{"id":1735,"date":"2016-10-27T06:14:55","date_gmt":"2016-10-27T06:14:55","guid":{"rendered":"http:\/\/101psych.com\/?p=1735"},"modified":"2016-10-27T06:14:55","modified_gmt":"2016-10-27T06:14:55","slug":"the-frontal-lobe-and-the-prefrontal-cortex","status":"publish","type":"post","link":"https:\/\/www.themantic-education.com\/ibpsych\/2016\/10\/27\/the-frontal-lobe-and-the-prefrontal-cortex\/","title":{"rendered":"The Frontal Lobe and the Prefrontal Cortex"},"content":{"rendered":"

Numerous studies have shown that there are correlations found between brain function (or dysfunction) and behaviour. In order to fully understand these studies, it\u2019s important to have a general understanding of some of the functions of important parts of the brain.<\/p>\n

The frontal lobe is an important part of the brain to understand.\u00a0One important function of the frontal lobe<\/strong> is to regulate our impulsive decision making.<\/p>\n

\"brain_-_14600401142\"

Here we can see how the brain has different “lobes”. In this course we will learn a lot about the frontal and prefrontal area (above the forehead).<\/p><\/div>\n

The prefrontal cortex (PFC)<\/strong> is an area of the frontal lobe that is located above the eyebrows. The prefrontal cortex <\/strong>is the area at the very front of the frontal lobe; it\u2019s the area of the brain just above the eyebrows beneath the forehead. The cortex refers to the dense outer layer of the brain where most of the brain\u2019s neurons are; this area is also called grey matter<\/strong>.<\/p>\n

One of the functions of the PFC\u00a0is that it facilitates our decision making in the sense that it allows us to foresee and imagine possible implications for our actions. When the PFC\u00a0is functioning normally it kind of acts like a \u201cbreak\u201d on our impulsive behaviour. So when you get really angry at your teacher and you want to curse but don\u2019t because you know that it will get you in trouble, you have your frontal lobe to thank. Or if you\u2019re walking down the street and you see a pretty person and you think, \u201cwow! They\u2019re hot!\u201d and you keep that thought to yourself \u2013 you have your frontal lobe to thank. The impulsivity of young children can be explained through their still-developing frontal lobes.<\/p>\n

\"prefrontal1\"

Here you can see that within the frontal lobe is the prefrontal cortex and within the cortex there are further sub-regions, like the ventrolateral PFC and the orbitofrontal PFC.<\/p><\/div>\n

When learning about the brain, it\u2019s always important to remember that brain function is complex and to avoid the allure of simplifying down to claims like \u201cour frontal lobes control<\/em> our behaviour.\u201d Human behaviour is far too complex, as is the brain, for both to be boiled down to such a simple statement. A more accurate statement would be \u201cour frontal lobes are associated with<\/em> self-control.\u201d The phrase \u201cassociated with\u201d is a useful one when discussing the brain because it suggests a correlation between brain function and behaviour without oversimplifying the relationship.<\/p><\/blockquote>\n

Phineas Gage<\/strong><\/p>\n

How do we know what we know in psychology? Research.<\/p>\n

One of the first and most famous studies of a man who had severe damage to his frontal lobe was that of Phineas Gage. Gage was a railroad worker who was putting dynamite into rocks while working with a team to lay tracks. As he used a six-foot bar to pound the dynamite powder into the rocks it ignited, essentially making the long steel pole a bullet that fired up through his left eye, through his skull and landed about 50ft away. Gage survived and was even conscious while he rode on the ox cart to the nearest town to get help. As a result of the incident, Gage\u2019s behaviour seemed to change as he went from being a rather mild-mannered man to \u201cno longer Gage\u201d as his friends said. Reports have even said that he was no longer allowed to be around women because he would often say rude things to them. This was in 1948 and Harlow, the Doctor who treated Gage, made a few observations about the change in Gage\u2019s behaviour that has made him one of the first and most famous cases that links brain damage to personality change.<\/p>\n

\"simulated_connectivity_damage_of_phineas_gage_skulldisplaywarren\"

Gage’s skull. You can see the whole in the skull where the metal rod went through. image from wikipedia.<\/p><\/div>\n

I\u2019m only using Phineas Gage here as a pretty dramatic and gruesome example of how frontal lobe damage may influence our behaviour and our ability to regulate our impulsive desires; he is one of the first case studies in neuroscience. Since Gage there has been a lot more research into the frontal lobe, the area within the frontal lobe called the prefrontal cortex and their connection with regulating our impulsive decision making and our emotion. We\u2019ll now look at some of these more recent findings.<\/p>\n

With modern imaging technology (MRI\u2019s, fMRI\u2019s, PETs, etc.) researchers can investigate further connections between brain function and behaviour. You can read more about how and why these brain imaging machines are used later in this chapter.<\/p>\n

Time and again research has shown that there are common brain functioning and activity differences in criminals when compared with healthy and normal controls. When researching these correlates, it\u2019s important to remember their general function, but not to oversimplify the biological processes underpinning human behaviour.<\/p>\n

