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ring adolescence period are brought about through the introduction of gonadotrophic hormones. This hormone is released by the pituitary gland of the endocrine glands, particularly during the onset and the entire duration of puberty (Boyd & Bee, 2006). According to Boyd and Bee (2006), the release of hormones such as testosterone in boys and estrogen in girls do cause the manifestation of both principal and secondary sex uniqueness by about the age of adolescent. Indeed during the first few years of puberty, the male and female reproductive organs matures up and are capable of respectively producing sperm in boys and ovum in girls. In the early adolescence stage, young women do begin their menarche (menstrual cycle). Moreover, the cerebral cortex does thicken for the duration of adolescence and by extension some parts of the brain is myelinated; and brings with it supplementary effectiveness in the neural pathways (Boyd & Bee, 2006).

Physically, there is also a notable heave in both lung and heart size and a decline in the rate of heart beat. In addition, at adolescence the bones situated in the forelimbs mature to nearly adult levels, with maturity startlingly occurring more rapidly in girls than boys. This hand bone maturity gives a timely boost in coordination. On the other hand, boys do outpace girls in development as well as thickening of the muscle during the adolescent ages, resulting into a surge in the strength of boys.

What are the major milestones related to cognitive developments in early and middle childhood? How does cognitive changes from early to middle childhood?

Physical development in a child attracts corresponding augment in cognitive abilities of the cerebral cortex and by extension neural pathways. It is highly believed that correlation exists between physical development and cognitive development. For instance, a French speaking Swiss psychologist, Jean Piaget did trust that the cerebral expansion spurts which occur during adolescence stage of human growth brings with a novel stage of cognitive development which he referred to as the formal operational stage. According to Piaget, during this formal operational stage an adolescent duly begins to grasp both abstract logic and reasoning (Patterson, 2008). Besides, it is during adolescence stage that the aptitude to control memory as well as cognitive activities begins to bear fruits in the areas such as memorization, text learning and even face recognition. Further still, amplifications in working memory competence give the adolescent the capacity to comprehend figurative language, proverbs and metaphors. What's more, advances in supposed logic permits an adolescent to guess the perceived effect of some actions and even behaviors. According to Patterson (2008), these advances allow for the accomplishment of invented audiences (mainly built from an apparent peer group). In This manner the adolescent has the rare ability to theorize and memorize about other individual's perceptions and by extension impressions of themselves; while, a little child only manages to view situations, circumstances and behaviors from their personal perspective. Patterson (2008) further hints that cognitive developmental advances are also directly connected to both experience and learning. That this applies mainly to higher-level cognitive abilities like abstraction that relies to a considerable degree on formal education.

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