BCS 110 Lecture Notes - Lecture 5: Primary Motor Cortex, Precentral Gyrus, Resting Potential
29 Oct 2018
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Document Summary
Big cut from front to the back. Major fissures divide each hemisphere into four lobes: frontal, parietal, temporal, occipital. Primary motor cortex (allows to move our body) Amygdala (emotional center) and hippocampus (involved in memory) in temporal lobe. Limbic system- emotional center and learning & memory. Striatum, globus pallidus and substantia nigra (color nuclei sitting in mid-brain) Superior central gyrus: temporal lobe, it"s the auditory system. Every cell in our body is a little battery. Different from other side (resting membrane potential) = -70mv. In its resting state, a neuron is said to be polarized. How to create these little batteries (ionic basis of the resting potential) Lipid bilayer : inside: potassium, outside: chloride, sodium. Sodium is positively charged, and chloride is negatively charged. Anions maintain overall charge neutrality on both sides of the membrane. Random motion: a lot of potassium want to diffuse around the room; particles tend to move down their concentration gradient.
