducer, wherein the clamp arm defines a clamp portion extending distally from the clamp arm pivot point and a proximal portion extending proximally from the clamp arm pivot point, wherein the surgical instrument further comprises: a clamp arm control member extending through the shaft; a first linkage member defining a distal end pivotably coupled to a proximal portion of the ultrasonic transducer assembly ; a second linkage member defining a proximal end pivotably coupled to the clamp arm control member and a distal end pivotably coupled to the proximal portion of the clamp arm; wherein the proximal end of the first linkage member is pivotably coupled to the clamp arm control member. an end effector to treat tissue, wherein the end effector comprises an ultrasonic blade ; an articulating shaft extending proximally from the end effector along a longitudinal axis, wherein the articulating shaft comprises: a proximal shaft member ; and a distal shaft member pivotably coupled to the proximal shaft member at an articulation joint ; a proximal shaft member ; and a distal shaft member pivotably coupled to the proximal shaft member at an articulation joint ; an ultrasonic transducer assembly comprising an ultrasonic transducer acoustically coupled to the ultrasonic blade, wherein the ultrasonic transducer assembly is positioned distally from the articulation joint; a clamp arm pivotable about a clamp arm pivot point from an open position to a closed position substantially parallel to the ultrasonic blade; wherein the ultrasonic blade extends distally from the ultrasonic transducer, wherein the clamp arm defines a clamp portion extending distally from the clamp arm pivot point and a proximal portion extending proximally from the clamp arm pivot point, wherein the surgical instrument further comprises: a clamp arm control member extending through the shaft; a first linkage member defining a distal end pivotably coupled to a proximal portion of the ultrasonic transducer assembly ; a second linkage member defining a proximal end pivotably coupled to the clamp arm control member and a distal end pivotably coupled to the proximal portion of the clamp arm; wherein the proximal end of the first linkage member is pivotably coupled to the clamp arm control member. a clamp arm control member extending through the shaft; a first linkage member defining a distal end pivotably coupled to a proximal portion of the ultrasonic transducer assembly ; a second linkage member defining a proximal end pivotably coupled to the clamp arm control member and a distal end pivotably coupled to the proximal portion of the clamp arm; wherein the proximal end of the first linkage member is pivotably coupled to the clamp arm control member. <EOS>