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Canada (161,803)
Psychology (9,695)
PSYA01H3 (1,206)
Steve Joordens (1,058)
Chapter 5

psya01, chapter 5

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Steve Joordens

CUE WORDS or QUESTIONS PSYAO1 Chapter 5: SENSATION Senses succintly - clearly expressed - used by orgsms to learn, experience about world around them - eth learned about world detected by sensory organs and sent to brain via sensory nerves - w/out them, nth can be learned, orgsm have no thoughts/experiences Sensory Processing -> Experience: 1) Sensation 2) Perception - \ detecting the basic prop's of - \ detecting more sophisticated stimulus prop's of stimulus - brightness, colour, warmth, sweetness, - detecting the obj's (whether observing mvmt biotic/abiotic), what is their loc, locomotion, bkground (ex. apple) (ex. colour red) (ex. watermelon = perception) (ex. colour red & green = sensation) (ex. seeing a baseball come towards us and (ex. locomotion = sensation) knowing we have to catch it = perception) - needed for developing most fundamental features for sensory sys. -> Ken Hill's Story about Lost Boy in Canada's Open spaces - sound detection not same as identifiying meaning of source of sound -> Sensory mechsms - gustation (taste), olfactory (smell), auditory (hear), somatosensory (feel & touch) , visual (see) - >5 senses, (ex. somatosenses broken down into subcategories: touch, warmth, coolness, vibration, pain..) Transduction Brain and its Sensory Limitations - brain is stationed w/in protective layers, therefore directly isolated from external world - brain's OWN sens. receptors only detect blood's temp & [salt] = don't tell it (receptors to brain) about what's happening external to brain (ie. in other parts) - to conduct useful actions, must get info from outside world = retrieved from sensory organs external to brain region Sensory Organ External Stimuli it E it tranduces responds to (ie. converts this E into neural impulses) Eye Light Light E Ear Sound Mech.E Vestibular sys. Head tilt & rotation Mech.E Tongue Taste Molec. shape recog. Nose Odour Molec. shape recog. Skin, inner organs Touch, Vibration Mech.E Temp. Thermal.E Muscles Pain Chem. r'xn Stretch Mech.E Sensory Organs - stimuli detected by sensory organs comes from light, sound, odour, taste, or mech. contact from outside world - stimulatory info. goes from organs to brain via nerve impulses - nerve impulses = action pot.'s run by axons in sensory nerves Job = send info. to brain in way that it can rep. well about what is happening in environment. Brain's Job = analyze this coming info., & put together what just happened (perception)
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