Directional enhancement feature for articulation catheter

A method of deflecting at least a portion of a medical device, the method comprising:

• arranging an elongate body at a target location, the elongate body having a proximal portion, a distal portion, and three mutually perpendicular planes, the elongate body being aligned with a first plane of the three mutually perpendicular planes, a first lumen aligned with the first plane and extending through the elongate body, a first steering line and a second steering line arranged on opposite sides of the first lumen relative to a second plane of the three mutually perpendicular planes and extending along the first plane of the three mutually perpendicular planes, and a first stiffening material and a second stiffening material spaced on opposite sides of the first lumen relative to a third plane of the three mutually perpendicular planes and extending along the first plane of the three mutually perpendicular planes;
• and
• deflecting at least the distal portion of the elongate body using the first steering line and the second steering line while biasing at least the distal portion of the elongate body to substantially align with the deflection by the first stiffening material and the second stiffening material.