Structure of the Nervous System
*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.
*Section made through the brain parallel to the ground.
*Section parallel to neuraxis and perpendicular to the ground.
*Midsagittal Plane – sagittal section through corpus callosum.
Functional MRI scans of a healthy brain
*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 – a set of holes within the brain filled with CSF.
*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
*Comprised of the telencephalon and diencephal