This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American In an article published here back in November ...

The cranial sinuses are eight cavities within the skull that supply vocal resonance. When they become inflamed, often accompanied by facial pain, fever, and nasal congestion, the condition is called ...

The venous sinus is a cavity formed between the endosteal and meningeal layers of the dura. The sinuses are connected by channels to large cortical veins and together make up the venous system that ...

Robert is a 39-year-old male who presented with a 5-day history of severe headaches treated initially with antibiotics for suspected sinusitis by his primary-care physician. Robert's headaches did not ...