Download Powerpoint slides

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Neuropsychopharmacology wikipedia, lookup

Synaptic gating wikipedia, lookup

Channelrhodopsin wikipedia, lookup

Nervous system network models wikipedia, lookup

Evoked potential wikipedia, lookup

Single-unit recording wikipedia, lookup

Rheobase wikipedia, lookup

Electrophysiology wikipedia, lookup

Biological neuron model wikipedia, lookup

Stimulus (physiology) wikipedia, lookup

Spike-and-wave wikipedia, lookup

Neural coding wikipedia, lookup

Chemical synapse wikipedia, lookup

Molecular neuroscience wikipedia, lookup

Neuroanatomy wikipedia, lookup

End-plate potential wikipedia, lookup

Neurostimulation wikipedia, lookup

Nonsynaptic plasticity wikipedia, lookup

Action potential wikipedia, lookup

Neural oscillation wikipedia, lookup

Resting potential wikipedia, lookup

Axon wikipedia, lookup

Multielectrode array wikipedia, lookup

Clinical neurochemistry wikipedia, lookup

Membrane potential wikipedia, lookup

Development of the nervous system wikipedia, lookup

Metastability in the brain wikipedia, lookup

Transcranial direct-current stimulation wikipedia, lookup

Neurotransmitter wikipedia, lookup

Synaptogenesis wikipedia, lookup

Axon guidance wikipedia, lookup

Node of Ranvier wikipedia, lookup

Neuromuscular junction wikipedia, lookup

Microneurography wikipedia, lookup

Holonomic brain theory wikipedia, lookup

Neural engineering wikipedia, lookup

Endocannabinoid system wikipedia, lookup

Recurrent neural network wikipedia, lookup

Cognitive neuroscience wikipedia, lookup

Aging brain wikipedia, lookup

History of neuroimaging wikipedia, lookup

Positron emission tomography wikipedia, lookup

Long-term depression wikipedia, lookup

Brain–computer interface wikipedia, lookup

Electroencephalography wikipedia, lookup

Transcript
Neural Communication
Psychology 2606
Introduction
It was pretty clear early on that electricity
played a role of some sort in neural
communication
 Galvani, frogs’ legs and lightning
 Fritsch and Hitzig stimulated cortex of
various animals, got twitches
 Bartholow and Mary Rafferty
 Dr. Penfield, I smell burnt toast

EEGs are AOK
Caton
 Helmholtz
 Hodgkin, Huxley and giant axons
 Used mircorelectrodes and oscilloscopes
to measure the resting potential of a
neuron
 -70 mV

Electrical activity of the neuron

Resting potential
About -70 mV
 Selectively allowing certain ions in
 With stimulation Na+ is allowed in


Action potential
Changes in one area lead to changes in
another
 Chemical to electrical, very cool

The Sodium Potassium Pump





Active transport takes
energy
Easier encoding?
Faster reaction?
An Action potential
happens when
stimulation causes the
pump to sort of stop, Na
gets in, K goes out
Sort of reversed later
integration
Excitatory postsynaptic potentials
 Inhibitory postsynaptic potentials
 Temporal summation
 Spatial summation

The axon Hillock
Where the axon starts
 many voltage sensitive channels
 Need oh say -50 mV for depolarization
 Not all graded potentials are equal

Sensation and movement









Receptors for
Light
Sound
Smell
Taste
Touch
Pain
Cold
heat
movement
Neuron synapses onto end plate
 Big channels
 Acetylcholine
 Ach antagonists can cause paralysis
 Curare
 Sarin

EEG

Oldest form of brain
imaging
CAT Scan

Computerized axial
tomography
PET scan

Positron emission
tomography
MRI

Magnetic Resonance
Imaging
ERPs and single cells
Event related potentials
 Used to see what is lit up, pretty cheap
 Single cell recording uses micro
electrodes
