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Perception and cognition > Action perception - HLP3 > Flashcards

Action perception - HLP3 Flashcards

1
Q

Why is action perception important? (5)

A
  • understand the actions and intentions of others
  • threat detection
  • positive or negative action?
  • building alliances
  • interact with potential mates
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2
Q

What are cells in V4 and cells in V5 particularly sensitive to?

A

V4 = colour
V5 = direction

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3
Q

Where does visual information go after the eye? (3)

A

LGN –> V1 –> along to the V5

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4
Q

What are some properties of V5 cells? (4)

A
  • larger receptive fields than V1
  • sensitive to moving stuff, direction and speed
  • contains a retinotopic map of the visual world
  • microstimulation of directionally sensitive ones biases perception of motion in that direction
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5
Q

Where is the V5 connected to?

A

the medial superior temporal cortex

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6
Q

What are medial superior temporal cortex cells sensitive to? (4)

A
  • translation
  • expansion
  • contraction
  • rotation
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7
Q

What are the 6 different percepts from biological motion stimuli?

A
  • actions
  • hand actions, facial actions, speech
  • gender
  • emotion
  • body weight
  • identity
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8
Q

What happens when you show people biological motion dots moving in the same way but from different starting points?

A

Don’t perceive them as a person

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9
Q

Where is there activation when perceiving a person in biological motion stimuli?

A

posterior superior temporal sulcus (pSTS)

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10
Q

What can improve biological motion recognition?

A

sound

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11
Q

Which children don’t preferentially observe biological motion?

A

with autism

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12
Q

What other interesting thing can people derive from biological motion?

A

emotion

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13
Q

When is there STS activation in terms of biological motion? (3)

A
  • observing it
  • imagining it
  • facial motion
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14
Q

where in the brain responds to rigid, non-articulated motion?

A

middle temporal gyrus

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15
Q

What happens as you go further down the STS?

A

responds more to the articulated nature of moving human stimuli

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16
Q

What are 3 study results showing when the hMT/V5 is active?

A
  • more when viewing moving squares than stationary ones
  • more when illusionary motion compared to no illusionary motion
  • more when a figure shows implied motion (also STS activation)
17
Q

Where does integration of form and motion happen? What will cells there respond to?

A

within the superior temporal sulcus - the cells will respond to a specific combination

18
Q

What do many monkey STS cells respond to?

A

linking implied motion to walking direction

19
Q

What is more likely to be happening than grandmother cells?

A

population coding of actions - output of multiple cells with different perception functions

20
Q

What do STS cells not specify to? (4)

A

lighting, size, position in space, instance

21
Q

What types of coding are there in STS cells? (3)

A
  • view-dependent
  • view-independent (allocentric)/ object-centred
22
Q

Which brain regions respond to bodies? Where are they close to?

A

EBA and FBA
close to face regions

23
Q

what is the hierarchy of object and body response size?

A

whole bodies > body parts > face parts > other objects and object parts

24
Q

What does disruption of the occipital face area impair?

A

face processing

25
Q

What does disruption of the lateral occipital area impair?

A

object processing

26
Q

What does disruption of the extrastriate body area impair?

A

body processing

27
Q

What is the difference between the STS and EBA/FBA?

A

EBA/FBA = static bodies and body parts
STS = dynamic actions

28
Q

What do we speculate about others’ goals? (2)

A
  • the goal is functional
  • phenomenal state (mind/agency behind the body)
29
Q

What 2 things do intentions imply?

A

ends and means (both are necessary for it to be an intention)

30
Q

What does the development of theory of mind involve?

A

the ability to differentiate the object or the mental state (goal) and the content of the mental state (how it’s represented)

31
Q

What does the temporal parietal junction do?

A

representation of specific contents of mental states, beliefs, theory of mind

32
Q

Where in the human brain responds to mouth movements? Where in the monkey brain?

A

human = STS
monkey = STWS

33
Q

What was found when comparing brain activity during sound (voice) and vision (lip reading) stimuli of someone reading a number list?

A

The auditory cortex responds to both, so does the STS

34
Q

Where is there more activity in the brain when seeing ASL gestures compared to nonsense gestures?

A

The STS

35
Q

What are some brain regions that process emotional body language? (4)

A
  • STS
  • amygdala
  • body processing network (EBA, FBA, STS)
  • emotion processing network (amygdala, anterior cingulate etc.)
36
Q

Which areas are highly reciprocally connected in terms of emotional body language?

A

the amygdala and the STS

37
Q
A

Perception and cognition (15 decks)

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