Abstract: A horizontal directional drilling system. The system has a pilot drill and an exit side drill, with a drill string extending between them. A backreamer is positioned between the drills to enlarge a borehole. The pilot drill pulls and rotates the backreamer. The exit side drill adds segments to the product pipe and pushes the product pipe into the enlarged borehole. The exit side drill is equipped with a rotational disconnect. The disconnect is engaged to allow torque transfer between a motor and a spindle when adding segments to the product pipe. The disconnect is disengaged to prevent torque transfer between the motor and the spindle when pushing the product pipe into the enlarged borehole.

Abstract: The present invention is for methods for identifying a human having an increased risk for anxiety disorders. The method involves genotyping the human for a specific brain-derived neurotrophic factor (BDNF) single nucleotide polymorphism (SNP), and/or administering a fear conditioning procedure while measuring fear, and administering an extinction procedure while measuring fear. The method can also involve comparing/MRI images of the amygdala of the human acquired during conditioning and extinction and determining if the human is unresponsive to extinction therapy by noting heightened and non-declining activity in the amygdala during extinction.

Abstract: The present invention is for methods for identifying a human having an increased risk for anxiety disorders. The method involves genotyping the human for a specific brain-derived neurotrophic factor (BDNF) single nucleotide polymorphism (SNP), and/or administering a fear conditioning procedure while measuring fear, and administering an extinction procedure while measuring fear. The method can also involve comparing/MRI images of the amygdala of the human acquired during conditioning and extinction and determining if the human is unresponsive to extinction therapy by noting heightened and non-declining activity in the amygdala during extinction.