What is Adynamic aphasia?

Adynamic aphasia is a form of transcortical motor aphasia characterized by sparse but otherwise normal spontaneous speech that may improve when concepts are introduced by external stimuli.

What causes transcortical motor aphasia?

Causes of Transcortical Motor Aphasia Most types of aphasia occur after direct damage to either Broca’s or Wernicke’s area. However, transcortical motor aphasia occurs when a stroke or brain injury damages the nerve fibers that send information back and forth between these two areas.

What part of the brain is damaged in transcortical motor aphasia?

Transcortical motor aphasia (TMoA), also known as commissural dysphasia or white matter dysphasia, results from damage in the anterior superior frontal lobe of the language-dominant hemisphere. This damage is typically due to cerebrovascular accident (CVA).

Where is Transcortical aphasia?

The lesions that lead to transcortical motor aphasia are typically found on the mesial surface of the anterior left frontal lobe, near supplementary motor cortex, or along the lateral aspect of the left frontal lobe; in either case these lesions fall outside of what is traditionally thought of as Broca’s area.

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 the difference between aphasia and dysarthria?

Aphasia and dysarthria are both caused by trauma to the brain, like stroke, brain injury, or a tumor. Aphasia occurs when someone has difficulty comprehending speech, while dysarthria is characterized by difficulty controlling the muscles used for speech.

What is Broca area?

Broca area, also called convolution of Broca, region of the brain that contains neurons involved in speech function. The Broca area lies specifically in the third frontal convolution, just anterior to the face area of the motor cortex and just above the Sylvian fissure.