* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Brain
Neural engineering wikipedia , lookup
Cognitive neuroscience wikipedia , lookup
Donald O. Hebb wikipedia , lookup
Neural oscillation wikipedia , lookup
Embodied cognitive science wikipedia , lookup
Endocannabinoid system wikipedia , lookup
Aging brain wikipedia , lookup
Electrophysiology wikipedia , lookup
Neuroplasticity wikipedia , lookup
Caridoid escape reaction wikipedia , lookup
Mirror neuron wikipedia , lookup
Central pattern generator wikipedia , lookup
Neural coding wikipedia , lookup
Premovement neuronal activity wikipedia , lookup
Development of the nervous system wikipedia , lookup
Optogenetics wikipedia , lookup
Neuromuscular junction wikipedia , lookup
Holonomic brain theory wikipedia , lookup
Metastability in the brain wikipedia , lookup
Neuroeconomics wikipedia , lookup
Single-unit recording wikipedia , lookup
Channelrhodopsin wikipedia , lookup
Synaptogenesis wikipedia , lookup
Activity-dependent plasticity wikipedia , lookup
Biological neuron model wikipedia , lookup
Feature detection (nervous system) wikipedia , lookup
Pre-Bötzinger complex wikipedia , lookup
Nonsynaptic plasticity wikipedia , lookup
End-plate potential wikipedia , lookup
Neuroanatomy wikipedia , lookup
Clinical neurochemistry wikipedia , lookup
Nervous system network models wikipedia , lookup
Stimulus (physiology) wikipedia , lookup
Molecular neuroscience wikipedia , lookup
Synaptic gating wikipedia , lookup
Chemical synapse wikipedia , lookup
Physiology & Behavior Neurotransmission Jette Hannibal - Inthinking Standard/Learning Outcome B6 USING ONE OR MORE EXAMPLES, EXPLAIN THE EFFECTS OF NEUROTRANSMISSION ON HUMAN BEHAVIOR DEFINE THE COMMAND TERM Jette Hannibal - Inthinking Jette Hannibal - Inthinking The nervous system NS: gathers and processes information, produces responses to stimuli, coordinates the workings of different cells CNS (brain + spinal cord): receives, processes, interprets, and stores incoming sensory information (e.g. Taste, state of internal organs) PNS: deals with input and output of CNS through sensory and motor neurons. Jette Hannibal - Inthinking The nervous system Neurons: basic structural unit of NS Communication between neurons: electric conduction chemical transmission A large concentration of neurons in the brain and the spinal cord. 80% are found in the brain’s Cerebral cortex Structure of neurons Cell body or nucleus (contains DNA) Dendrites: Axons: the cell body. Terminal buttons: information transmission storage of neurotransmitters. Synaptic gap: between dendrites and terminal buttons. Where neurotransmitters “pass” information from neuron to neuron. Jette Hannibal - Inthinking Neuron Jette Hannibal - Inthinking http://learn.genetics.utah.edu/content/addi ction/reward/neurontalk.html Jette Hannibal - Inthinking Neuronal communication Within neurons: Action potential Between neurons: Synaptic transmission of neurotransmitters Jette Hannibal - Inthinking Action potential Electro-chemical messages AP occurs when a neuron sends information down an axon AP caused by an exchange of Sodium and Potassium ions across the neural membrane Jette Hannibal - Inthinking Neurotransmitters Chemical messengers from neuron to neuron. Messages may also travel from neurons to to muscles and organs in the body, such as lungs or the intestines. Jette Hannibal - Inthinking Synaptic gap Synaptic vesicles with neurotransmitters at one side of the gap (terminal buttons): presynaptic gap. Like “keys” Receptor sites for neurotransmitters (like locks) at the other side of the gap: postsynaptic gap 1/10000 of a second to travel across the synaptic gap Jette Hannibal - Inthinking Neurotransmitters Jette Hannibal - Inthinking Brief intro to principles of neurotransmission Intro to Neurotransmission Jette Hannibal - Inthinking Neurotransmitter processes Excitatory: increases the frequency of action potential Inhibitory: decreases the frequency of action potential De-activation: effect of neurotransmitter stopped (destroyed by special enzyme) Re-uptake: reabsorbed by the terminal buttons. Drugs can inhibit re-uptake so that the neurotransmitter remains longer in the synaptic gap Jette Hannibal - Inthinking Examples of neurotransmitters Dopamine: (inhibitory) Controls arousal levels in the brain; vital for physical motivation (e.g. associated with craving in addiction) Serotonin: (inhibitory) Controls mood and anxiety levels High levels of serotonin are associated with optimism. Acetylcholine (ACh): (excitatory) Controls activity in the brain connected with attention, learning and memory Noradrenaline: (excitatory) involved in mental arousal and elevated mood Jette Hannibal - Inthinking Dopamine and serotonin Jette Hannibal - Inthinking The reward pathway - dopamine Stimulation of the reward center is linked to release of dopamine Rats will continuously press a lever that gives a small electrical stimulation to the pleasure center Jette Hannibal - Inthinking A Song to Help http://www.youtube.com/watch?v=XP9IEo Cw5W4&safe=active Jette Hannibal - Inthinking