PSYC 1100 1nd Edition Lecture 7 Outline of Last Lecture I Nerve Impulse II Communication across the Synapse Outline of Current Lecture I Communication across the Synapse continued II Nervous Systems a Somatic Division b Autonomic Division i Sympathetic branch ii Parasympathetic branch III Brian a Hindbrain b Midbrain c Forebrain Current Lecture I Communication across the Synapse continued 4 Neurotransmitters may open a gate to let Na inside excitatory more likely to fire because potential is getting smaller toward 55mV or they may open gate that pushes positive K ions out inhibitory less likely to fire because potential is getting larger ex 70 71 72 II Nervous Systems Central Nervous System CNS Center includes brain and spinal cord Peripheral Nervous System away from center includes everything except brain and spinal cord b Somatic Division body nerve fibers connecting to muscles senses c Autonomic Division ANS self rule regulates vital functions heart rate breathing digestion etc i Sympathetic branch with feeling excited states energy consuming arousal mobilized for emergency speeds heart and lungs inhibits digestion and sex etc ii Parasympathetic branch goes with sympathetic vegetative states energy conserving or storing calm maintains normal functioning slows heart and lungs etc These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute III Brian bottom to top inside to outside old to new a Hindbrain Medulla breathing heartbeat blood circulation pons arousal and attention Cerebellum integration of muscles to perform fine movements but no coordination direction of these movements balance b Midbrain forms movements into acts controls whole body response to visual and auditory stimuli c Forebrain Thalamus sensory and motor relay center to various cerebral lobes Hypothalamus controls response to basic needs food temperature sex Basal Ganglia regulates muscle contractions for smooth movements Limbic System memory hippocampus and emotion amygdala Cerebral Cortex or neocortex four lobes frontal parietal occipital temporal seat of higher intellectual function