The Complex Structures Of The Limbic System

23.The part of the limbic system located in the center of the brain, this structure relays sensory information from the lower part of the brain to the proper areas of the cortex and PROCESSES some sensory information before sending it to its proper area and is called the thalamus.

During brain development, beginning in the womb into adulthood, all of these cells must be grouped and organized into specific networks, which create the architecture of the brain (Perry & Szalavitz, 2006). The brainstem, the diencephalon, the cortex and the limbic system are the four major parts of the brain. The brain is organized from the inside out, thus, “the lower and most central regions of the brainstem and diencephalon are the simplest” (Perry & Szalavitz, 2006, p. 21) and are also the first to form, therefore, developing first as the child grows and develops (Perry & Szalavitz, 2006). As the brain develops upward and outward, the limbic system becomes more complex and the cortex is the crowning achievement of the brain structure (Perry & Szalavitz, 2006). These four areas of the brain are organized from top to bottom and inside to outside, although these four areas are interconnected, each one controls different functions such as the brainstem controls body temperature, heart rate and blood pressure, as well as respiration. The limbic system and diencephalon control emotional responses that help to guide one’s behavior such as fear, love, joy and anger. The cortex, the top part of the brain, regulates the complex and high functions such as speech, critical thinking, and decision-making (Perry & Szalavitz, 2006). The

To coordinate with our current chapter on emotions, our class watched the film Inside Out. The story was about the emotions, Joy, Sadness, Anger, Fear, and Disgust, controlling a goofy, honest, and caring 11 year old named Riley. Inside her brain, the emotions used controls to decide the way Riley feels. The part of the brain the “control center” in Inside Out represented was the Limbic System. I know this because during in our Body and Mind unit, the part of the brain we most associated with mood and emotions was this system. It is best defined as a complex system of nerves and networks in the brain, including areas concerned with instinct and mood. The Limbic System’s main control is emotions and drives feelings, which was the main purpose of the emotions “control center.”

The limbic system (or Paleomammalian brain) is a set of brain structures including the hippocampus, amygdala, anterior thalamic nuclei, and limbic cortex, which support a variety of functions including emotion, behavior, long term memory, and olfaction.[1] The term "limbic" comes from Latin limbus, loosely translating as "border" or "belt".

The brain can be considered the most complex organ in the body and the centrepiece of the nervous system. Although the brain works as a unified whole, neuroscientists have identified areas within it that perform specific functions. This makes the brain interconnected by three different layers: the central core, the limbic system, and the cerebral cortex. All of which contain structures that regulate everyday life and psychological function.

These psychological disorders originate from different area of the brain. The brain consists of three main parts: the forebrain, midbrain, and hindbrain. The forebrain is made up of the cerebrum, thalamus, and hypothalamus (part of the limbic system). The midbrain comprises the tectum and tegmentum. The hindbrain consists of the cerebellum, pons and medulla. The midbrain, pons, and medulla in conjunction are typically called the brainstem.

2. The limbic system also includes the amygdala(Amig- Dalah) which is the part of the brain responsible for emotions. In an Article called Scientists Discover Why Dreams Are So Weird they state “During REM sleep, the men's brains showed the most activity in the limbic system, a primitive part of the brain that governs emotion. Meanwhile, little activity was seen in the frontal lobes. The frontal lobes help sort out and give meaning to information from the senses. According to the researchers, this unequal activity might explain why dreams can be so intense, yet so illogical. It may also explain why dreams do not seem strange to the dreamer while they are happening” (Scientists Discover Why Dreams Are So Weird).

1. Radiation heat loss through electromagnetic waves (temp of skin is higher than the air, the skin loses heat to the air).

The amygdala specializes in threat detection, fear, excitement, and arousal, hippocampus helps format long-term declarative memories and spatial reasoning. The anterior cingulate cortex influences autonomic function, decision making, error detection and emotion while the posterior has a role in spatial annotations memory. The septal area produces pleasurable feeling,

In addition, the limbic system is responsible for our perception of other emotions, both positive and negative, which explains the mood altering properties of many drugs. The cerebral cortex is divided into areas that control specific functions. Different areas process information from our senses, enabling us to see, feel, hear, and taste. The front part of the cortex, the frontal cortex or forebrain, is the thinking center of the brain, it powers our ability to think, plan, solve problems, and make decisions.

The hypothalamus controls several main bodily functions including: “hunger, thirst, sexual motivation, body temperature and a variety of other emotions” (pg. 100). A prime example of how the hypothalamus would be active during my night with my friends would be eating pizza. The hypothalamus would trigger me to know I was hungry and tell me that I was enjoying the pizza. It would also play a major role in any emotions my friends or I experience throughout the night, like if I had a friend experiencing a break up, making her feel distraught or sad.

Emotion and memory are actually very closely related. Thus, it is not surprising that the hippocampus is located in the limbic system, which is the emotion system portion of the brain. The limbic system is mainly associated with memory, motivation, and emotions (Memory). The hippocampus itself is located within the temporal lobes, right next to the amygdala. The structure is a horseshoe shaped paired brain structure, where one half of it is located in the left brain hemisphere, while the other half is in the right brain hemisphere (Robson).

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).

The hypothalamus transmits nerve impulses that go through brain stem, spinal cord, and preganglionic sympathetic nerve fibers to adrenal medulla, then will

The brain is dividing into several sections, including the cerebellum, the frontal lobe, and the temporal lobe, among others. The temporal lobe exists in two parts, one on each side of the brain close to the ears. It is largely responsible for the memory system (2). On the medial surface of the temporal lobe there are three important structure that are essential for human functioning. These structures are named, in order from rostral to caudal, the olfactory cortex, the amygdala, and the hippocampus. Together these three structures are referred to as the "limbic system" (1). Their functions became understood after studying how the brain functions upon loss of each structure. For example, in 1953, a patient suffering from epilepsy underwent surgery which removed most of his medial temporal lobe (1). After the surgery, the patient was able to remember who he was and was able to carry out coherent, intelligent conversations. However, if the person with whom he was talking left the room, he would have no