3. The nerve cell

Question 1

what are the 6 working assumptions over neurons?

Answer 1

1. neurons work using an integrate and fire action
2. connections are either excitatory or inhibitory
3. idealized neurons are used in artificial neural nets to model brain function
4. neurons typically form two-way pathways, providing the basis for re-entrant connectivity
5. the nervous system is formed into arrays or maps of neurons
6. hebbian cell assemblies underlie the change from transient to stable, lasting connections

Question 2

what kind of connections do neuronal arrays usually have?

Answer 2

two way connections

1. implicit feedforward connections
2. explicit feedback connections

Question 3

what is hebbian learning?

Answer 3

“neurons that fire together, wire together”

1. long term potentiation
2. long term depression

Question 4

what are the 3 types single cell recordings?

Answer 4

1. intra cellular
2. extra cellular
3. multi unit recordings

Question 5

what is neural code?

what is NOT neural code?

Answer 5

neural code: coding through spike rate and frequency

NO amplitude

Question 6

single cell recordings measure …?

EEG sensitive to…?

Answer 6

single cell recordings measure actions potentials

EEG are sensitive to synaptic potentials of millions of neurons