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Infancy chapter 4 notes

by: Caoimhe Notetaker

Infancy chapter 4 notes Psyc3260

Marketplace > Tulane University > Psychlogy > Psyc3260 > Infancy chapter 4 notes
Caoimhe Notetaker
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Chapter 4 text notes
Dr. Bourgeois
Class Notes
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This 2 page Class Notes was uploaded by Caoimhe Notetaker on Saturday February 13, 2016. The Class Notes belongs to Psyc3260 at Tulane University taught by Dr. Bourgeois in Spring 2016. Since its upload, it has received 28 views. For similar materials see Infancy in Psychlogy at Tulane University.


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Date Created: 02/13/16
Chapter 4: The developing brain and nervous system 02/13/2016 ▯ EEG measures brain activity ▯ fMEG: used to study fetal brain activity through mothers abdomen ▯ fNIRS: uses infrared light to find spatial location of activity ▯ ▯ Cell body of neurons code and transmit info in currents called action potentials ▯ Synapse connects axon (of transmitting) to dendrites (of receiving cells)  Serotonin: alters mood by creating a state of quiet alertness and feelings of well being o Too little leads to feelings of depressions  Dopamine: helps controls attention, feelings of pleasure and optimism o Too much can lead to Scitco, too little leads to Parkinsons  Afferent neurons- sends singles to the brain (processor neurons analyze info)  Efferent: directly connected to muscles, effect internal/ external behavior ▯ ▯ Brain divided into: brainstem, limbic system, cortex  Brain stem: contains roots of afferent and efferent neurons of the autonomic nervous system o Autonomic: sympathetic (fight of flight); parasympathetic (rest and digest)  Limbic system: contains hippocampus, amygdala, hypothalamus, pituitary (last three play a role in development of responses to stress and trauma)  Cortisol: blood sugar; prepares body for action.  Cortex: outer layer; largest part of brain, divided into lobes, and two hemispheres Prefrontal: reasoning, planning, and organizing ▯  Birth- 4 years= critical for development o During 1 4 prenatal months- neurogenesis and migration towards specific regions o By birth 50% of prenatal neurons have died  Prenatal- synaptogenesis (connections between neurons) o Mylentiation- speeds up connections  Post natal- more complex neural networks o Experience- expectant: ready and waiting o Experience-dependent: due to experiences  4 basic functional networks o Arousal, attention, emotion o Info processing o Regulation and executive o Self awareness  Adverse early experiences have huge effect  Neural plasticity lasts through old age  Neuroception: unconscious evaluation of safety of threat  Mobilization: fight/flight  Immobilization: freeze/faint ▯ ▯


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