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Lecture

PSYCH 261 CHAPTER 3

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Department
Psychology
Course
PSYCH 261
Professor
Deltcho Valtchanov
Semester
Summer

Description
Structure of the Nervous System Chapter 3 Directions *Anterior/Rostral = Front *Posterior/Caudal = Back *Dorsal = Top *Ventral = Bottom *Lateral = Toward the Side *Medial = Toward the Middle *Ipsilateral = Same Side *Contralateral = Opposite Side *Coronal, Cross Section or Frontal Section *Transverse section at right angles to the neuraxis. *Horizontal Section *Section made through the brain parallel to the ground. *Sagittal Section *Section parallel to neuraxis and perpendicular to the ground. *Midsagittal Plane – sagittal section through corpus callosum. Functional MRI scans of a healthy brain Meninges *Dura Mater – ‘tough mother’, outermost layer. *Arachnoid Membrane – middle layer. *Subarachnoid Space – space between arachnoid membrane and pia mater filled with CSF. *Pia Mater – final layer, adheres to brain surface. Ventricles *Ventricles – a set of holes within the brain filled with CSF. *Lateral Ventricles *Third Ventricles *Cerebral Aqueduct *Fourth Ventricle *Choroid Plexus – manufactures CSF. Development of the CNS *Neural Tube – origin of the CNS. *Ventricular Zone – inner lining of cells in the neural tube. *Progenitor Cells – cells in ventricular zone that develop into brain cells. *Symmetrical Division – phase of development where progenitor cells divide into two identical progenitor cells. *Asymmetrical Division – phase of development where a progenitor cell divides into one progenitor cell and one neuron. *Apoptosis – programmed cell death. Development of the CNS Forebrain *Comprised of the telencephalon and diencephal
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