Studies have shown that there is a correlation between low functioning frontal lobes and violent behaviour. You can do a quick google search under scholarly articles for yourself and see just how many studies are in this area. In fact, this is precisely what Brower and Price did in 2000: they wrote the journal article \u201cNeuropsychiatry of frontal lobe dysfunction in violent and criminal behaviour: a critical review\u201d<\/a> in which they summarise studies between 1966 \u2013 2000. This would be good optional extra reading.<\/p>\n

\n

Here’s an excerpt from Sapolsky’s lecture on the frontal lobe and the brain.<\/p>\n[youtube https:\/\/www.youtube.com\/watch?v=t3_nHnhdxPs]\n","protected":false},"excerpt":{"rendered":"

Numerous studies have shown that there are correlations found between brain function (or dysfunction) and behaviour. In order to fully understand these studies, it\u2019s important to have a general understanding of some of the functions of important parts of the brain. The frontal lobe is an important part of the brain to understand.\u00a0One important function of the frontal lobe is … <\/p>\n

Read More<\/a><\/div>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rs_blank_template":"","rs_page_bg_color":"","slide_template_v7":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-1735","post","type-post","status-publish","format-standard","hentry","category-biological-psychology","no-post-thumbnail"],"yoast_head":"\nThe Frontal Lobe and the Prefrontal Cortex | The IB Psychology Blog<\/title>\n<meta name=\"description\" content=\"Discover the correlations between brain function and behavior in this comprehensive guide. 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In order to fully understand these studies, it\u2019s important to have a general understanding of some of the functions of these parts\u2026","rel":"","context":"In "Biological Psychology"","block_context":{"text":"Biological Psychology","link":"https:\/\/www.themantic-education.com\/ibpsych\/category\/biological-psychology\/"},"img":{"alt_text":"brain_-_14600401142","src":"https:\/\/101psychcom.files.wordpress.com\/2016\/10\/brain_-_14600401142.gif?w=350&h=200&crop=1","width":350,"height":200},"classes":[]},{"id":1751,"url":"https:\/\/www.themantic-education.com\/ibpsych\/2016\/10\/27\/key-study-moral-judgement-and-the-prefrontal-cortex-ciaramelli-et-al\/","url_meta":{"origin":1735,"position":2},"title":"Key Study: Moral judgement and the prefrontal cortex (Ciaramelli, et al)","author":"Travis Dixon","date":"10\/27\/2016","format":false,"excerpt":"This study helps to explain\u00a0how\u00a0dysfunction in the prefrontal cortex might make people more susceptible to violent and\/or impulsive behaviours. Similar to the VHIS, Ciaramelli et al investigated the differences between moral judgements in people with damage to their prefrontal cortex and healthy controls. Their study cites existing research that suggests\u2026","rel":"","context":"In "Biological Psychology"","block_context":{"text":"Biological Psychology","link":"https:\/\/www.themantic-education.com\/ibpsych\/category\/biological-psychology\/"},"img":{"alt_text":"prefrontal1","src":"https:\/\/101psychcom.files.wordpress.com\/2016\/10\/prefrontal1.png?w=350&h=200&crop=1","width":350,"height":200},"classes":[]},{"id":772,"url":"https:\/\/www.themantic-education.com\/ibpsych\/2016\/10\/04\/key-study-brain-damage-and-violence-graftman-et-al-1996\/","url_meta":{"origin":1735,"position":3},"title":"Key Study: Brain Damage and Violence (Grafman, et al 1996)","author":"Travis Dixon","date":"10\/04\/2016","format":false,"excerpt":"Updated May, 2020 The Vietnam Head Injury Study (VHIS) is a longitudinal that gathers and analyzes data from Vietnam war veterans. 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Research!\u00a0 Throughout this course and in almost every lesson you're going to be asked to answer questions, such as*: How do levels of serotonin influence behaviour? What causes depression? Can we trust our memory? In answering all of these questions you\u2026","rel":"","context":"In "Assessment (IB)"","block_context":{"text":"Assessment (IB)","link":"https:\/\/www.themantic-education.com\/ibpsych\/category\/assessment-ib\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.themantic-education.com\/ibpsych\/wp-json\/wp\/v2\/posts\/1735","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.themantic-education.com\/ibpsych\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.themantic-education.com\/ibpsych\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.themantic-education.com\/ibpsych\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.themantic-education.com\/ibpsych\/wp-json\/wp\/v2\/comments?post=1735"}],"version-history":[{"count":0,"href":"https:\/\/www.themantic-education.com\/ibpsych\/wp-json\/wp\/v2\/posts\/1735\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.themantic-education.com\/ibpsych\/wp-json\/wp\/v2\/media?parent=1735"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.themantic-education.com\/ibpsych\/wp-json\/wp\/v2\/categories?post=1735"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.themantic-education.com\/ibpsych\/wp-json\/wp\/v2\/tags?post=1735"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}