An implantable pulse generator includes one or more structural features for accommodating the shape of a portion of a patient's limb, such as the shape of the patient's calf. In one embodiment, an implantable pulse generator includes a first node interconnected to a second node by an elongated housing member, the elongated housing member including a convex surface substantially matching a curvature of the patient's limb, such as a portion of the patient's arm or leg. Alternatively, an articulating housing is associated with the implantable pulse generator for enabling a surgeon to bend the housing to substantially conform to the patient's limb, such as a portion of the patient's arm or leg.
