1. Anatomy of the Central Nervous System Lesson 5

2. Functional Anatomy: CNS n Major Divisions l Forebrain, Midbrain, Hindbrain l Know structure *name, location & general function n Major fiber systems n CNS vs PNS terminology l nucleus vs. ganglion l tracts vs. nerves ~

3. Forebrain - Cortex n Gray Matter l Somas and Dendrites (neuron cell bodies) n Organized in layers l some input, some output n Neocortex l 6 layers ~

4. Forebrain - Fiber Systems n White Matter - myelinated axons n 3 types of fiber systems l Commissural l Association l Projection ~

5. Commissural Fibers n Interconnect homologous structures in the two hemispheres l Corpus Callosum l Anterior and Posterior l Hippocampal ~

6. Anterior

7. Forebrain Fibers Systems n Association Fibers l interconnect cortical areas within each hemisphere n Projection Fibers l all other *CNS fiber systems l Fornix l Corticospinal tract l Mammillothalamic tract n Naming convention ~

8. Association Commissural Projection Hemispheres Left Right

9. Forebrain Subcortical Areas n Diencephalon l Surrounds 3rd ventricle n Thalamus l sensory and motor relay nuclei n Hypothalamus l motivation & emotion ~

10. Thalamus n Lateral Geniculate Nuclei l LGN l vision n Medial Geniculate Nuclei l MGN l audition ~

11. Hypothalamus n 4Fs l Feeding l Fighting l fleeing, and... l mating n Controls the pituitary gland ~

13. Subcortical: Limbic System n Emotion; Learning & Memory n Structures l Cingulate gyrus l Hippocampus l Amygdala l Thalamus l Hypothalamus l Mammilary bodies l Olfactory bulbs l Fornix ~

14. Limbic System

15. Subcortical: Basal Ganglia n 3 motor nuclei l Caudate l Putamen l Globus Pallidus ~ Striatum

18. Midbrain n Surrounds cerebral aqueduct n Tectum l Superior Colliculi - vision l Inferior Colliculi - audition n Tegmentum l substantia nigra - motor l Reticular formation sleep/wake cycle l many other nuclei ~

20. Cross-section of Tegmentum Dorsal

21. Hindbrain n Cerebellum l coordinates movements n Pons l Sleep and arousal n Medulla l vital functions l many cranial nerves ~