Preview

Hormones In The Brain

Good Essays
Open Document
Open Document
1747 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Hormones In The Brain
When Lara is walking toward the dorm after a long day of classes she begins to feel hungry. The subcortical structure in the brain that regulates hunger is the hypothalamus. The hypothalamus is located in the prosencephalon of the brain in the sub cortex referred to as the diencephalon (Rouse, 2015). Hypothalamus’ main job is to maintain homeostasis in the body (Rouse, 2015). Hormones from the hypothalamus aides to regulate functions in the body, some including: hunger, body temperature, thirst, metabolism, mood etc. (Rouse, 2015). Hormones in the body are chemical signals which allow different cells and structures of the body to communicate. (Mader & Windelspecht, 2012) The hormone that communicates with hypothalamus to tell the brain we …show more content…
Alison sees Lara and cannot fully understand what she was saying because of the competing noise. Alison uses the same visual pathway that Lara did that was previously explained. However, the primary visual cortex is not the only part of the brain that processes what Alison is seeing. There are surrounding areas that also process visual information once it reaches the primary visual cortex. Areas 1&2 process orientation, spatial frequency and color. Area three integrates information that you are receiving. Area four is vital for object recognition and color perception. Area five is important for motion …show more content…
The direct motor pathway is also referred to as the pyramidal system. The pyramidal tracts controls voluntary gross motor movement. The pyramidal tract is made up of two tracts, the corticospinal tract and the corticonuclear tract (Rouse, 2015). The tracts are significant for motor movements, as well as, motor movements required for speech. The corticospinal tract originates in the cortex and travels past the pyramids located in the medulla to innervate spinal nerves through the spinal cord. The cotricospinal tract controls movement of the limbs (Rouse, 2015).The corticonuclear tract also originated in the cortex and travels past the pyramids located in the medulla to innervate the cranial nerves. The corticonuclear tract controls fine motor movements and controls the movement of the speech mechanisms. The corticonuclear tract is the most important tract for speech and swallowing (Rouse,

You May Also Find These Documents Helpful

  • Satisfactory Essays

    Aggression is a behavior directed towards another intended to harm or injure. Neurotransmitters are chemicals that enable impulses in the brain to be transmitted from one area of the brain to another. There’s evidence that the neurotransmitters serotonin and dopamine are closely linked to aggressive behavior. Low levels of serotonin and high levels of dopamine have been associated with aggression in both animals and humans.…

    • 605 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Essay On Hypothalamus

    • 573 Words
    • 3 Pages

    In vertebrates, the hypothalamus, located at the base if the brain, plays a central role in integrating the endocrine and nervous systems. The hypothalamus receives information from nerves throughout the body and the brain. (Mousa and Mousa, 2003) In response, the hypothalamus initiates endocrine signalling appropriate to environmental conditions. In many vertebrates’ nerve signals from the brain pass information to the hypothalamus about seasonal changes, therefore the hypothalamus regulates the release of reproductive hormones, which are required during breeding seasons. (Campbell and Reece, 2011) The hypothalamus signals travel to the pituitary gland, which is located at the base of the hypothalamus with posterior and anterior parts. The anterior pituitary is an endocrine gland that synthesises and…

    • 573 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Ghrelin Case

    • 566 Words
    • 3 Pages

    Some other functions that ghrelin has shown to have include; growth hormone release, glucose metabolism, gastric acid secretion, gastrointestinal motility, peripheral signalling & feeding behaviour. Since it promotes fat storage ghrelin has a role in body weight regulation which appears to be more complex than initially proposed. Ghrelin also protective effects on the cardiovascular system as well as playing a role in the control of insulin release. The regulation of the complex process of energy homeostasis is but another of ghrelin’s functions or roles in the body. It also reduces the mechanosensitivity of gastric vagal afferents making them less sensitive to gastric distension as well as improving endothelial function & inhibiting proatherogenic changes in cell cultures while also being an adiposity signal. Ghrelin’s important for neurotrophy, which is the brain’s ability to adapt to new environments & learn new processes. It enters the hippocampus from the bloodstream & alters the connections between nerves & cells to enhance learning & memory. It’s also been shown to act on regions of the brain associated with reward processing such as the amygdala but it’s also been shown to increase the concentration of dopamine in the substantia nigra through its receptors. Ghrelin has a role in the motivated reward-driven behaviours via the activation of the…

    • 566 Words
    • 3 Pages
    Good Essays
  • Good Essays

    1. The body is regulated by homeostatic mechanisms; concerning food intake this is dependent on glucose levels. Decrease in glucose levels means hunger levels increase, whereas an increase in glucose levels means satiation is reached.…

    • 925 Words
    • 4 Pages
    Good Essays
  • Better Essays

    An example of the physiological counterpart to psychological need is the hypothesized hypothalamic control of sensations of hunger and satiety. The research entailing lesions in rates the hypothalamus controls the sensations of hunger and satiety through exercising control of adipose tissues deposited in the body.…

    • 749 Words
    • 3 Pages
    Better Essays
  • Good Essays

    Studies that have mapped the connections between neurons in the brain, gain insight into the regulation of appetite and metabolism. The ARC and VMH has long been thought of as satiety centers. Studies that investigate the role of the arcuate nucleus in the hypothalamus, in regulating appetite and metabolism, have targeted two chemically identified neuronal types within the ARC: anorexigenic pro-opiomelanocortin (POMC) neurons and orexigenic neuropeptide Y (NPY)/agouti-related peptide (AgRP) neurons. The melanocortin α-melanocyte stimulating hormone (α-MSH, a biologically active peptide produced in POMC neurons) serves as an agonist, whereas AgRP is an inverse agonist at the anorectic melanocortin receptors (MC3R and MC4R) in the central nervous system. NPY elicits its physiological effects via differential activity at the G-protein coupled NPY receptors (NPY1R, NPY2R, NPY4R, and NPY5R) independent of melanocortin receptors [11]. Notably, although there are only a few thousand POMC and NPY/AgRP neurons within the arcuate nucleus [7], α-MSH and NPY/AgRP released from these neurons have potent effects on food intake and metabolism, respectively.…

