Aphasia is a disorder stemming from damage to the language portion of the brain, usually the left side. Aphasia is a communication disorder that interferes with the ability to process, understand or speak language. There are varying degrees of Aphasia from mild to severe. Aphasia can also cause a difficulty in reading or writing. Aphasia can occur from strokes, head injuries and from brain tumors. It is more common in adults but can also affect children.
Some people with aphasia may understand communication from others while not being able to speak themselves. Others with aphasia may not be able to speak or listen to others effectively. Aphasia usually does not affect thinking skills, only those parts of the brain required for communication.