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[–] elphantasmo 0 points 1 point (+1|-0) ago  (edited ago)

so they actually have larger frontal cortex than humans? i thought the argument was their impulsiveness and poor decision making was due to a poorly developed frontal cortex? or is size not the indicator of function?

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[–] VicariousJambi [S] ago 

I actually had to look this up too to verify as I did not know much about the parts of the brain. The Orbitofrontal cortex is just the small bottom part of the frontal lobe. All of the sub categories they talk about have to do with memory, decision making, etc. I don't think they did the frontal lobe overall, just different specific parts of it and then overall brain mass.

https://en.wikipedia.org/wiki/Amygdala

The amygdala (/əˈmɪɡdələ/; plural: amygdalae; also corpus amygdaloideum; Latin from Greek, ἀμυγδαλή, amygdalē, 'Almond', 'tonsil'[1]) is one of two almond-shaped clusters of nuclei located deep and medially within the temporal lobes of the brain in complex vertebrates, including humans.[2] Shown in research to perform a primary role in the processing of memory, decision-making and emotional responses (including fear, anxiety, and aggression), the amygdalae are considered part of the limbic system.[3]


https://en.wikipedia.org/wiki/Caudate_nucleus

The caudate nucleus is one of the structures that make up the corpus striatum, which is a component of the basal ganglia.[1] While the caudate nucleus has long been associated with motor processes due to its role in Parkinson's disease,[2][clarification needed][3] it plays important roles in various other nonmotor functions as well, including procedural learning,[4] associative learning[5] and inhibitory control of action, [6] among other functions. The caudate is also one of the brain structures which compose the reward system and functions as part of the cortico–basal ganglia–thalamic loop.[1]


https://en.wikipedia.org/wiki/Hippocampus

The hippocampus (from the Greek ἱππόκαμπος, "seahorse") is a major component of the brain of humans and other vertebrates. Humans and other mammals have two hippocampi, one in each side of the brain. The hippocampus is part of the limbic system, and plays important roles in the consolidation of information from short-term memory to long-term memory, and in spatial memory that enables navigation. The hippocampus is located under the cerebral cortex in the allocortex,[1][2][3] and in primates it is in the medial temporal lobe. It contains two main interlocking parts: the hippocampus proper (also called Ammon's horn)[4] and the dentate gyrus.


https://en.wikipedia.org/wiki/Orbitofrontal_cortex

The orbitofrontal cortex (OFC) is a prefrontal cortex region in the frontal lobes of the brain which is involved in the cognitive process of decision-making. In non-human primates it consists of the association cortex areas Brodmann area 11, 12 and 13; in humans it consists of Brodmann area 10, 11 and 47.[1]

The OFC is considered anatomically synonymous with the ventromedial prefrontal cortex.[2] Therefore, the region is distinguished due to the distinct neural connections and the distinct functions it performs.[3] It is defined as the part of the prefrontal cortex that receives projections from the medial dorsal nucleus of the thalamus, and is thought to represent emotion and reward in decision making.[4] It gets its name from its position immediately above the orbits in which the eyes are located. Considerable individual variability has been found in the OFC of humans.[5] A related area is found in rodents.[6]