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Habituation and Innate Behaviour Patterns

Habituation and Innate Behaviour Patterns. Psychology 3306. Innate behaviour. Why talk about this in learning? Well, learning often involves innate behaviour Many of the rules are similar Gives some perspective, i.e., not all behaviour is learned. Thermoregulation. Set Point.

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Habituation and Innate Behaviour Patterns

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  1. Habituation and Innate Behaviour Patterns Psychology 3306

  2. Innate behaviour • Why talk about this in learning? • Well, learning often involves innate behaviour • Many of the rules are similar • Gives some perspective, i.e., not all behaviour is learned

  3. Thermoregulation Set Point Effectors Controlled Variable Gain: Vasoconstriction Shivering Loss Dilation Sweating panting Feedback Feedback mechanisms can be + or – or both

  4. Reflexes • Stereotypic in response to a stimulus • Sensory -> inter -> motor neurons • Some quite complex behaviour can come of such simple connections and in relatively simple animals

  5. In a Moth’s Ear…. • Moth Ear basically has two neurons A1 and A2 • They are not frequency sensitive, but do not respond to low frequencies

  6. Those would be some tiny Q tips…..

  7. Do Moths Have Ear Wax? • A1 is responsive to intensity • More firing with closer bat • A2 only fires with very loud sounds • A2 fires, bat must be very close

  8. Moths and Bats, Charts and Graphs • A1 on the left fires, that wing beats faster • Moth’s course corrects to 180 degrees from bat • So very and totally cool • A2, go crazy • 2 neuron ear can encode where a predator in in 3 dimensional space!!!

  9. Examples • Its not just me that thinks this is way cool

  10. Behavioural Sequences • Fixed action patterns • Everyone does it • Not prior learning • Rigid sequence

  11. Examples • Dust bathing in Burmese Red Junglefowl • Ancestor of our KFC • Function of the behaviour is to clean out oil from the feathers and to get rid of parasites. • Some birds bathe in water, others in dust

  12. Animal starts out by fluffing up some dust

  13. Next is a bill scratch, which gets the dust up onto the neck

  14. Lots of scratching goes on to work up a bit of a cloud really

  15. Dustbathing • This is actually pretty complex beahaviour • Vestergaard, Hogan and Krujt (1990) found that junglefowl don’t need dust! • Hogan and Van Boxel (1993) found that dustbathing was already rhythmic at 14 days post hatch

  16. Etholodgy is cool • Reaction chains are sequences of FAPs • You can tell it is a reaction chain and not an FAP if the animal can stop the behaviour • We have reduced all of ethology down to a few power point slides…….

  17. Habituation • Decrease in the strength of a response after repeated presentation of a discreet stimulus • Getting used to it, sort of • NOT sensory adaptation or simply fatigue • Stimulus specific • Orienting response • Startle response

  18. The rules • Thompson and Spencer (1966) • Gradual with time • Withhold stimulus and response will reoccur • Savings • Intensity • Overlearning • Stimulus generalization

  19. Pokin’ aplysisa • Kendel et al • Gill withdrawal • Seonsory -> motor pretty much • Less transmitter released into synapses! • Decrease in Ca current • Similar results in cats • Because of its generality, habituation is often thought of as the universal learning paradigm

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