PSYC 2500H Chapter Notes - Chapter 5-7: Palmar Grasp Reflex, Thyroid, Thyroid Hormones

• School: Trent University
• Department: Psychology
• Course: PSYC 2500H
• Professor: Nancie Im- Bolter

Document Summary

Cephalocaudal development (sequence of physical maturation & growth that proceeds from head to tail) Proximodistal development (sequence of physical maturation & growth that proceeds from the center of the body to the extremities) Skull bones are separated by 6 soft spots (fontanelles) that are gradually filled by minerals to form a single skull by age 2, with seams/sutures allowing skull to expand as brain grows. Skull & hands mature first & done by 18, legs develop until mid teens. Born with all muscle fibers you will ever have. Muscle tissue is 35% water at birth but muscle fibers begin to grow as the cellular fluid is boosted by protein and salts. Brain is 25% of its adult weight at birth, by age 2 it has grown to 75% of it adult weight. Brain growth spurt (period btwn 7th prenatal month & 2 years when more than of child"s eventual brain weight is added)