Flashcards in Learning Deck (56)
What long term synaptic changes occur in habituation?
Less presynaptic terminals of sensory neurons
Increase likelihood of behavior
What is the purpose of habituation?
Allow the organism to ignore old or non-important cues and focus on learning new or important info
In fear conditioning, where does info about the CS and UCS converge?
Lateral nucleus of the amygdala
Learned reaction to a CS. Sam effect as UCR
Three categories of responses to environment
Reflexes, instincts, and learning
What are habituation and sensitization both focused around?
Repetition of stimuli
How does the brain get information about UCSs?
Climbing fibers from the inferior olive (auditory pathway) of the medulla synapse on Purkinje fibers
How does learning occur in classical conditioning?
If the climbing fiber (UCS) and parallel fiber (CS) synapses onto a purkinje cell are activated at the same time
Is reinforcement or punishment more effective?
What supports the amygdala's role in fear conditioning?
Lesion, recording (more activity in fear conditioning), and application of NMDA antagonist (block and the fear response goes away)
What happens if you lesion the hippocampus of an animal after they have already gone through a water maze?
It is like they have never gone through the maze before and it is their first time
DIAGRAM ON PAGE 23
DIAGRAM ON PAGE 23
Why was eyeblink classical conditioned studied in rabbits?
They have a nictitating membrane which is an extra membrane on the eyes that acts like a second eyelid
What part of the brain provides information about CSs and how does it communicate the info?
Cerebellar granule cells. Receive input via mossy fibers from the pons and communicate with the purkinje cells via parallel fibers
What is the purpose of sensitization?
Allow the organism to focus on dangerous, irritating, or annoying stimuli. Inc response in hopes of it going away
Consequences of a behavior shape future performance
What can reinforcement and punishment both be?
Positive (add something) or negative (take something away)
Unlearned reaction to a UCS
Neuronal activity to reflexes
Single stimulus causes sensory neuron to release NT which causes motor neuron to release NT which causes a reaction
Where do the cerebellar granule cells receive info from and pass it to and how?
Receive input via mossy fibers from the pons and communicate with the purkinje cells via parallel fibers
Three tests of spatial learning
Mazes, water mazes, and food caching
What part of the brain is involved in classical conditioning? Involved in learning and movement
Grid cells. "Whats the environment"
What area of the brain is needed for learning to occur that was found in rabbits?
Interpositus nucleus of the cerebellum
Change in magnitude of response to environmental events. Habituation and sensitization
Difference between habituation and sensory adaptation
Habituation: Decrease the response
Sensory adaptation: Decreasing perception
Experience of one strong stimulus heightens the behavioral response to subsequent stimuli
Initially neutral stimulus that acquires the ability to signal important biological events. Learned cause