A patient in the clinic shows signs of meningitis (infection…

A patient in the clinic shows signs of meningitis (infection of the meninges). A spinal tap procedure is needed to obtain a sample of cerebrospinal fluid to confirm or reject the diagnosis of meningitis. Which one of the following structures will be penetrated by the spinal needle during the spinal tap procedure?

A patient suffers from hyperhidrosis (excessive sweating) on…

A patient suffers from hyperhidrosis (excessive sweating) on the palms of both hands. The sweating is profuse, and causes a great deal of discomfort and embarrassment. The patient above does not respond to pharmacological treatment for hyperhidrosis, and will undergo a sympathectomy procedure to stop the sweating on his palms. This procedure will involve which of the following interventions?