Processing stream/Connection types

Question 1

Different types of processing streams are found

Answer 1

within and between circuits (in a neural network)

Question 2

Degree of convergence and divergence in connectivity is important in what?

Answer 2

in regions of the nervous system containing complex circuits comprised of large numbers of neurons (neocortex)

Question 3

Divergence

Answer 3

refers to the degree to which a neuron projects input to a large number of target neurons via axon collaterals
- Can also refer to the ability of one neurotransmitter to activate more than one r/c subtype

Question 4

Convergence

Answer 4

refers to the degree to which a neuron receives input from a large number of other neurons
- Can also be applied to the ability of different neurotransmitters to converge to affect same circuit or network

Question 5

Simpler definitions of divergence vs convergence?

Answer 5

Diverge = one signal to many targets
Converge = many signals to one target

Question 6

Types of circuits?

Answer 6

Hierarchical and Local

Question 7

Hierarchical circuit (sub types)

Answer 7

Each level is regulated by local circuits and all three types of processing occur within the circuit
-Serial, parallel, and reciprocal processing

Question 8

Serial processing

Answer 8

info flows from one area to another in sequence

Question 9

Parallel processing

Answer 9

info flows in a “side by side” manner

Question 10

Reciprocal processing

Answer 10

info flows back and forth

Question 11

Local circuit

Answer 11

Found within the hierarchical circuits and alter the processing at each hierarchical level –> can determine the info that is passed down to the next stage

Question 12

What are included in local circuits?

Answer 12

Feed-forward and feedback connections

-Excitatory and inhibitory connections