What does dehescient high riding jugular bulb mean?

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Gender: Male
Age: 42

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On Sept 15 2010, I received a head injury ar work causing me to feel dizzy, unstable legs, disorientation, short-term memory loss; Was seen at ER, CT scan showed no serious injury, and treated for mild concussion; relieved from work for 3 days with orders to rest; prescribed Hydrocodone and diazapram. On Sept 22, 2010, went back to hospital with feelings of continued dizziness, lack of sleep, falling down, and having to use a cane from assistance with standing and walking, having mild to sharp pains on head and face. I do have plates in my face: right eye socket, nose bridge connected to forehead, and right and left sinus areas with two wires on lower eye socket. Another CT scan was performed and again no major damage such as intercranial hemorrage. Basically, no acute intracranial abnormality. But I am curious about the "dehiscent high riding jugular bulb on the right."