Summary
NUR 183 Chapter 30 Summary
- Course
- NUR 183-602
- Institution
- Bergen Community College
This is a comprehensive and detailed summary on; sensation, perception and cognition. *Essential Study Material!!
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
Content preview
Sensation, Perception, & Cognition Ch:30Special sensory areas of brain receive & interpret stimuli from the sensory receptors.
Structures concerned with sense of smell & taste.
Sensory Systems
•Vision
•Hearing
•Taste
•Smell
•Touch
•Our sense of our body in space all help us to interpret & interact with our environment
in a meaningful way.
•To grow, develop, & function, we must be able to sense & respond to sensory input.
The Senses
•Provide information about
•Internal environment
•External environment
•Enable people to experience the world
•Our senses give us information about environment inside & outside of our bodies.
•Purpose of sensation is to allow body to respond to changing situations & maintain
homeostasis.
•Sensory experience involves 4 components in nervous system: stimulus, reception,
perception, & arousal mechanism.
•Allow response to changes
•Help body maintain homeostasis
•Necessary for human growth & development
Components of the Sensory Experience
Stimulus
•Trigger that stimulates receptor
, •Meaning depends on reception & processing
•loud noise
•bright light
•sour fruit
Reception
•Receptor converts a stimulus to nerve impulse & transmits impulse along sensory
neurons to CNS.
•Some receptors remain activated for as long as stimulus is applied
that is, their response declines with time.
•Adaptation explains why, over time, you become unaware of unpleasant smell or
persistent hum of air conditioner.
•Occurs through receptors
Thermoreceptors ▪Thermoreceptors in skin detect variations in temperature
Proprioceptors ▪Proprioceptors in skin, muscles, tendons, ligaments, & joint capsules coordinate
input to enable us to sense the position of our body in space (proprioception).
Photoreceptors ▪Photoreceptors located in retina of eyes detect visible light.
Perception
•Ability to interpret sensory impulses
•Ability to give meaning to impulses
•Affected by
Location of receptor
Number of receptors activated
Frequency of action potentials
Changes in above
Brain discards about 99% of all sensory information as irrelevant & unimportant
Arousal
•Composed of consciousness & alertness
•Mediated by reticular activating system (RAS)
•Affected by
Environment
Medications
RAS located in brain stem, controls consciousness & alertness.
-Neurons of RAS make connections between spinal cord, cerebellum, thalamus, & cerebral
cortex, relaying visual, auditory, & other stimuli that help keep us awake, attentive, & observant.
-Without such stimuli, CNS becomes lethargic, & person may lose consciousness.
-Anesthesia, sedatives, opioids, & some other drugs depress the RAS, as does a darkened, quiet
environment.
Response to sensations
Factors affecting response
Intensity of stimulus
Contrasting stimuli
Adaptation to stimuli
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller anyiamgeorge19. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.89. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67096 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now