PSYCH211 Lecture Notes - Lecture 5: Phrase (Music), Visual Cortex, International Union Of Crystallography

• School: University of Waterloo
• Department: Psychology
• Course: PSYCH211
• Professor: Kathleen Bloom

Document Summary

During prenatal period head, chest, and trunk grow first then arms and legs, and finally hands. Head develops faster than lower body - growth proceeds from centre of. [at birth] head = 1/4 of body. In infancy girls are slightly shorter and lighter than boys, with a higher ratio of fat to muscle. Children of the same age differ in rate of physical growth. Skeletal age: measure of development of the bones of the body (best estimate of child"s physical maturity) Embryonic skeleton formed out of -> cartilage -> at 6th week of pregnancy cartilage starts to harden into bone. Children"s head size is routinely measured from birth to 2 years old -> skull growth is extremely rapid during this period. Fontanels: soft spots or six gaps that separate the bones of the skull: anterior fontanels = largest gap, sutures (seams) allow skull to expand as brain grows, disappear completely in adolescence when skull growth is complete.