PSY2002 SEMESTER 1 - WEEK 9

Question 1

summarise cognition regarding basis of behaviour, type of goal, systems, abilities

Answer 1

basis of intelligent behaviour, overriding reflexive/habitual response to favour complex, long-term goal, control sensory, memory, motor system
core vs higher order cog abilities, effort/attention required with no autopilot, top-down mental process

Question 2

name core cog abilities

Answer 2

IC, WM, CF

Question 3

name some higher order cognitive abilities

Answer 3

object permanence, self recognition, tool use/causal reasoning, ToM, mental time travel

Question 4

summarise Scala Naturae/ladder of being

Answer 4

instinct think certain animal more intelligent than others in hierarchical ‘degree of perfection’ related to how close they’re related to us (gorilla most intelligent, then reptiles, then fish)

Question 5

summarise Bloch (2019) fish sample delay for scala naturae

Answer 5

got them to learn a pattern to get rewards and believed this showed fish have WM, found frogs can do learned inhibition (can inhibit instinctual response)

Question 6

what is found in lizards, and birds

Answer 6

lizard= IC
crows, ravens= WM

Question 7

why are human seen as dominant?

Answer 7

cortex, PFC larger than other mammal, associated with core cognition, EF

Question 8

what is cortex

Answer 8

laminated (layered) multiple layers with different neurons doing different role, allowing complex higher order cognition

Question 9

compare birds to humans regarding cortex

Answer 9

no neocortex/laminated cortex but can do similar tasks to humans
= debate about why cortex is viewed as special

Question 10

summarise WM

Answer 10

short-term representation of items held in consciousness and can be manipulated. key neural structure is in PFC
not passive

Question 11

what can action potentials (spike trains) measure, tell us

Answer 11

can measure electrical activity of extracellular space around neuron and amount of firing to tell us how much processing taking place in neurons

Question 12

summarise monkey delay activity (Niki, 1974) finding a neural correlate between neuronal activity and WM- method

Answer 12

delayed response task; 2 lights, 2 buttons. 1/2 cue lights illuminated for 1s on left/right
cue illumination off for 2-3s (delay period)
monkey pick between l/r button

Question 13

summarise monkey delay activity (Niki, 1974) finding a neural correlate between neuronal activity and WM- results

Answer 13

performed well
measured PFC- found spike trains (neuron firing) with initial spike at presentation of cues, sustained spike trains during delay (delay activity- persistent firing rate, bridging gap between stimulus presentation and choice being made)
then see sharp increase/sustained increase in firing rate, reflecting WM (monkey hold onto info, makes decisions)

Question 14

describe what delay period tasks find regarding WM in monkeys (mention firing rates, spike trains)

Answer 14

delay activity is persistent firing rate bridging gap between stimulus and choice
monkey holds onto info during delay period and then see sharp increase then sustained increase in firing rate, reflecting WM processing (hold onto info, make decision)
less activity = monkey no longer needing info, its made its decision

Question 15

give strength of delay activity tasks in monkeys

Answer 15

high validity, seen in multiple studies

Question 16

outline role of dopamine in classical conditioning, found with neuron fires

Answer 16

providing reward shows sustained spike activity of neuonrs firing dopamine
but if provide with CS, see actual dopaminergic responses tied to CS not reward (anticipation) and actual reward shows decreased activity

Question 17

how can we tell if dopaminergic spike activity reflects WM

Answer 17

dopamine is neuromodular, respond to sensory stimuli which predicts future reward
so need to be mindful that dopamine tied into reward circuitry, importance of anticipation as well

Question 18

what do critics suggest about studies using monkeys to find neural basis for WM

Answer 18

monkey isn’t manipulating, instead just holding onto info so not really studying their WM

Question 19

what parts of brain do bird not have

Answer 19

no neocortex but still has subcortical structures like basal ganglia

Question 20

because bird brain appear more primitive, what is it believed they are unable to do

Answer 20

reason, however just because brain different to human, doesn’t mean cannot do what we do

Question 21

what part of bird brain is believed similar to human cortex

Answer 21

nidopallium caudolaterale (NCL)

Question 22

what is NCL (structure and function)

Answer 22

grey and white matter covering cerebrum
higher order association area, many dopaminergic innervation and receive afferent from secondary/tertiary sensory areas of all modality
project to most of somatic/limbic striatum, motor output structures
organised in nuclei

Question 23

what similarities between NCL and PFC

Answer 23

similar connections, with amygdala, nucleus accumbens, visceral structures

Question 24

NCL in WM has evidence from delay activites, what are these

Answer 24

single-cell studies in pigeons
trained to learn that remembering stimuli necessary to receive reward
reflected in NCL neuron in memory phases, suppressed when remembering stimulus was not needed

Question 25

what insight-related cognitions can bird show?

