Tinnitus hum, but it can also arise as a subjective phenomenon from an increased awareness of blood flow in the ear. Rarely, pulsatile tinnitus may be a symptom of potentially life-threatening conditions such as carotid artery aneurysm or carotid artery dissection. Pulsatile tinnitus may also indicate vasculitis, or more specifically, giant cell arteritis. Pulsatile tinnitus may also be an indication of idiopathic intracranial hypertension. Pulsatile tinnitus can be a symptom of intracranial vascular abnormalities and should be evaluated for "irregular noises of blood flow" (bruits). The mechanisms of subjective tinnitus are often obscure. While it is not surprising that direct trauma
Body part as an object group with average 7.2 years of formal education) make significantly more BPO errors than the average adult population. It has been found that BPO errors (i.e. use of BPO pantomimes in place of the IO pantomimes dominant in typical adult individuals) are made by patients with schizophrenia. Given that BPO errors are associated with apraxia, and that past research has indicated that schizophrenic patients have apraxia-like symptoms, this is perhaps not a surprising finding. This BPO-schizophrenia association has not been extensively explored to date, and more research is required in order to better understand it. Body part as an object