Review Question - QID 213605

A 62-year-old right-handed man presents to the emergency department after he collapsed in the office. On presentation, he is found to be alert but his speech is found to be incomprehensible. He does not seem to understand any questions and cannot follow directions. He does not appear to be bothered by these deficits and continues to say strings of nonsensical sounds. Based on clinical suspicion, a computed tomography scan is performed revealing an acute ischemic stroke. The patient is treated using tissue plasminogen activator and admitted for monitoring by neurology. Damage to which of the following structures is most likely responsible for these symptoms?