Gray’s comparator model brings the role of the hippocampus into focus. In the su
ID: 3509285 • Letter: G
Question
Gray’s comparator model brings the role of the hippocampus into focus. In the subicular complex of the hippocampus, Gray hypothesizes that information from the outside world is “compared” to information in storage from prior experience (this generates the theta wave pulse found in that part of the brain). If the incoming information is considered new and different, what happens in the motor cortex?
According to Gray’s comparator model, the new information from the environment is processed in either the septic-hippocampus region or the serotonergic region depending on the rewarding or the aversive nature of the stimulus, respectively. If the information has positive consequences, then it activates the behavior activation system (BAS), causing arousal of the sympathetic motor nerves and leading to motivated behavior. However, if the new information leads to punishment and other negative effects, it triggers the Behavior Inhibition System (BIS) of the brain, which involves the septohippocampal system and its monoaminergic afferents from the brainstem. This leads to a series of avoidance responses by activation of the parasympathetic motor nerves leading to palpitation, increased heart rate, trembling of hands, dilation of pupils as seen in emotional responses of fear.
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If the information is considered similar to what has been experienced in the past, what happens in the motor cortex?
Explanation / Answer
Answer:- If the information is considered similar to what has been experienced in the past then-
According to Gray’s comparator model, the new information from the environment is processed in either the septic-hippocampus region or the serotonergic region depending on the rewarding or the aversive nature of the stimulus, respectively. If the information has positive consequences, then it activates the behavior activation system (BAS), causing arousal of the sympathetic motor nerves and leading to motivated behavior. However, if the new information leads to punishment and other negative effects, it triggers the Behavior Inhibition System (BIS) of the brain, which involves the septohippocampal system and its monoaminergic afferents from the brainstem. This leads to a series of avoidance responses by activation of the parasympathetic motor nerves leading to palpitation, increased heart rate, trembling of hands, dilation of pupils as seen in emotional responses of fear.
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