A patient presents to the emergency department with a stroke.

The patient appears to be having difficulty with hearing and emotional behavior.

The nurse would suspect that which lobe of the brain was affected by the stroke?

Choice A rationale

Pericarditis is the inflammation of the pericardium, which is the thin, double-walled sac that surrounds and protects the outer surface of the heart. While it causes chest pain and can lead to pericardial effusion, it does not involve the innermost lining or the heart valves. The pericardium provides lubrication and prevents over-expansion of the heart. Inflammation here is external to the myocardium and endocardium, and thus does not fit the definition of an internal lining infection.

Choice B rationale

Myocarditis is the inflammation of the myocardium, which is the middle muscular layer of the heart wall responsible for the pumping action. This condition can weaken the heart muscle, leading to heart failure or arrhythmias. While it is a serious inflammatory process of the heart, it specifically targets the muscle tissue rather than the endocardial surface or the valvular structures. It is often caused by viral infections and affects the heart's overall contractility and structural integrity.

Choice C rationale

Thrombophlebitis is an inflammatory process that causes a blood clot to form and block one or more veins, usually in the legs. It is a vascular condition rather than a cardiac one. It involves the venous walls and the formation of a thrombus, which can lead to complications like pulmonary embolism if the clot dislodges. This condition has no direct anatomical relation to the internal chambers, valves, or the endocardial lining of the heart itself.

Choice D rationale

Endocarditis is the inflammation or infection of the endocardium, which is the innermost layer of the heart's chambers and also covers the heart valves. It most commonly occurs when bacteria or other germs from another part of the body spread through the bloodstream and attach to damaged areas in the heart. This can lead to the formation of vegetations on the valves, potentially causing valvular insufficiency, heart failure, or systemic emboli if the vegetations break loose.

Choice A rationale

Diverticulitis involves the inflammation or infection of small pouches called diverticula that form in the colon wall. Common clinical manifestations include acute left lower quadrant pain, fever, and leukocytosis. While bowel habits may change, the classic presentation is localized pain and infection rather than a long-term, cyclic pattern of alternating diarrhea and constipation. It requires antibiotics and often a temporary low-fiber diet during acute flare-ups to allow the bowel to rest.

Choice B rationale

Irritable bowel syndrome is a functional gastrointestinal disorder characterized by abdominal pain and altered bowel habits. The hallmark sign is the chronic fluctuation between diarrhea and constipation, often referred to as IBS-M. It does not cause structural damage or inflammation like inflammatory bowel disease. Pathophysiology involves visceral hypersensitivity and abnormal gut motility. Symptoms are often triggered by stress or specific foods, and diagnosis is frequently based on the Rome criteria for functional gut disorders.

Choice C rationale

Crohn's disease is an inflammatory bowel disease that can affect any part of the gastrointestinal tract from the mouth to the anus. It typically involves transmural inflammation and skip lesions. While it causes diarrhea and abdominal pain, it is less commonly associated with the specific rhythmic alternation of constipation seen in functional disorders. Complications include fistulas, strictures, and malabsorption. It is an autoimmune condition that requires immunosuppressants or biologics rather than being a primary motility issue.

Choice D rationale

Ulcerative colitis primarily affects the mucosal layer of the colon and rectum in a continuous fashion. The most prominent symptom is bloody diarrhea with mucus and urgent tenesmus. Patients may experience up to 20 stools per day during severe exacerbations. While constipation can occur in proctitis, the hallmark of the disease is inflammatory diarrhea. It is not defined by the functional alternating pattern characteristic of irritable bowel syndrome and usually presents with systemic signs of inflammation.