Class 4
Finish The Neural Impulse Remind about Resting Potential The Action Potential The Voltage Cycle All-or-None Law All action potentials same size Action potential stays sames Size as travels How does the action potential happen chemically What does this mean? Saltatory Conduction Refractory Periods Absolute : Basically Sodium Channel is Open Lasts ~ 1 ms Relative : Rest of action potential till after overshoot is done Lasts 1-2 msec Synapses found: http://web.lemoyne.edu/~hevern/psy340/lectures/psy340.03.1.synapse.html source unknown. Synaptic Transmission Production Storage Release Binding Removal - Destruction and Reuptake From "Action at the Synapse" the Psychology Place now owned by Pearson Ed. Generating a New Action Potential Summation Spatial Summation Temporal Summation from: http://www.colorado.edu/kines/Class/IPHY3730/04nervephysiology.html Let us See Summation in Action The Brain General Organization The Brain is divided into four lobes Frontal Parietal Temporal Occipital The Thalamus Source unknown The Cortex Is the surface of the brain, about 1/4" thick Is composed of 6 layers Netter, Ciba Collection of Medical Illustrations Source unknown Different parts of the cortex perform different functions, e.g.: Visual Cortex: Occipital Lobe Auditory Cortex: Temporal Lobe Somatosensory Cortex: Parietal Lobe: Postcentral Gyrus Motor Cortex: Frontal Lobe: Precentral Gyrus