Preview

Second Eye

Powerful Essays
Open Document
Open Document
1532 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Second Eye
TITLE
PINEAL GLAND: “THE HIDDEN EYE”

INTRODUCTION

The third eye, also referred as parietal eye or pineal eye, is a photosensory organ that triggers hormone production and thermoregulation. This eye cannot see in quite the same way as the main eyes, instead only detecting shapes and shadows rather than full pictures. They are also highly sensitive to changes in light and dark – producing markedly different hormones based on time of day. It produces melatonin, a hormone that affects the modulation of sleep/wake patterns and photoperiodic (seasonal) functions. It also contributes to the sexual development of a person. Its location on the near or center of the two hemispheres of the brain takes into a lead that it’s the link of physical and
…show more content…
This pine cone-shaped gland is derived from the evagination of the diencephalon roof. Topographically, the pineal gland occupies the impression between the superior colliculi of the mesencephalon and is burrowed between the two hemispheres of the brain. This gland can produce hormones that are focused for neurological regulation such as the serotonin and its derivative melatonin, which encodes and disseminates information on circadian rhythm, thus coupling the outside world to the biochemical and physiological internal demands of the …show more content…
(Miller, 1985) The pineal gland was then considered as the “mind’s eye” because of its involvement in the activity of the eye in making the person feel sleepiness and the ability of photoreception even though it does not receive direct light to form images (occurs especially when a person is dreaming due to synthesis of DMT hormone in-charge of it). By this, the pineal gland has then the biological potential of being an actual

You May Also Find These Documents Helpful

  • Good Essays

    At night, when there is no light, the SCN then sends a message to the pineal gland, causing it to increase the production of melatonin, which induces sleep by preventing the brains mechanism to promote wakefulness.…

    • 753 Words
    • 4 Pages
    Good 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
  • Better Essays

    The endogenous pacemaker that works as an internal body clock to regulate biological rhythms of the sleep-waking cycle is the suprachiasmatic nucleus (SCN, a small group of cells in the hypothalamus). The SCN has a direct pathway to the retina of the eye, in which light enters. Light is an exogenous zeitgeber which also has an influence on the rhythm due to being synchronised with the SCN. The SCN is also connected to the pineal gland by a neural pathway; the pineal gland is where the hormone melatonin is manufactured. Melatonin affects sleep patterns, the more melatonin released due to low levels of light the more sleep, when melatonin levels drop due to high levels of light the individual wakes. However, sleep/wake cycles can be maintained in the absence of light as the SCN is free-running, it follows its own innate rhythm and continues to follow a pattern of circadian activity even when isolated from the rest of the brain.…

    • 1438 Words
    • 6 Pages
    Better Essays
  • Good Essays

    Wedjat Eye

    • 666 Words
    • 3 Pages

    On a trip to the Johns Hopkins Archaeological Museum I got to experience seeing a wide variety of objects from Ancient Egypt. However, one object in particular stood out to me: Wedjat Eyes. This particular Wedjat Eye is also known as the Eye of Horus. The museum had several on display—representing its popularity. The one I decided to study was a pale turquoise color that was made from Egyptian faience from Thebes, Egypt which was dated between the 21st-26th Dynasty, ca 1069-525 BCE (Accession number: 3685). This object was very detailed in respect to the eyebrow and lines and was roughly 2-2.5 centimeters across. There seemed to be some browner almost rust like color as well which defined all the lines well. The eye itself was slanted and seems to have three dots inside the pupil. There is a lot of emphasis on the eyebrow and what seems to be cosmetic decoration under the eye as well. This may be to signify a sense of royalty. The eye itself does not appear to be fully human, rather as the name suggests to have a bird-like appearance which is to represent Horus. Egyptian faience was commonly used for small objects and is consistent with the idea that this particular Wedjat Eye was part of an amulet. Egyptian faience was invented around 2500 BCE, and the blue-green…

    • 666 Words
    • 3 Pages
    Good Essays
  • Good Essays

    The suprachiasmatic nucleus (SCN) is the pacemaker of the biological clock in the sleep–wake cycle. The SCN generates its own innate biological rhythm due to protein synthesis. It is connected to the optic chiasm and so receives input about the amount of light (an exogenous or external factor), which also influences the rhythm. Therefore, light stimulates nerve impulses which travel from the eye, along the optic nerve to the brain. The pineal gland is linked to the SCN by a neural pathway and so the electrical stimulation of the SCN is transferred to the pineal gland and this causes it to release melatonin. Light and melatonin are inversely proportional, i.e. when light levels are low high amounts of melatonin are released. Melatonin is a hormone that induces sleep because it enhances production of the neurotransmitter serotonin and this causes the nervous system to slow down, brain activity consequently falls, and sleep begins. With regards to exogenous factors, light is the key external factor which…

    • 402 Words
    • 2 Pages
    Good Essays
  • Satisfactory Essays

    The way the body tells us we need to sleep is by the firing off of neurons from the suprachiasmatic nucleus in the brain. The suprachiasmatic nucleus controls the sleep/wake cycle, body temperature, urine production, hormone secretion and blood pressure changes.…

    • 515 Words
    • 3 Pages
    Satisfactory Essays
  • Satisfactory Essays

    1. Dementia is not an illness or disease in itself , but is a broad term which describes a range of signs and symptoms that occur when the brain is affected by certain disease and conditions such as Alzheimer’s disease or vascular dementia.…

