Physically active learning is considered to enhance learning and additionally addresses health goals like increasing activity levels and reducing obesity. However, physically active learning has rarely been applied to science and engineering learning, or utilized with younger learners (e.g under sevens). This article describes a physically active…

Examined were 55 children with adenosine deaminase enzyme deficiency and combined immunodeficiency disease, characterized by severe infections in early life. (CL)

Studied were three unrelated infants with distal renal tubular acidosis (a condition characterized by an inability to acidify the urine to minimal pH levels resulting in the loss of bicarbonates). (DB)

This is a review of the relationship of neurochemistry to behavior. Most of the common neurotransmitters and neuromodulators are introduced. Special emphasis is given to the involvement of neurochemistry in mental disorders. (BB)

DATA FROM RECENT COMPREHENSIVE STUDIES OF THE PATHOLOGY OF MENTAL RETARDATION ARE ASSEMBLED, INCLUDING MATERIAL ON ETIOLOGY, MORPHOLOGY, BIOCHEMISTRY, AND LABORATORY DIAGNOSIS. AREAS COVERED ARE (1) GENETIC CAUSES OF MENTAL RETARDATION, (2) DISORDERS OF GESTATION, (3) BIRTH INJURY, (4) GENERAL CONSIDERATIONS OF POSTNATAL CAUSES OF MENTAL…