Brain Lecture Notes
Brain Lecture Notes Psychology 102
Popular in Intro to Psychology
verified elite notetaker
Popular in Department
This 4 page Class Notes was uploaded by Tatyana Mims on Wednesday October 12, 2016. The Class Notes belongs to Psychology 102 at Southern Illinois University Carbondale taught by Hoane in Fall 2016. Since its upload, it has received 3 views.
Reviews for Brain Lecture Notes
Report this Material
What is Karma?
Karma is the currency of StudySoup.
You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!
Date Created: 10/12/16
Brain Lecture Notes T1: Nervous System o Central Nervous System Brain and Spinal Cord o Peripheral Nervous System Two parts: Somatic Nervous System- controls voluntary behavior Automatic Nervous System- Involuntary behavior o Controls involuntary behavior Two subdivisions: Sympathetic NS: prepares for emergencies, releases blood sugar, increases heartbeat, and increases blood pressure Parasympathetic NS: restores energy, promotes digestion, slows heartbeat, and lower blood pressure T3: Structure of the Neuron o Neuron structure: Information is received by dendrites (look like little tree branches), transmitted by the axon o The Neuron: Supporting Tissue Glial Cells Connective tissue that supports and provides energy for the neurons Myelin sheath Covering for the neuron Neurogenesis: the formation of neurons by stem cells (hot research area in biology and neuroscience) The Synapse: The small gap between neurons T4: The Action Potential o When a neuron is activated, an electrical impulse travels the length of the axon o This action potential is an all-or-nothing event o Its effect is to cause chemicals to be ejected from the end of the axon terminal o Neurotransmitters Chemical agents that communicate across the synapse Each molecule is a ”key” that fits a specific “lock” They may either excite or inhibit the second neuron Neural Transmission Axon terminals release neurotransmitters Neurotransmitters enters s synaptic gap Neurotransmitter binds to receptors that it fits Neurons Review o Axon Terminal C. Release neurotransmitters o Dendrites A. Receives information from neighboring neurons o Axon 2 B. Carries the message down the length of the neuron The Effects of Neurotransmitters o Many psychological and medical problems can be traced to changes in neurotransmitters: Low levels of serotonin are associated with severe depression Low levels of acetylcholine- Alzheimer’s disease Low levels of dopamine- Parkinson’s disease o Psychoactive drugs have their effects by altering the action of neurotransmitters o Some psychoactive drugs imitate neurotransmitters by stimulating/inhibiting neurons o Neurons: Communication Specialists of the Nervous System Neurons generally do not increase in number However, there is recent evidence that new neurons can beg grown from stem cells However, both axons and dendrites continue to grow at the synapse Stimulating environments produce greater changes in the synapse T5: Other Important Chemicals Endorphins o Natural opiates: They reduce pain, promote pleasure T6: Hormones 3 o Endocrine glands secrete hormones into the blood stream o Slower acting than the nervous system o Pituitary gland is the master gland: 4
Are you sure you want to buy this material for
You're already Subscribed!
Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'