Mental confusion
Encyclopedia
Confusion of a pathological degree usually refers to loss of orientation
Orientation (mental)
Orientation is a function of the mind involving awareness of three dimensions: time, place and person. Problems with orientation lead to disorientation, and can be due to various conditions, from delirium to intoxication...

 (ability to place oneself correctly in the world by time, location, and/or personal identity) sometimes accompanied by disordered consciousness
Consciousness
Consciousness is a term that refers to the relationship between the mind and the world with which it interacts. It has been defined as: subjectivity, awareness, the ability to experience or to feel, wakefulness, having a sense of selfhood, and the executive control system of the mind...

 and often memory
Memory
In psychology, memory is an organism's ability to store, retain, and recall information and experiences. Traditional studies of memory began in the fields of philosophy, including techniques of artificially enhancing memory....

 (ability to correctly recall previous events or learn new material). Confusion as such is not synonymous with inability to focus attention
Attention
Attention is the cognitive process of paying attention to one aspect of the environment while ignoring others. Attention is one of the most intensely studied topics within psychology and cognitive neuroscience....

, although severe inability to focus attention can cause, or greatly contribute to, confusion. Together, confusion and inability to focus attention (both of which affect judgment) are the twin symptoms of a loss or lack of normal brain function (mentation). The milder degrees of confusion as pathological symptoms are relative to previous function. Thus (for example) a mathematician confused about manipulation of simple fraction
Fraction
In common usage a fraction is any part of a unit.Fraction may also mean:*Fraction , one of more equal parts of something, eg...

s may be showing pathology
Pathology
Pathology is the precise study and diagnosis of disease. The word pathology is from Ancient Greek , pathos, "feeling, suffering"; and , -logia, "the study of". Pathologization, to pathologize, refers to the process of defining a condition or behavior as pathological, e.g. pathological gambling....

 which would not be diagnosable in a person without training in this area. Thus, as with the case of delirium, the minor degrees of pathological confusion cannot be diagnosed without knowledge of a person's "baseline", or normal, level of mental functioning.

Confusion may result from a relatively sudden brain dysfunction. Acute confusion is often called delirium
Delirium
Delirium or acute confusional state is a common and severe neuropsychiatric syndrome with core features of acute onset and fluctuating course, attentional deficits and generalized severe disorganization of behavior...

 (also called acute confusional state), although delirium also includes a broader array of disorders than confusion, e.g. inability to focus attention and various impairments in awareness and temporal and spatial orientation.

Confusion may also result from chronic organic brain pathologies such as dementia
Dementia
Dementia is a serious loss of cognitive ability in a previously unimpaired person, beyond what might be expected from normal aging...

. In either case, confusion is usually associated with some degree of loss of ability to focus attention, but (as noted) the association is not invariable, especially for lesser degrees of impairment.

Many health problems may cause the syndromes of delirium
Delirium
Delirium or acute confusional state is a common and severe neuropsychiatric syndrome with core features of acute onset and fluctuating course, attentional deficits and generalized severe disorganization of behavior...

 or dementia
Dementia
Dementia is a serious loss of cognitive ability in a previously unimpaired person, beyond what might be expected from normal aging...

. These syndromes may also occur together, and both of them usually include the symptom of confusion. Since mental function is extremely sensitive to health, the appearance of either a new confused state, or a new loss of ability to focus attention (delirium), may indicate that a new physical or mental illness
Illness
Illness is a state of poor health. Illness is sometimes considered another word for disease. Others maintain that fine distinctions exist...

 has appeared, or that a chronic physical or mental illness has progressed (become more severe).

Signs and symptoms

Confusion is a symptom, and it may range from mild to severe. The confused state may include jumbled or disorganized thought
Thought
"Thought" generally refers to any mental or intellectual activity involving an individual's subjective consciousness. It can refer either to the act of thinking or the resulting ideas or arrangements of ideas. Similar concepts include cognition, sentience, consciousness, and imagination...

 and unusual, bizarre, or aggressive
Aggressive
“Aggressive” is a New York-based Grammy award-winning music video and commercial directing team of Alex Topaller and Daniel Shapiro.Aggressive has been described by Movie Creation Mag as “having a fascination with the wonderful, in the likes of the surrealist Rafal Olbinski” and “tenacious about...

 behavior
Behavior
Behavior or behaviour refers to the actions and mannerisms made by organisms, systems, or artificial entities in conjunction with its environment, which includes the other systems or organisms around as well as the physical environment...

s. A person who is confused may have difficulty solving problems or tasks, especially those known to have been previously easy for the person and an inability to recognize family members or familiar objects, or to give approximate location of family members not present. As well, they may appear to be disoriented, drowsy, hyperactive, or anxious. In severe cases, the person may have hallucination
Hallucination
A hallucination, in the broadest sense of the word, is a perception in the absence of a stimulus. In a stricter sense, hallucinations are defined as perceptions in a conscious and awake state in the absence of external stimuli which have qualities of real perception, in that they are vivid,...

s, feelings of paranoia
Paranoia
Paranoia [] is a thought process believed to be heavily influenced by anxiety or fear, often to the point of irrationality and delusion. Paranoid thinking typically includes persecutory beliefs, or beliefs of conspiracy concerning a perceived threat towards oneself...

, and a state of delirium
Delirium
Delirium or acute confusional state is a common and severe neuropsychiatric syndrome with core features of acute onset and fluctuating course, attentional deficits and generalized severe disorganization of behavior...

.

Differential diagnosis

The most common causes of drug induced acute confusion are dopaminergic
Dopaminergic
Dopaminergic means related to the neurotransmitter dopamine. For example, certain proteins such as the dopamine transporter , vesicular monoamine transporter 2 , and dopamine receptors can be classified as dopaminergic, and neurons which synthesize or contain dopamine and synapses with dopamine...

 drugs used for Parkinson's disease
Parkinson's disease
Parkinson's disease is a degenerative disorder of the central nervous system...

, diuretics, tricyclic or tetracyclic antidepressants and benzodiazepines. The elderly and especially those with pre-existing dementia are at most risk for drug induced acute confusional states.

New research is finding a link between Vitamin D
Vitamin D
Vitamin D is a group of fat-soluble secosteroids. In humans, vitamin D is unique both because it functions as a prohormone and because the body can synthesize it when sun exposure is adequate ....

 deficiencies and cognitive impairment which includes memory loss
Memory loss
Memory loss can be partial or total and it is normal when it comes with aging. Sudden memory loss is usually a result of brain trauma and it may be permanent or temporary. When it is caused by medical conditions such as Alzheimers, the memory loss is gradual and tends to be permanent.Brain trauma...

and a foggy brain.

External links

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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