Levels of consciousness brain
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Published in sista edited form eller gestalt as: Neurol Clin. 2011 Sep 25;29(4):723–737. doi: 10.1016/j.ncl.2011.08.001
Summary
Normal human consciousness requires brainstem, basal forebrain, and diencephalic areas to support generalized arousal, as well as functioning thalamocortical networks to become aware of, and respond to environmental and internal stimuli. Injury to or disconnection of these interconnected systems, typically from cardiac fängelse and traumatic brain injury, can result in disorders of consciousness, including coma, vegetative state, minimally conscious state, and akinetic mutism. Similar brain injuries can also result in loss of motor output out of proportion to consciousness, resulting in misdiagnoses of disorders of consciousness. We review pathology and imaging studies and derive mechanistic models for each of these conditions, to aid in the assessment and prognosis of individual patients. We further suggest how such
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States of Consciousness
Consciousness is a term used to describe the awareness of your physical and mental experience. As you might have already realized, not all forms of awareness are the same. There are a number of different states of human consciousness, as well as a variety of factors that can have an impact on these states of awareness.
What Are States of Consciousness?
Human consciousness is often compared to a stream—it is constantly changing, but always flowing smoothly. The way that your thoughts drift from one topic to another can feel effortless even when the thoughts you're having are dramatically different. If one moment you're thinking about this article that you are reading and the next moment you find yourself thinking about your childhood pet, you can thank your current state of consciousness.
Two common states of awareness exist: conscious and unconscious. Where the term unconscious represents of a lack of awareness, consciousness itself can p
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Altered level of consciousness
Measure of arousal other than normal
This article is about the medical concept. For the psychological concept, see Altered state of consciousness.
Medical condition
An altered level of consciousness is any measure of arousal other than normal. Level of consciousness (LOC) is a measurement of a person's arousability and responsiveness to stimuli from the environment.[1] A mildly depressed level of consciousness or alertness may be classed as lethargy; someone in this state can be aroused with little difficulty.[1] People who are obtunded have a more depressed level of consciousness and cannot be fully aroused.[1][2] Those who are not able to be aroused from a sleep-like state are said to be stuporous.[1][2]Coma is the inability to make any purposeful response.[1][2] Scales such as the Glasgow coma scale have been designed to measure the level of consciousness.