PSY210H5 Lecture Notes - Lecture 3: Basal Metabolic Rate, Peripheral Nervous System, Neural Tube
Document Summary
Growth, particularly neuronal development, is cephalocaudal (from head to foot) Neuronal development is also proximodistal (from close in to further out) in that gross muscle control develops before control of extremities. Growth is very rapid during the first year, gradual during the preschool and elementary- school years, and rapid again in early adolescence. Almost all muscle fibers present at birth. Fibers fuse, become longer and thicker, in childhood and this accelerated in adolescence (boys especially) Bones begin as cartridge, which then hardens from the center outward and turns to bone. Epiphyses (cartilage at ends) not turned to bone and are added to and turn to bone until end of growth a few years after puberty. Accumulates later in pregnancy and in the first year of life. Children get leaner, but acquire more fat as they approach puberty, and rapidly so in adolescence (girls especially) Secular growth trends refers to generational changes in the physical development.
