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Apathy, also referred to as indifference, is a lack of feeling, emotion, interest, or concern about something. It is a state of indifference, or the suppression of emotions such as concern , excitement , motivation , or passion .
Less extreme forms of DDM, for instance apathy or anhedonia, can be a symptom of psychiatric disorders and related conditions, like depression, schizophrenia, or drug withdrawal. [ 4 ] [ 3 ] [ 1 ] [ 5 ] More extreme forms of DDM, for instance severe apathy, abulia, or akinetic mutism, can be a result of traumatic brain injury (TBI), stroke , or ...
Ataxia telangiectasia (Louis–Bar syndrome) Encephalotrigeminal angiomatosis (Sturge–Weber syndrome) (encephalofacial cavernous hemangiomatosis) Neurofibromatosis (von Recklinghausen's disease) Tuberous sclerosis (Bourneville's syndrome) Wyburn–Mason syndrome (racemose hemangiomatosis)
Akinetic mutism is a symptom during the final stages of Creutzfeldt–Jakob disease (a rare degenerative brain disease) and can help diagnose patients with this disease. [ 2 ] [ 9 ] It can also occur in a stroke that affects both anterior cerebral artery territories.
Ocular dominance, sometimes called eye preference or eyedness, [1] is the tendency to prefer visual input from one eye to the other. [2] It is somewhat analogous to the laterality of right- or left-handedness; however, the side of the dominant eye and the dominant hand do not always match. [3]
Amotivational syndrome is a chronic psychiatric disorder characterized by signs that are linked to cognitive and emotional states such as detachment, blunted emotion and drives, executive functions like memory and attention, [1] disinterest, passivity, apathy, and a general lack of motivation.
Neuro-ophthalmologic examination showing ophthalmoplegia affecting the left eye in a patient with Tolosa–Hunt syndrome.The central image represents forward gaze, and each image around it represents gaze in that direction (for example, in the upper left image, the patient looks up and right; the left eye is unable to accomplish this movement).
Heterophoria occurs only during dissociation of the left eye and right eye, when fusion of the eyes is absent. If you cover one eye (e.g., with your hand) you remove the sensory information about the eye's position in the orbit. Without this, there is no stimulus to binocular fusion, and the eye will move to a position of "rest".