History The term ‘amygdala’ was first used by Burdach (1819) and referred to a set of nuclei in the brain (Aggleton & Saunders, 2000). In 1939, researchers Klüver & Bucy inflicted bilateral lesions of the inferior temporal lobe of monkeys in a laboratory in an attempt to reduce aggression. These lesions affected the cortical areas, amygdala, and the hippocampus. Later this became known as Klüver-Bucy syndrome, and consisted of symptoms such as psychic blindness, hypermetamorphsis, oral tendencies, and changes in emotional and sexual behaviors. Lesions of the amygdala made monkeys fearless of e.g. humans or snakes, and affectively flat, tame. This research brought recognition to the notion that the amygdala plays a significant role in the …show more content…
The limbic system was first recognized due to Franz Josef Gall (LeDoux, J., 1996). Franz Joseph Gall developed the idea of “phrenology” that focused on the study of the different variations of bumps on the human skull to be related to differences in behavioral and emotional functioning. The limbic system’s main function in the brain is to control emotional behaviors and certain forms of memories that are infused with emotion (amygdala). The amygdala is a part of the brain that forms the tail end of the basal ganglia within the rostral temporal lobe and is located near the hippocampus (Lambert, K.G. & Kinsley, C .H., 2005). The amygdala, as defined by the text, is an almond-shaped structure that functions as a part of the limbic system involved in regulation of emotion and sexual urges (Lambert, K.G. & Kinsley, C .H., 2005). In addition, the amygdala is comprised of a dozen or more sub regions that are not all involved in fear conditioning (LeDoux, J., 1996).
Primary Involvement The amygdala has been the subject of many researchers’ curiosity throughout the history of neurological science and neuropsychology. Multiple studies have been successful in identifying the role of the amygdala in the human brain and it’s primary
The research argues that PS affects the amygdala, a socioemotional control center in the brain that plays a significant role in the pathogenesis of neurodevelopmental psychiatric disorders. The claim is backed by several studies. PS plays a major role in abnormal psychological, cognitive, and behavioral outcomes in both human and animals. Charil
Due to its primary role in processing memory and emotional reactions, over the last decade and a half psychologists have been linking the amygdala to psychopathy. It is involved in aversive conditioning and instrumental learning and is thus involved in all the processes that, when impaired, produce the same functional impairments displayed by psychopaths. Two famous studies conducted by Tiihonen and Kiehl respectively have confirmed this. Tiihonen used a volumetric MRI to test and confirm the positive correlation between low amygdaloid volume and a high degree of psychopathy in violent criminals (measured by the Hare checklist-revised) while Kiehl used a functional MRI to prove reduced amygdala response during an emotional memory task in individuals who scored high on the Hare checklist-revised. However, both these studies along with numerous others were conducted using violent offenders as subjects rather than individuals with psychopathy. Although many psychopaths do exhibit violent tendencies, not all violent offenders are necessarily psychopaths. A study conducted by Raine is one of the few that did focus only on individuals exhibiting psychopathy. In his study Raine was able to show reduced prefrontal grey matter in his test subjects. Unfortunately though, he was unable to differentiate between grey matter in different regions of the prefrontal cortex. It is however clear that there is one region of the frontal cortex that could be
The amygdala is the area of the brain that is involved with emotional regulation and mood. This is the area that is affected by living the city.
In Chapter 8 “Where the Wild Things Are,” the author Le Doux looked at the how our brain regions and systems functioned during the development of anxiety disorders. He introduced many researchers’ ideas and theories such as Pavlovian conditioning and instrumental conditioning; then, he listed the brain regions that were associated with anxiety and fear conditioning such as hippocampus, amygdala, sympathetic nervous system, and various brain cortexes. He also explained how our brain became conditioned for different anxiety disorders.
Because of Patient SM’s condition, she has been harmed, held at gunpoint, and has even had history of being involved in domestic violence. She does not have the capability to learn from the situations she has been through. The amygdala is very important and it is also the reason why we connect fearful stimuli to a particular situation. Therefore, Patient SM lacks the ability to connect the stimulus and memories she has obtained through these situations.
Would I be able to support women who are ‘challenging’, to say the least, like Jude did with her example of Hortense?
