Glossary of scientific terms

Tactile: Relating to touch.

Tardive dyskinesia: Involuntary movements of the mouth, tongue, and lips can occur and may be associated with choreo-atheroid (purposeless, quick jerky movements that occur suddenly) movements of the trunk and limbs. Some medications prescribed for autism contribute to the development of this condition.

Therapist: A trained professional who works to overcome the effects of developmental problems.

Tuberous sclerosis: An inherited genetic disorder that produces growths in the brain and peripheral nervous system and special skin blemishes.

Vestibular: Pertaining to the sensory system located in the inner ear that allows that body maintain balance and enjoyably participate in movement such as swinging and rough and tumble.

Visual motor: The skill required to carry out a task such as putting a puzzle piece into a puzzle or a key into a keyhole.

Vocational training: Training for a job. Learning skills to perform in the workplace.

William syndrome: A syndrome of infantile hyper-calcaemia (elevated blood-calcium levels), heart abnormalities, and a characteristic facial appearance. As yet, the cause of the syndrome is unknown.