    • 601 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    Neurons Vs Hormones

    • 71 Words
    • 1 Page

    Neurons Hormones Speed: 268 mph (at least 250 mph) fast response. Speed: slow acting – minutes, days to take effect. Duration/length: short response – effect only lasts seconds. Duration/length: long lasting response – effect can last minutes, days, months.…

    • 71 Words
    • 1 Page
    Satisfactory Essays
  • Good Essays

    The Five Hormone

    • 268 Words
    • 2 Pages

    The five hormone's that play a role in regulation of glucose metabolism are Insulin, Glucagon, Epinephrine, norepinephrine, and cortisol. Insulin is located in the pancreas and the action of insulin is remarkable and also not as complex as most people would think. Glucose is taken up by a muscle that is at rest, which in turn regulates blood glucose concentration. This process isn't difficult to understand because it isn't as many parts to the process. Glucagon also finds itself located in the pancreas along side insulin. The action of glucagon is that it causes glycogen to be broken down and that results in glucose being released into the blood, which also is a complex situation that is not hard to understand due to it not having many steps.…

    • 268 Words
    • 2 Pages
    Good Essays
  • Good Essays

    A hormone is a biochemical produced by the glands of the endocrine system which is transported by the bloodstream to specific cells and organs around the body in order to initiate specific biological responses. The human body can produce a large number of hormones, many of which have a large influence on our emotions and behavior. Common examples are adrenaline, oxytocin, oestrogen, and testosterone, which I will be using to demonstrate the vast influence which hormones have over our everyday lives.…

    • 320 Words
    • 2 Pages
    Good Essays
  • Best Essays

    Neurons found in the orbitofrontal cortex of the brain’s limbic system are the first to be stimulated and respond to sensory signals that are generated in the presence of food[1]. It is here that the sensory inputs produced by food interact with hunger/satiety signals, allowing us to decipher how pleasant the food is and whether or not we have an appetite for it. It is proposed that hypothalamic neurons (that respond to hunger/satiety signals) send connections to the orbitofrontal cortex to inform it of these signals. It is also suggested that…

    • 3209 Words
    • 13 Pages
    Best Essays
  • Satisfactory Essays

    hunger signal

    • 318 Words
    • 1 Page

    When our bodies need nourishment to function properly neurotransmitters are released, Neuropeptide Y (NPY) has been noted by scientists as an important neurotransmitter involved in sending messages to and from different parts of the brain. Furthermore, scientists have identified two chemicals Ghrelin and Leptin that communicate with NPY and are involved in hunger signalling.…

    • 318 Words
    • 1 Page
    Satisfactory Essays
  • Powerful Essays

    The hormone ghrelin is produced by the stomach and the hypothalamus. Hormonal levels of ghrelin have been shown to increase before meals and decrease after. Ghrelin was the first discovered hunger hormone. The hypothalamus has receptors for ghrelin, which signals the body of hunger. Ghrelin has also been associated with certain aspects of certain addictive drugs, alcohol, and is associated with food cravings as a reward.…

    • 7133 Words
    • 29 Pages
    Powerful Essays
  • Good Essays

    Hunger Motivation

    • 996 Words
    • 3 Pages

    Hunger is one of the three most significant motivators a person experiences. It is a major concept in our everyday lives that influences behaviours we gravitate to ourselves. What drives this motivator? What are the mechanics and processes involved with feelings of hunger and fullness? For a better understanding starting from the biological aspects that soon combine with social aspects will develop a thorough sense of how hunger operates. A reliable process to accurately indicate true hunger is by the use of the blood glucose level. Levels are monitored through glucoreceptor cells in the brain and liver, of which we are not aware of our levels and is a good thing. It is not an ideal behaviour to constantly think about your blood glucose level every day of every minute. In addition to monitoring our glucose levels, the brain also monitors other factors such as hormone levels that operate the hunger mechanics. There are four hormones associated with hunger: cholecystokinin, leptin, glucocorticoids, and ghrelin. Cholecystokinin and leptin reduce the appetite when its levels are increased. In contrast, glucocorticoids and ghrelin enhance the appetite when increased in the body. A special tool of the brain is used in detecting the levels of the hormones to initiate the feeling of hunger or fullness. This tool is called the hypothalamus which used key areas to function the hunger mechanic. It also interacts with another part of the brain called the hippocampus in the experience of hunger and fullness. The lateral hypothalamus when stimulated will increase appetite but reduce it if it has sustained damage. The ventro-medial hypothalamus operates in the opposite way as it reduces appetite if stimulated but increases it if damaged. Specific types of hunger or “cravings” as one would call it are controlled by the paraventricular nucleus part of the hypothalamus. With this information, could we not develop ways to mold people’s appetites and over eating? Some would…

    • 996 Words
    • 3 Pages
    Good Essays
  • Powerful Essays

    Homo Aquaticus?

    • 2044 Words
    • 9 Pages

    In humans Area 4 is almost twice as large as it is in chimpanzees. The…

    • 2044 Words
    • 9 Pages
    Powerful Essays
  • Good Essays

    my father goes to court

    • 396 Words
    • 2 Pages

    The hypothalamus receives information from many sources about the basic functions of your body. It uses the information it receives to help regulate these functions. One of the ways the hypothalamus does this involves controlling the pituitary gland. The hypothalamus does this by using its own hormones to communicate with the pituitary.…

    • 396 Words
    • 2 Pages
    Good Essays