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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).
Often however, a spectrum of DDM is defined encompassing apathy, abulia, and akinetic mutism, with apathy being the mildest form and akinetic mutism being the most severe or extreme form. [1] [2] [3] Akinetic mutism involves alertness but absence of movement and speech due to profound lack of will.
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 .
Patients with depression can experience apathy, slurring of speech, and body movements similar to akinetic mutism. Similarly to akinetic mutism, patients with locked-in syndrome experience paralysis and can only communicate with their eyes. [3] Correct diagnosis is important to ensure proper treatment.
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.
Suppression of an eye is a subconscious adaptation by a person's brain to eliminate the symptoms of disorders of binocular vision such as strabismus, convergence insufficiency and aniseikonia. The brain can eliminate double vision by ignoring all or part of the image of one of the eyes.
Ocular neuropathic pain, also called corneal neuralgia, is a spectrum of disorders of ocular pain which are caused by damage or disease affecting the nerves.Ocular neuropathic pain is frequently associated with damaged or dysfunctional corneal nerves, [1] but the condition can also be caused by peripheral or centralized sensitization. [2]
Reduced affect display, sometimes referred to as emotional blunting or emotional numbing, is a condition of reduced emotional reactivity in an individual. It manifests as a failure to express feelings either verbally or nonverbally, especially when talking about issues that would normally be expected to engage emotions.