8119615
Description
Flashcards by Lizzy Attwood, updated more than 1 year ago
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Created by Lizzy Attwood
almost 8 years ago
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| Question | Answer |
| How many participants were there? | 2 kittens |
| How long per day did the kittens spend in the apparatus? | 5 hours |
| How old were the kittens to start with and for how long did it last? | From 2 weeks of age for 5 months |
| What were the properties of the visual display apparatus? | 46cm diameter cylinder Glass floor half way up High contrast black and white stripes (either horizontal or vertical) |
| Why was it okay that were there no control kittens? | There was already an established standard for cat brain development |
| What happened after 5 weeks in the apparatus? | Several hours a day in a well-lit room with objects inside |
| What were the 6 dependent variables? (what they wanted to observe) | 1. ability to move around 2. response to objects 3. jumping to the ground 4. judging distances 5. navigation 6. response to a rod held V or H |
| At what age were the kittens tested? | 7 months |
| How did they test the kittens after putting them under anaesthesia? | Presented either a V or H bright light to eyes - look to see reactions |
| How else did they test the kittens? | Natural startle response - rod moving towards the kitten |
| What variables were controlled? | Time in cylinder Type of cylinder The tests Age Conditions in general |
| In what way were the test kittens different from normal kittens in their navigating of the room? | Touch > sight Not as good at navigation |
| When would a kitten react to a rod? | ONLY when it was the same orientation of the stripes in which they were raised |
| Even though some of these problems disappeared after 10 hours, what remained impaired? (3) | Tracking of objects Bumping into objects Judgement of distance |
| 75% of neurones were ____________ | BINOCULAR |
| What was strange about the polar histograms of the neurone activity? | H cat = V neurones inactive within 20 degrees V cat = H neurones inactive within 20 degrees |
| Why did they conclude that changes are not the consequence of degradation? | No evidence of silent or missing cortical cells in the cortex |
| Neurones change preferred orientation due to what? | Stimulation of the visual cortex recieved |
| Does this suggest that brain plasticity is NATURED or NURTURED? | Nurtured |
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