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Cards In This Set
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To be aware of their surroundings, an individual must have 4 areas of the sensory process present....
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Stimulus-agent that stimulates
Receptor-a nerve cell acts as recepter by converting
Impulse Conduction: impulse travels along nerve pathways to spinal cord or brain
Perception: awareness of stimuli in brain
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The brain has the capacity to adapt to _________ _______.
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Sensory stimuli
ex. living in a city you don't hear traffic noise
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Define awareness.
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Ability to perceive environmental stimuli and body reactions and o respond appropriately thru thought and action
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Protective extraocular structures of the eye.
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Eyebrows (shade/keep swat away),
eyelids (cover anterior eye),
eyelashes (touching makes us blink),
conjunctiva (lubricates),
lacrimal apparatus (secrete tears),
extrinisic eye muscles (move to follow object, keep shape)
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What do intraocular structures do?
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Transmit visual images and maintain homeostasis of the inner eye
-sclera, cornea, iris, pupil, and anterior cavity
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Purpose of sclera and cornea
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Lines outisde of the eye, protecting it and giving it shape-cornea allows light to enter
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Purpose of iris and pupil
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Disc of muscle surroundings the pupil and lying between the cornea and the lens
-iris-gives eye color, regulates light entry
-pupil-constricts with bright light and used for near vision
-dilates with light are dim and used for far vision
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Define pupillary light reflex.
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Response to intense light, pupils constrict rapidly
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Define accomodation.
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Eye adjusts to variations in distance
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What cranial nerves are responsible for transmitting taste information to the brain?
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VII, IX, and X
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Flavor is regulated mainly by _______.
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Smell
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What cranial nerve is primarily responsible for smell?
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I
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Factors affecting sensory perception
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Congenital and hereditary-FAS
Culture-amouth of stimulation that is normal
Stress-senses overload
Isolation-touch early in life is important
Medication and Illness-certain meds can alter senses
****elders at increased risk
Lifestyle and personality-quality and quantity
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In newborns the ability to distinguish color and other details is _______.
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Decreased
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By ____ months, eyes should be aligned and movement should be coordinated.
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3
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