1. Nervous System

2. Functions: Homeostasis Memory Senses Components: Brain, Spinal Cord, Nerves, receptors, ganglia, tracts Can be organized anatomically and physiologically

3. Overview of the Nervous System

4. Anatomically: Central: Brain Spinal Cord Peripheral: Nerves Receptors Ganglia Physiologically: Afferent (Sensory) receptors Efferent (Motor) somatic autonomic Sympathetic Parasympathetic

6. There are 2 types of cells in the Nervous System: 1)Neurons 2)Neuroglial cells

7. The Neuron

8. Dendrites incoming Cell Body integration Axon output Axon Terminal release of neurotransmitter A Typical Neuron Nodes of Ranvier

9. Neurons can be categorized by the number of processes and function

12. All or None Spatial Summation different all at once Temporal summation one many times in concession

14. The Biochemistry of the Synapse

17. Neuroglial Cells The Neuroglial Cells

18. Saltatory Conduction

21. Tay Sachs Multiple Sclerosis Gray matter White matter

23. Nervous System Terminology Gray Matter – mostly nerve cell bodies. White Matter – mostly myelinated axons. Nerve fiber – a single axon of a neuron. Tract – a bundle of axon ins the CNS. Ganglion – a cluster of nerve cell bodies in PNS. Nucleus – gray matter in CNS with common function. Nerve – a bundle of axon in the PNS.

24. Sulci (sulcus) – grooves on surface of cerebrum. 1) Sensory areas 2) Association areas 3) Motor areas Three kinds of cerebral functional area: Gyri (gyrus) – fold of brain tissue between sulci. Fissure - deep groove, separating hemispheres.