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| senses mechanical force or pressure |
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| sense light touch in hairless skin (finger tips, lips, nipples) |
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| deep pressure; located deeper in the skin or muscles and tendons |
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sensations stimulated by chemicals.
Includes taste, smell, and pain; also H+, O2 and CO2, K+ receptors |
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stimulated by light energy.
rods and cones in the eyes |
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Stimulated by tissue damage;
Damaged cells leak chemicals like histamine. May also be stimulated by excessive temperatures or excessive mechanical stimulation |
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| Feeling that occurs when brain interprets sensory impulse. |
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| The location the impulse lands in the brain determines how the brain interprets it. |
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| How does brain tell one sensation from the next? They all look like an electrical impulse. |
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| Responds to Temp. between 50 and 68 degrees F |
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| When a stimuli is constant or unchanging the neurons will stop sending the impulses to the brain |
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| Sensors located in muscles, tendons, and joints that sense mechanical stimulation. Important for balance and tone in muscles |
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| Everywhere except the brain |
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| Where are pain sensors located? |
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| Enkephalins and endorphins |
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| The body's natural pain killers. The make it hard for pain neurons to depolarize. |
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| Thick, myelinated fibers that send sharp pain signals. Pain stops when stimulus stops. Usually in skin. |
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| thin, unmyelinated fibers that send widespread pain signals. Usually in organs/viscera. |
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| Occurs when different organs share a common nerve pathway; ex. heart attack and left arm pain |
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| When brain sends impulse back to original source of stimulation. This makes us think our fingers sense touch. |
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| Part of brain that provides a general awareness of pain. |
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| Part of brain that interprets location of pain and intensity of pain, and provides a response to pain |
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