    • 1133 Words
    • 5 Pages
    Satisfactory Essays
  • Powerful Essays

    Eye Dissection

    • 1568 Words
    • 7 Pages

    Before actually beginning the dissection of the cow’s eye, we were about to sketch a fairly relative picture of our observing’s of the exterior body of the eye. The eye, having almost completely being sheltered in fat and muscle, was quite firm and only the cornea and optic nerve was identified. By further cutting down the fat, we were able to spot a rather tough pinkie white outer covering of the eyeball, which we later discovered to be known as the sclera. We also noticed the blue covering over the front of the eye, known as the cornea, which became cloudy after death. Finally beginning the dissection, we made an incision in between the sclera and cornea which took much effort as it was quite tough. However once slit, a clear liquid named the aqueous humour was able to ooze out. Dissecting further, we were able to remove the lens, the iris and the pupil. The iris, suspended between the cornea and lens, came out as a rather brown coloured circle. The pupil, distinguished as the dark circle in the centre of the iris was rather quite oval. The lens was a tiny blob of white which resembled an ice capsule but however had a rather pasty soft, smooth and easily damaged texture. When splitting the eye in half, we were able to discover its rather liquid-filled chamber in which a black, jelly-like substance called the vitreous humour seeped out. Deep near the end of the inner eye with all the vitreous humour removed, was the retina. Shaped like a bowl, the light blue retina contained red blood vessels which are assumed to receive the oxygen transmitted from the blood. The eye was quite warm, considering its defrosting methods and emitted little odour which in turn suggest that its rotting stage hasn’t yet begun.…

    • 1568 Words
    • 7 Pages
    Powerful Essays
  • Good Essays

    The Pupil

    • 449 Words
    • 2 Pages

    In the passage from “the Pupil” by Henry James, the author depicts the 3 characters and their relationships toward each other in varying lights. Pemberton, Morgan Moreen and Mrs. Moreen are introduced here through dialogue and interaction with each other and the author uses a variation of tone and a unique point of view to show Pemberton’s uncertainties and also to show the characteristics of the relationships. The author starts off the passage describing Pemberton as a “poor young man”. Pemberton is a tutor who graduated from Oxford University. He is depicted as a financially concerned person who cares about how much he is getting paid for this tutoring of Morgan Moreen. But he is also modest, timid, and according to the passage nervous “among the dangers of an untried experiment”. Also the author depicts Pemberton as impatient by saying, “it is true Pemberton wouldn’t have enjoyed his being stupid”. But from the very start, Pemberton begins to analyze his pupil and tries to understand him and what ne needs to teach him. Right away Pemberton seems to connect to Morgan and Morgan to Pemberton and this is evident especially when Mrs. Morgan gets up to leave and Pemberton takes the job without a definite salary.…

    • 449 Words
    • 2 Pages
    Good Essays
  • Satisfactory Essays

    The Mesencephalon had two divisions the tectum and tegmentum. The tectum has two pairs of bumps, the colliculi. The inferior colliculi have auditory function and the superior colliculi have visual function. The tegmentum is reticular formed with tracts of passages and contains three colorful structures that biopsychologists use; grey, black, and red. These colorful sections contribute too many functions: sleep, attention, and movement, maintenance of muscle tone, cardiac, circulatory, and respiratory reflexes. The grey matter has a role in the effects of opiate drugs or pain reducers. The black and red areas are both important in the sensorimotor system.…

    • 349 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Melatonin is a natural hormone made in your body’s pineal gland, and released into your bloodstream to make you feel tired. Our bodies start making this hormone usually when it begins to get dark. During the day our bodies don’t make melatonin.…

    • 675 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Circadian Rhythm

    • 590 Words
    • 3 Pages

    The suprachiasmatic nucleus or SCN is a part of the hypothalamus and the main control center of the circadian rhythms of sleep and temperature. It is located above the opt chiasm. Any damage to the SCN results in less consistent body rhythms that are no longer synchronized to environmental patterns of light and dark. It results in the complete absence of a regular sleep-wake rhythm.…

    • 590 Words
    • 3 Pages
    Good Essays
  • Powerful Essays

    London Eye

    • 1329 Words
    • 6 Pages

    The Merlin Entertainments London Eye, commonly known as London Eye or Millennium Wheel or British Airways London Eye.…

    • 1329 Words
    • 6 Pages
    Powerful Essays
  • Powerful Essays

    Farris Bartholomew

    • 900 Words
    • 3 Pages

    Are your troubles keeping you from falling asleep at night? While for some, the answer might be as simple as a glass of warm milk or a turkey sandwich, others with atypical chemistry in a tiny part of the brain located between the thalamus, the amygdala, and the pituitary gland, might have a bit of a conundrum. Research demonstrates that sleep is important and that sleep issues should not be ignored.…

    • 900 Words
    • 3 Pages
    Powerful Essays
  • Powerful Essays

    Neurophysiology and Learning

    • 3050 Words
    • 13 Pages

    In a great attempt to uncover the many dimensions of learning, psychologists studied profusely what the mind might be capable of. Their main desire was to separate mind and body, with the hopes of understanding how these two elements complemented each other (Hergenhahn, Olson, 2005). Rene Descartes, a theorist, performed a study in the areas of physiology and neuroscience. He wanted to understand why it was that despite having two separate eyes, organisms are only able to see one object in their field of vision. Descartes believed it was the “physiological unification of the binocular stimulation in the optic chiasma” (Harftfield, 1998, p 389). It was in this study the he concluded that the stimuli found in this optic chiasma yielded to the different sides of the brain. Descartes’ research led to the study of the physiological nature of the mind and body.…

    • 3050 Words
    • 13 Pages
    Powerful Essays