HD FS 229 Chapter Notes - Chapter 5: Prenatal Development, Executive Functions, Frontal Lobe
9 Feb 2016
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4% of its adult weight at fives months after conception. Brain system and midbrain are involved in basic reflexes and sensory processing. Also, digestion, elimination, and respiration: fairly well established at birth. Cortex- part of the brain linked to sensation, motor responses, thinking, planning, and problem solving. Growth continues to take place after birth. Parts associated with sensory and memory are among the earliest to mature. Frontal cortex- most directly involved with higher levels of cognition. Neurons- cells that carry electrochemical messages within various regions of the brain. Neuron migration: neurons move shortly after formation, takes place in the hypothalamus, brain stem, and cerebellum, formed by an inside out pattern of development. Nerve cells nearer the outer surface are younger than layers deeper in the cortex: glial cells- provide organization for these migrating cells, occurs especially during the seventh and eleventh week of gestation.