(Pardo, Pardo et al. 1990, Wang, Luo et al. 2003, Carter and van Veen 2007, Schall and Boucher 2007, Weible, Rowland et al. 2009). The dorsal ACC (ACd) is considered as the cognitive component, while the ventral ACC (ACv) is considered as the emotional part (Bush, Luu et al. 2000), The ACd is a ‘central station’ processing both top-down and bottom-up stimuli because of its complex connection with prefrontal cortex (PFC), parietal cortex as well as motor system. The ACv is connected with the amygdala, nucleus accumbens, hypothalamus, and is involved in processing emotional and motivational information. Clinically, ACC is implicated in a number of psychiatric conditions (e.g., dementia like Alzheimer’s disease, schizophrenia, autism, anxiety
This part aligns itself more closely with reason, for when the appetites of a person become overpowering, the psyche enlists the help of the spirit, which, Plato claims, will “keep on till it is victorious, not ceasing from noble actions until it either wins, dies, or calms down, called to heel by the reason within him” (440d). In a similar way, the triune brain proposed by MacLean contains the mammalian brain, or the “limbic system,” whose structures are said to have arisen during early mammalian evolution. The limbic system is responsible for the emotion and motivation involved in functions such as childrearing, consumption, and reproduction. It is what compels a person to react to his surroundings, usually by inhibiting the R-complex and working in accordance with the neocortex (Caine). From this, it is fairly evident the parallel one can draw between the spirited part of the soul and the limbic system of the brain, as both involve emotion and the balance between reason and
“In 2002 James Blair of the NIMH showed that they are not good at detecting emotions, especially fear, in another person’s voice. They also have trouble identifying fearful facial expressions” (Kiehl and Buckholtz 25). The paralimbic system is contain several interconnected brain regions that allow one’s brain can record feelings and sensations of others to help he or she recognize that emotional values. The regions are anterior cingulate, orbitofrontal cortex, amygdala, posterior cingulate, insula, and temporal pole. These regions help to control one’s behavior. For example, In the Anterior cingulate regions, it provides empathy, affect, decision making, and cognitive control. People who their brain are damaged in the orbitofrontal cortex wouldn’t have the ability to
For more than 26 years in neuroscience, Dr. Antonio Alcalá Malave has investigated the relationship of his patients with their emotions, which resulted in a tremendous affinity between diseases and distant memories of their ancestors. This discovery led to the book "The genetics of emotion: The origin of the disease," postulated that expressed from a scientific view that our body is genetically
The importance of the amygdala in social cognitions has been examined in both primate and human studies. Use of primates to study the social brain suggests that the amygdala contributes to social cognition. Kluver and Bucy made large bilateral lesions in monkey brains made across the amygdala, temporal neocortex, and surrounding structure. After the lesion, the animals engaged in hypersexual behaviors, unusual tameness, and a lack of knowledge about emotional stimuli. Lesions exclusively targeting the monkey’s amygdala resulted in similar, but more subtle impairments. This suggest that the amygdala may play a role in emotions elicited by social cues. Studies of the amygdala’s role in human social cognition suggest that the temporal lobes process socially relevant facial information from humans. Emotions from facial expressions, in particular fear are projected to the amygdala. Studies using FMRI to examine typical subjects and subjects with amygdala damage support this theory. Individuals with amygdala damage have difficulty recognizing facial expressions, specifically negative emotions such as fear.
Gory video games and vicious films may have a great impact on the appearance of violence in society, but they are not the sole causes. Over time, multiple biological explanations have been unearthed as well. The most common discovery is a mutation in the prefrontal cortex, which is located in the frontal lobe of the brain. When fully developed, the frontal lobe is used to make carefully thought out decisions before taking action. An alteration in the prefrontal cortex may make us susceptible to impulsive and rash behaviors. For example, teens tend to be more reckless than adults as a result of the premature frontal lobe. Teens also rely on their amygdala to make decisions, which may result in violent actions as well. The amygdala is the center
An amygdala is at its very essence linked to the sentiment of anxiety or fear. Its function is more broadly defined to the genre of emotions only because anxiety or fear can manifest themselves in far more colors than their prototypes are limited to; fear can make an individual lash out, a behavioral mechanism that is typically comprehended as anger, and anxiety can cause a person to break down or cry, and society would perceive this as depression. Most emotions are interconnected, and no matter the emotion one feels they are experiencing with respect to a particular hurdle in their life, those emotions are an incarnation of either fear or anxiety, which in turn are born to the human brain’s amygdala. An individual can call something their
For instance, in one study where the brain functioning of 41 murderers were evaluated, researchers found that the amygdala had weaker activity in the left hemisphere of their brain than they did on their right. “In other words, poor functioning in some areas indicates an inability to learn from experience, as well as an emotional load that outweighs the ability of the left hemisphere to regulate it” (Ramsland, K.M., 2005, p. 70). Damage to this area of the brain can obviously create behavioral manifestations as well, including anger, rage, and inability to react properly to the surrounding environment. Also, in other research noted by Berry-Dee (2007), the limbic system can either reward or punish the brain and if areas of the limbic system are damaged, such as the amygdala itself, and these individuals can also exhibit indiscriminate sexual behaviors. I think the biggest piece of information I gained from this week’ topic is that a variety of responses can come from injury to the amygdala, and given its ability to disrupt recognition of certain emotional behaviors, there is certainly a concern that individuals can either be a danger to themselves (by not being able to detect danger or emotions of others in their environment) or by being a danger to others (as is the case with the findings associated with amygdala dysfunctions in serial
The idea that distinct brain regions are involved in emotion and cognition has been widely supported for a long time. Subcortical regions of the brain such as the amygdala (LeDoux, 2000; Lesvesque et al., 2003) and the limbic system (Olds & Milner, 1954) are thought of as primarily emotional brain areas. Thus, the activation of these subcortical structures signals the processing of an emotional stimulus (Lesvesque et al., 2003). On the other hand, certain cortical brain regions are identified as primarily cognitive areas such as the dorsolateral prefrontal cortex (dlPFC) (Goldman-Rakic, 1996) and the activation of these cortical structures indicates the occurrence of cognitive processing (Mansouri, Tanaka & Buckley, 2009). The functional