An ultrasound exam will be performed on 8 healthy volunteers to view the peripheral nerves in the lower arm in three locations: the elbow area, the wrist area, and the midpoint of the arm between the elbow and the wrist. A set of 8 healthy patients will be given an ultrasound exam to view the peripheral nerves located in the lower leg by imaging three locations: the knee area, the ankle area, and the midpoint of the leg between the knee and the ankle. The appropriate nerves will be identified by ultrasound and images will be captured and recorded for further corroboration. The group of 16 subjects will allow for varied observations of anatomical positions of neural and vascular structures, while keeping the sample size fairly small. No injections will be made at any time during this study.