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A 54-year-old man comes to the physician for a follow-up examination 10 days after undergoing a stereotactic brain operation to remove a small tumor. The operation was successful. During the procedure, he was under conscious sedation. The patient recalls that at one point during the operation he experienced a sudden, intense feeling of overwhelming fear. Which of the following areas of the brain was most likely stimulated at that time?

A couple presents to a clinic for workup of infertility after 5 years of unprotected intercourse. The wife denies any medical problems and notes regular menstrual cycles. The husband states that he has had chronic sinusitis and lower respiratory tract infections. Physical examination of the woman is unremarkable. Examination of the man is remarkable for dextrocardia. Further workup of the husband will most likely reveal

Which of the following nerves is not directly linked to the L2–L3 spinal level?

A 36-year-old man with profound intellectual disability is brought to the physician by staff at his facility

because of increasing abdominal girth during the past 2 weeks. He is unable to speak, and no medical

history is currently available. Physical examination shows a protuberant abdomen with a fluid wave and

shifting dullness. There are no signs of trauma to the area. Laboratory studies show no abnormalities. A CT

scan of the abdomen is shown. Fluid is present in which of the following areas as indicated by the arrow?