Pitt NROSCI 0080 - Exam 1 Study Guide (9 pages)

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Exam 1 Study Guide



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Exam 1 Study Guide

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Pages:
9
Type:
Study Guide
School:
University of Pittsburgh
Course:
Nrosci 0080 - Brain and Behavior
Brain and Behavior Documents

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NROSCI 0080 1st Edition Exam 1 Study Guide Topic 1 Development of the Nervous System Structural development can predict behavior How when areas develop similar for similar systems Behavior can be used to predict structure There are factors that influence both structure and behavior injury hormones etc and can be studied both Induce injury see what behaviors are modified Induce behavior see what structures are activated suppressed About 2 weeks after fertilization the blastocyst migrates from the fallopian tube and implants into the uterine wall and forms the embryonic disc This embryonic disc becomes the baby and everything else becomes the amniotic sac and placenta The cells of the embryonic disc differentiate and form 3 distinct layers 1 Endoderm 2 Ectoderm Becomes the nervous system 3 Mesoderm The ectoderm thickens in the center This thickening forms the neural plate The bottom of the neural plate grows much faster than the top causing it the neural plate to curl up This curling forms the neural groove the midline of the structure The curling edges eventually meet and fuse at the top This forms the neural tube This hollow structure becomes the central nervous system and the neural pores at each end remain open for 3 weeks If the anterior pore fails to close anencephaly results fatal condition no brain If the posterior pore fails to close spina bifida results lower spinal nerves cannot reach their destination in the legs loss of motor control and sensation The developing neural tube forms three main bulges that form the various parts of the nervous system 1 Forebrain bulge forms the telencephalon and diencephalon a Telencephalon develops into the cortex and limbic system b Diencephalon develops into the thalamus and hypothalamus c The lateral and third ventricles also develop from the forebrain bulge 2 Midbrain bulge forms the mesencephalon a Mesencephalon develops into the tectum and tegmentum b Cerebral aqueduct 3 Hindbrain bulge forms the metencephalon and



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