What causes alexia?

Alexia is a rare condition in which reading comprehension is nonexistent or significantly limited due to brain injury, damage, or trauma. It can be associated with other forms of neurological deficits and is often associated with agraphia, the inability to write.

How is alexia caused?

Pure alexia is usually caused by an occlusion of distal (posterior) branches of the left posterior cerebral artery. The resultant damage is believed to interrupt the transfer of neural information from the visual cortex to the language cortex.

What is alexia disorder?

Alexia means the inability to comprehend written material. The patients' ability to write and spell is intact, but they are unable to spontaneously read, even what they have written seconds ago. Other features of language, such as speech comprehension, are usually intact.

What causes alexia with agraphia?

Cortical cognitive deficits, including alexia with agraphia, may occur as the result of thalamic lesions. The probable mechanism is a diaschisis phenomenon involving thalamic tract disconnections. Key words: agraphia with alexia, thalamic lesion, diaschisis phenomenon, tract disconnection.

What causes Alexia without agraphia?

Most cases of alexia without agraphia are caused by left posterior cerebral artery (PCA) occlusion and a resultant infarct of the left visual cortex as well as the splenium of the corpus callosum, which is the case here.

Alexia without agraphia

Is alexia and dyslexia the same?

Alexia, or acquired dyslexia, refers to a deficit in reading following damage to the brain in previously literate individuals. Alexia is different from developmental dyslexia, which is a developmental deficit in learning to read.

Can you have alexia without aphasia?

Alexia without Agraphia (Pure Alexia)

Alexia without agraphia is not an aphasic disorder as such, inasmuch as speech output and aural comprehension are intact. The condition is associated with a remarkably consistent anatomical localization (A. Damasio & Damasio, 1983).

What causes agraphia?

Causes. Agraphia has a multitude of causes ranging from strokes, lesions, traumatic brain injury, and dementia. Twelve regions of the brain are associated with handwriting.

How common is alexia?

Alexia is a rare condition in which reading comprehension is nonexistent or significantly limited due to brain injury, damage, or trauma.

What causes Ideomotor apraxia?

Cause. The most common cause of ideomotor apraxia is a unilateral ischemic lesion to the brain, which is damage to one hemisphere of the brain due to a disruption of the blood supply, as in a stroke. There are a variety of brain areas where lesions have been correlated to ideomotor apraxia.

What is acquired Alexia?

The acquired alexia with agraphia syndrome is a conspicuous disorder of reading and writing in the absence of significant other language impairments that has mainly been recorded in adults. Pure cases are rare, with most patients displaying mild aphasic deficits.

What causes locked in syndrome?

Locked-in syndrome is caused by damaged to the pons, a part of the brainstem that contains nerve fibers that relay information to other areas of the brain. The first description of the locked-in syndrome can be found in The Count of Monte Cristo authored by Alexandre Dumas.

What part of the brain causes apraxia?

Apraxia results from dysfunction of the cerebral hemispheres of the brain, especially the parietal lobe, and can arise from many diseases or damage to the brain. There are several kinds of apraxia, which may occur alone or together.

Can you recover from alexia?

Survivors may experience pure alexia after brain injury, which involves difficulty with reading. This usually occurs when a brain injury affects the posterior left hemisphere of the brain. While learning to read again after brain injury can be challenging, it is possible to improve pure alexia.

What causes akinetic mutism?

Akinetic mutism is often the result of severe frontal lobe injury in which the pattern of inhibitory control is one of increasing passivity and gradually decreasing speech and motion.

What causes word blindness?

Word blindness is a complex visual disturbance resulting from disease in the visual-association areas at the back of the brain. Someone who has had a stroke may be left with pure (total) or partial word blindness.

What part of the brain does alexia affect?

Patients with pure alexia lose the ability to read fluently following injury to areas in the rear part of the left hemisphere of their brain. The curious thing is that they can still walk, talk, think, and even write like they did before their injury. They just can't read. Not even what they have written themselves.

What part of brain is affected in agraphia?

Sometimes called “pure” agraphia, apraxic agraphia is the loss of writing ability when you can still read and speak. This disorder sometimes happens when there's a lesion or hemorrhage in the frontal lobe, parietal lobe, or temporal lobe of the brain or in the thalamus.

Why do I keep saying the wrong words?

Aphasia is a communication disorder that makes it hard to use words. It can affect your speech, writing, and ability to understand language. Aphasia results from damage or injury to language parts of the brain. It's more common in older adults, particularly those who have had a stroke.

What is the difference between dysgraphia and agraphia?

Dysgraphia sometimes termed agraphia is a specific deficiency in the ability to write not associated with ability to read, or due to intellectual impairment.

What is posterior alexia?

Posterior or pure alexia is an uncommon acquired reading disturbance in which the loss of the ability to read is not associated with other language deficits.

What is Gerstmann syndrome?

Gerstmann syndrome is a neuropsychological disorder characterized by the tetrad of agraphia (inability to write), acalculia (inability to perform mathematical calculations), finger agnosia (inability to name, discriminate, or identify fingers), and left-right disorientation (inability to distinguish left from right).

What is Wernicke aphasia?

Wernicke aphasia is characterized by impaired language comprehension. Despite this impaired comprehension, speech may have a normal rate, rhythm, and grammar. The most common cause of Wernicke's aphasia is an ischemic stroke affecting the posterior temporal lobe of the dominant hemisphere.

How is alexia treated?

What are the four types of dyslexia?

The 4 types of dyslexia include phonological dyslexia, surface dyslexia, rapid naming deficit, and double deficit dyslexia. Dyslexia is a learning disorder where the person often has difficulty reading and interpreting what they read.