Aphasia is a language disorder that can affect a person's ability to communicate, verbally and in writing. It is caused by damage to the language centre of the brain, usually in the left hemisphere.

Aphasia can manifest in different ways, depending on the location and severity of the brain injury. It may affect a person's ability to find the right words, speak in coherent sentences or understand spoken or written language.

A variety of conditions, such as stroke, traumatic brain injury, brain tumour, infection, or degenerative neurological disorders such as dementia can cause aphasia. Speech therapy can help improve communication skills and compensate for the language difficulties caused by the condition. Other forms of therapy, such as occupational therapy, may also be helpful in improving overall quality of life.