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35 Cards in this Set
- Front
- Back
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Two types of senses
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General
Special |
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General senses
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Somatic, Visceral
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Special Senses
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smell, taste, sight, hearing, balance
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5 types of sensory receptors
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Mechanoreceptors, chemoreceptors, thermoreceptors, photoreceptors, nocioceptors
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Mechanoreceptors detect
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compression, bending, strenching of cells, touch, and pressure (proprioception, hearing, and balance)
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Chemoreceptors
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Chemicals attach to receptors(smell and taste)
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Thermo receptors respond to
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changes in temperature
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Photoreceptors respond to
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changes in light)vision)
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Nocioreceptors respond to
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exrreme mechanical, chemical, or thermal stimuli
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Three types of receptors based on location
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Exteroreceptors(skin)
Visceroreceptors(organs) Proprioceptors(joints, tendons) |
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Free Nerve endings detect
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Temperature Sensation
Pain |
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Most visceroreceptors are
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free nerve endings
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Merkel's Disk detect
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light touch and superficial presure
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Merkels Disks assosciated with
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dome-shaped mounds of thinked epidermis in hairy skin
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Axonal branches of merkels disk are
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flatted expansions assosciated with epithelial cells
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Hair follicle receptors detect
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slight bending of hair, as occurs in light touch
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Pacinian Corpuscles detect
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deep cutaneous pressure, cibration
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Pacinian Corpuscles also involved in
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proprioception
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Meissener Corpuscles detect
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simultaneous stimulations at two points on skin
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Meissner Corupsucles found on
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tongue and fingertips
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Ruffini end organs respond to
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continuous touch or pressure
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Ruffini end organs found primarily in
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dermis of fingers
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Muscle spindles involved in ___ and provide information about___
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stretch reflex
length of muscles |
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Golgi tendon organ respon to
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increased tension on tendon
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Spinothalamic tract part of the
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anterolateral system
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spinothalamic tract conveys
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pain, temperature, light touch, pressure, tickle and itch
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Three neuron system of spinothalamic tract
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Primary: periphery to posterior horn of spinal cord
Secondary: cross to opposite side, enter tract, ascend to thalamus Tertiary: thalamus to somatic sensory cortex |
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Medial lemiscal system carries sensation of
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Two point discrimiination, proprioception, pressure,vibration
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2 parts of medial lamiscal system
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fasciculus gracillis(inferior to midthorax)
fasciculus cuneatus(above the midthorax) |
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Three-Neuron system of medial lamisccal
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Primary: dorsal root ganglion, enter spinal cord without decussating
Secondary: Decussate and ascend to thalamus tertiary: project to somatic senory cortex |
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Trigeminothalamic Tract has fiver that join
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spinothalamic tract in brainstem
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Trigemeniothalamic trac carries info from
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face, nasal cavity, oral cavity
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Spinocerebellar system carries
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proprioreceptive information
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Spinoolivary tract contributes to
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coordination of movement assosciated with balance
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Spinotectal tract involved in
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relflexes that turn the eyes and head toward point of cutaneous stimulation
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