Answer 25

object permanence, ToM, tool use

Question 26

what birds is object permanence seen in

Answer 26

awareness object exist even if out of sight corvids (ie, magpie)

Question 27

give example of how ToM shown in birds

Answer 27

attribute own mental state and possible future behaviours to another ravens show this for food catching behaviours

Question 28

outline how birds show mental time travel

Answer 28

recollecting past episode, anticipating future needs and motivating states corvid store foods, recovers them, plan breakfast, catch food at places they previously learnt to be hungry in

Question 29

outline how birds show tool use, and causal reasoning

Answer 29

selecting, manipulating objects in environment to utilise them in to achieve goal New Caldeonian Crow cut tool out of leaves, makes hook, lateralisation (start cutting tools from left side), meta-tool use (using 1 tool on another)

Question 30

define analogue

Answer 30

same/similar function even if structures different

Question 31

to test if NCL is functionally analogue to PFC, can use single unit recordings on WM tasks. apply using this on pigeons (Rose & Colombo), using auditoy cues, intervals, delay tasks -method

Answer 31

intertrial interval then sample (3 possible areas where stimulus can occur, diff stim each time) auditory cue= tells pigeon to remember/forget a. told to remember, 3s delay, make choice (overcome issue from Niki as no reward anticipation), select between 2 diff stim and have to remember what stim was, not just where it is b. have to forget

Question 32

to test if NCL is functionally analogue to PFC, can use single unit recordings on WM tasks. apply using this on pigeons (Rose & Colombo), using auditoy cues, intervals, delay tasks -results from remember and forgetting conditions, regarding neuronal firing rates

Answer 32

in remember condition, sustained activity of increased firing rates, consisten from cue to end of delay (bridges gap between S-R, is likely to be reflecting WM) forgetting condition: see activity stop

Question 33

why do we need to be careful when interpreting studies on WM regarding delay activity and neuron responding

Answer 33

abolished delay activity is linked to reward prediction so activity we see may simply be pigeon preparing the motor response to peck neurons able to change firing rate responding to forget (as no reward) discern between confounds of WM and reward prediction

Question 34

what do delayed match-to-sample tasks entale, how do these solve methodology issues

Answer 34

disentangle WM from motor preparation as stimuli location randomly change chance of reward equal for all match item, and randomised meaning reward expectation negated pre-sample break to reset neuronal activity, have to encode memory for picture, delay, then pick 1/4 images for answer may/may not receive reward

Question 35

what is found for crows on delayed match-to-sample tasks

Answer 35

very high performance

Question 36

when studying if differences in firing rates of different neuronal populations, like for NCL what is found

Answer 36

sample selective neurons, responding different to each of 4 images, suggesting type of stimuli impact WM encoding cannot be due to preparation of motor response showing discrimination between items, extra level of processing, provide evidence

Question 37

in conclusion, summarise relationship between NCL with WM, including neural bases

Answer 37

delay activity in NCL bridge time gap between stim, choice (evidence for neural basis of WM) neural circuit doesn't necessarily need neocortex both NCL, PFC are functionally analogue

Question 38

cannot train bees to do a WM task, what can be done instead

Answer 38

time how long take bee fly point A-B, make linear function, present bee with stimuli along the linear function (pattern) by changing distance between sample point and where makes decision can know how long they have to hold onto info for at end of tunnel have to decide which to enter

Question 39

on bee WM tasks, what was found, including WM duration

Answer 39

high performance in short delay task varying distance varied difficulty WM up to 6.5seconds

Question 40

how can bee WM study task be made a bit harder

Answer 40

put in some incorrect patterns before/after sample stimulus, with correct pattern always present at same distances from tunnel entrance results show bee ignores patter really well

Question 41

give advantages of studying cognitive functions in non-human animals

Answer 41

direct recordings AP (single cell recordings) which are very invasive high spatial, temporal accuracy - not possible from EEG, fMRI insight into cognitive nature, analogue of cognitions for different species

Question 42

give disadvantages of studying cognitive functions in non-human animals

Answer 42

it is invasive cannot self-report, need training on task task doesn't reflect typical behavour hard to design tasks not including any confound (reward anticipation, motor prep, STM vs WM)