PSY492H1 Chapter 2: The Neurobiology of Memory and Learning Chapter 2
Document Summary
Chapter 2 mechanisms of synaptic plasticity: introduction. Memory trace (engram): a sustained neural representation of a behavioural experience: karl lashley (1950) tried and failed to locate and engram . Gill withdrawal reflex: a defensive behavior the animal displays when its skin is stimulated (gill normally used for oxygen: gill contracts when siphon is touched, modified by experience. Habituation: the magnitude of the response decreases with repeated stimulation (from non-noxious stimuli); generally, the amplitude of responses decrease. Sensitization: a larger response to a weak stimulus by previously applying a strong stimulus. The tail of the aplysia has a sensory neuron which makes a synapse on the modulatory interneuron. Has a trisynaptic circuit: neurons in the entorhinal cortex connect to the dentate gyrus in the perforant path, neurons in the dentate gyrus connect to. Ca3 region by mossy fibers: neurons in ca3 connect to neurons in.
