ch 2

Question 1

neuron doctrine

Answer 1

the idea that individual cells transmit signals in the nervous systems and these cells are not continuous with other cells as proposed by nerve net theory

Question 2

Nerve net

Answer 2

provided a complex pathway for conducting signals uninterrupted through the network

Question 3

Cajal also came to other conclusions about neurons:

Answer 3

1)Synapse:small gap between end of a neuron’s axon and the dendrites
2) neural circuits
3)in addition to neurons in the brain, there are also neurons that are specialized to pick up information from the environment such as in the eye,ear(these are called receptors)

Question 4

action potential

Answer 4

Nerve impulse is transmitted down axon when neuron’s receptor is stimulated

Question 5

feature detectors

Answer 5

neurons that respond to specific features of a stimulus

Question 6

Hierarchical processing

Answer 6

neurons at higher level of visual system process complex stimuli, lower levels process simple stimuli

Question 7

Specificity coding

Answer 7

idea that an object could be represented by the firing of a specialized neuron that responds only to that object

Question 8

cortical equipotentiality

Answer 8

idea that the brain operated as an indivisible whole as opposed to specialized areas)

Question 9

default mode network

Answer 9

A network was discovered that responded when people were not engaged in tasks