Lecture+5--Sensation+_+Perception+3+slides

Lecture+5--Sensation+_+Perception+3+slides - SENSATION...

Info icon This preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
10/11/10 1 SENSATION & PERCEPTION Outline What are sensation and perception? Vision: Do we really see what we think we see? Hearing & the Vestibular System Pain: What happens when we can’t feel? Definitions Sensation Detection of physical energy by sense organs Information sent to the brain Sensory input has no meaning on its own Perception The brain’s interpretation of raw sensory inputs Processing, organization, and interpretation of sensory signals Assembly of signals into a meaningful mental representation of stimulus
Image of page 1

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

View Full Document Right Arrow Icon
10/11/10 2 How is sensory information sent to the brain? Types of neurons: Sensory Interneurons Motor How does the information get into the sensory neurons? Our senses! Makes sense Q: How many senses do we have? A: Lots Our senses: Vision Audition (hearing) Chemical senses Olfaction (smell) Gustation (taste) Body senses Somatosensory (Touch, temperature and pain) Vestibular (Equilibrium) Proprioception (Body position) Links to the Nervous System Thalamus Sensory relay station/gateway to cortex Except smell Contralateral connections Right side of body Left hemisphere Left side of body Right hemisphere
Image of page 2
10/11/10 3 Sensory Cortex Smell Tast e Remember: The brain works in action potentials Transduction The language of the nervous system—action potentials Change is good Sensory adaptation A decline in activation within a sense receptor after initial activation Our senses love variation And it helps us to conserve energy and resources!
Image of page 3

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

View Full Document Right Arrow Icon
10/11/10 4 Definitions Sensation Detection of physical energy by sense organs Information sent to the brain Sensory input has no meaning on its own Perception The brain’s interpretation of raw sensory inputs Processing, organization, and interpretation of sensory signals Assembly of signals into a meaningful mental representation of stimulus From Sensation to Perception 1. Stimulus 2. Sensation 3. Sensory Coding 4. Perception A green light emits physical properties in the form of protons (light waves). Sensory receptors in the driver’s eyes detect this stimulus. The stimulus is transduced. The driver’s brain processes the neural signals and constructs the representation as a green light. Green Means Go! How do we see? Do we really see what we think we see? Vision
Image of page 4
10/11/10 5 Visual Input Light waves Visual Input: Brightness Light waves Brightness (the intensity of the reflected light that reaches our eyes) is determined by the wave’s amplitude (height) Quantitative coding Rate of action potentials Visual Input: Hue Light waves Brightness (the intensity of the reflected light that reaches our eyes) is determined by the wave’s amplitude (height) Hue (color) is determined by wavelength Distance from one peak to the next Qualitative coding Different receptors activated
Image of page 5

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

View Full Document Right Arrow Icon
10/11/10 6 Visual Input: Color Mixing
Image of page 6
Image of page 7
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