module 2 notes

module 2 notes - Behavioural Neu roscience Neuron: basic...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Behavioural Neuroscience Neuron: basic cell that makes up the nervous system Peripheral nervous system: all the other nerves that run through the body which aren’t the brain or spinal cord Central nervous system and brain: probably one of the frontiers we understand least in pysch Endocrine system: hormones, diff chemicals floating thru blood, influencing us Example of hunger: not separate systems; work together and influence each other Neuron: Myelin sheath: globular part not found in the brain, lets the electric current bounce from node to node so the impulse can travel fast, neurons which are part of the peripheral system and spinal cord actually work faster than brain Dendrites: back end Axon: front end and middle chain Cell body: cell’s life support centre Neural impulse travels from dendrite to axon’s terminal branch A chemical reaction that creates electricity: action potential Study of sea slugs, which have large neurons Movement of ions in and out of cell membrane, the change in charge of flow: creates electricity and causes it to flow down the neuron
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Synapse: when axon terminal almost touches next dendrite, synaptic gap As the electric pulse comes down (action potential) breaks out chemicals in between, changes the release of ions in the next neuron (vesicle containing neurotransmitters) Complex combo of many synapses coming together at once to determine whether the next one fires, then reuptake Neurotransmitters: Many kinds Dopamine: o Very common, especially in the brain o Deficiency of dopamine is part of cause of Parkinson’s, marked by tremors o Very important in coordination of movement o Attention, emotion o Schizophrenia: marked by excess of dopamine in various brain parts Serotonin: o Involved in mood, hunger, sleep, arousal o Affects things widely in the brain o Deficiency of serotonin: cause for insomnia o Deficiencies also associated with depression Norepinephrine: o More related to alertness and arousal o Also associated with depression Acetylcholine:
Background image of page 2
o Most common neurotransmitter o Involved in muscle movement o Common throughout the brain, by far the most common neurotransmitter o Alzheimer’s Disease: neurons that work through acetylcholine get ruined with Alzheimer’s o Involved in learning and memory Endorphins: whole class of neurotransmitters o Involved in pain regulation o Body naturally releases these, which allow you to handle more pain o One of first neurotransmitters found o Heroine and morphine mimic endorphins How Drugs Affect Neurotransmitters: At synaptic gap: neurotransmitters coming across (with complex shapes) At dendrites: receptor sites which neurotransmitters can fit into Drugs mimic the shape of the neurotransmitter o Agonist: tricks the cell into thinking it’s a neurotransmitter, pretty close to correct shape; this is good if there is a deficiency of the neurotransmitter o Antagonist: mimics shape enough not to change neuron but blocks
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 06/26/2011 for the course PYSCH 101 taught by Professor Online during the Spring '09 term at Waterloo.

Page1 / 11

module 2 notes - Behavioural Neu roscience Neuron: basic...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online