Tinnitus activity in the limbic system and autonomic nervous system, thus increasing tinnitus awareness and annoyance. There are two types of tinnitus: "subjective tinnitus" and "objective tinnitus". Tinnitus is usually subjective, meaning that there is no sound detectable by other means. Subjective tinnitus has also been called "tinnitus aurium", "non-auditory" or "non-vibratory" tinnitus. In very rare cases tinnitus can be heard by someone else using a stethoscope, and in less rare – but still uncommon – cases it can be measured as a spontaneous otoacoustic emission (SOAE) in the ear canal. In such cases it is objective tinnitus, also called "pseudo-tinnitus"
Body part as an object aphasics have been put forward since then, including intellectual degradation, and the inability to carry out pretended actions. Denny-Brown takes a more holistic approach and suggested ideational apraxia results from diffuse brain damage. Body part as object is a relatively new concept in scientific literature. Past studies have suggested that BPO pantomimes may allow aphasics to avoid an impaired cognitive function. By not having to reproduce a movement outside of the usual context, they can have a more vivid experience of acting on an object. What is known as BPO pantomiming in children was first discussed in Goodglass and Kaplan’s