PSY 101 Neuroscience
PSY 101 Neuroscience PSY 101 08
Popular in Intro to Psycology
Popular in Psychology (PSYC)
This 2 page Class Notes was uploaded by Kaity Notetaker on Monday October 3, 2016. The Class Notes belongs to PSY 101 08 at Grand Valley State University taught by Joel Quamme in Winter 2016. Since its upload, it has received 7 views. For similar materials see Intro to Psycology in Psychology (PSYC) at Grand Valley State University.
Reviews for PSY 101 Neuroscience
Report this Material
What is Karma?
Karma is the currency of StudySoup.
Date Created: 10/03/16
CHAPTER 3 – NEUROSCIENCE I. Neurons Nerve cells that are basic building blocks of the nervous system Structure and Function: 1. Cell body: (soma) controls metabolic activities 2. Dendrites: (“tree branches”) receive information/ where information is taken in 3. Axon: sends messages (limbs, organs) to stimulate hormones and other stimulations 4. Myelin Sheath: fatty substance wrapped around axon acting as an electrical insulator to speed up signals through the axon. 5. Axon Terminal: Where messages coming from axon will end up to signal out messages causing a release of chemical to next/neighboring neurons Resting Potential: While a neuron is at rest, it will maintain a negative charge relative to the outside if the cell (-70mv) Can be measured by getting the electrical voltage of 2 points (inside and outside) Neural Communication: Inputs from neighboring cells either excite (+) or inhibit (-) the neuron a little bit “All-or-None” Law: When the total excitation (+) reaches Threshold and an output signal is sent the next neuron Action Potential: brief electrical charge travels down the axon (towards other neurons) Synaptic Transmission: Triggered by action potential, primarily chemical communication between neurons; input to the next cell Neurons are separated by a small space (synapse) Action Potential reaches axon terminal Neurotransmitter (NT) chemicals are released into the synapse NT binds to receptor site (like a key) on the next neuron, opening ion channels that excite of inhibit Sending neuron takes back excess neurotransmitter (reuptake) II. Neurotransmitters Glutamate: General excitation (mostly in the brain) GABA: General inhibition Acetylcholine: muscle movement (contractions) and cortical arousal- skeleton Dopamine: motor function, reward processing (value) Schizophrenia – too much Parkinson’s – not enough Serotonin: Mood, sleep, arousal (general, alertness or zoned out) Depression – low levels Norepinephrine: Alertness, hunger, sleep (level of activity) Synthesized from adrenaline