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?

During a complicated vaginal delivery involving shoulder dys…

During a complicated vaginal delivery involving shoulder dystocia, the baby is born with Erb-Duchenne paralysis (Erb’s Palsy). On physical examination, the baby’s humerus is internally rotated. Which one of the following muscle pairs has lost innervation in this condition?