{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Psych CHAPTER_5 - CHAPTER 5 LEARNING OBJECTIVES When you...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
CHAPTER 5 LEARNING OBJECTIVES When you have mastered the material in this chapter, you should be able to do the following: 1. Discuss the nature and evolution of consciousness, including its relation to brain activity. - Consciousness is the awareness of internal and external stimuli. Your consciousness includes: 1. Your awareness of external events. 2. Awareness of your internal sensations. 3. Awareness of yourself as a unique being having these experiences. -Freud argued that people’s feelings and bx are influenced by the unconscious. We now know that people continue to maintain some awareness during sleep and even anesthesia because some stimuli can still penetrate awareness. -Consciousness does not arise from any distinct structure in the brain, but is the result of activity in distributed networks of neural pathways. The electroencephalograph (EEG) is a device that monitors the electrical activity of the brain over time by means of recording electrodes attached to the surface of the scalp. Human brain wave activity is divided into 4 bands- beta, alpha, theta, and delta waves. Different patterns of EEG activity are associated with different states of consciousness. Beta waves tend to be for problem solving, alpha are relaxed and resting, delta are deep dreamless sleep. - Evolution of Consciousness : Consciousness must have evolved because it helped our ancestors survive and reproduce. One line of thinking is that consciousness allowed our ancestors to think through courses of action and their consequences and choose the best course without executing bad actions that may have damaging consequences. 2. Summarize what is known about the relationship of circadian rhythms to sleep. -Biological rhythms are periodic fluctuations in physiological functioning. - Circadian rhythms are the 24 hour biological cycles found in humans and many other species and are particularly influential in the regulation of sleep. Daily cycles also produce rhythmic variations in blood pressure, urine production, hormonal secretions, alertness, short term memory, etc. Research indicates that people generally fall asleep as their body temperature begins to drop and awaken as it begins to ascend once again. Circadian rhythms can leave individuals physiologically primed to fall asleep, optimal time varies from person to person depending on their schedules, each individual may have an ideal time to fall asleep. Ideal bedtime may promote better sleep quality which benefits health. When exposed to light some receptors in the retina send direct inputs to a small structure in the hypothalamus called the suprachiasmatic nucleus (SCN), this sends signals to the pineal gland that secretes melatonin which plays a role in adjusting biological clocks. Circadian rhythms are regulated by several internal clocks but is centralized in the SCN.
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern