A

Agent 

An entity that perceives and acts

Agnosia

Deficit in the ability to recognize a specific category such as animals or tools

Agrammatic aphasia

An inability to produce grammatical sentences, characterized by the lossof grammatical elements such as those indicating person or tense

Algorithm

A set of precise instructions for solving a problem or attaining a goal

Alzheimer’s Disease

A progressive degenerative disease in which brain cells are destroyed, leading to loss of memory, loss of other functions and ultimately death

Ambiguous sentence

A sentence whose words or structure offer more than one possible interpretation

American Sign Language ( ASL )

A linguistic system of hand signals and gestures, used by much of the deaf population of North America

Amnesia

Loss of memory

Analytical Engine

An early computer, invented by Charles Babbage, that was to be a general purpose programmable computing able to add, subtract, multiply and divide

Anatomy

The branch of biology dealing with the structure of the body

Angiography

A method of imaging the human brain by injecting a dye that is detectable by X-Ray

Animat

An artificial simulated or embodied animal

Aphasia

Partial or total loss of language caused by injury to certain areas of the brain