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32 Cards in this Set
- Front
- Back
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Fast pain is sent from what ascending tract?
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SpinoTHAL
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Slow pain is sent from what ascending tract?
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PALEOspinothal
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What type of receptor generates an AP w/changes in shape?
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Mechanoreceptors
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What receptor sense tactile shapes and surfaces?
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Meissner's Corpuscles
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What mechanoreceptors sense stretching and shapes?
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Ruffini endings
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What mechanoreceptors sense vibrations?
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Pacinian Corpuscles
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What mechanoreceptors sense proprioception?
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Muscle Spindles
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What is Nociceptor is encapsulated and results from a pin prick?
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Adelta mechanical
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What Nociceptor has free nerve endings and results from tissue damage?
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C-polymodal
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Where are cell bodies of First order afferent neurons located?
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in DRG
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Where are cell bodies of Second Order Afferent neurons located?
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in cell body SC or brainstem
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Where are cell bodies of Third Order Afferent neurons located?
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in Thalamus
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What describes the "form" of a stimuli?
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Modality (mechanical, thermal, etc.)
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What describes the "strength" of a stimuli?
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Intensity
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What is the smallest intensity at which a sensation is detected?
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Sensory Threshold
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What is it called when the intensity of sensation diminishes when stimulus is continuous for an extended period of time?
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Adaptation
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What is conversion of sensory stimulus into Neural activity?
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Stimulus transduction
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What are converted into specific patterns of AP and are called "Neural Codes"?
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Intensity + Duration
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Increase in Intensity= increase in ______________=increase in_________________.
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increase in magnitude of receptor potential; increase in rate and number of Aps
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Increase in duration= decrease in_____________________.
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amplitude of receptor potential
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What are the largest, myelinated fibers found and what are they used for?
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Aa fibers for fine touch and proprioception
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What are the small,unmyelinated fibers used for info about pain?
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C fibers
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What is static proprioception?
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awareness of position of limbs
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What is kinesthesisa?
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movement of limbs
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What are the major sensory endings for Nociceptor senses?
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Non-encapsulated (free nerve endings)
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What type of nerve endings are used for 2 point discrimination?
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Encapsulated Endings---also used for braille
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What test can be done to test the integrity of the ML and tests the static proprioception for the lower body?
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Romberg test
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What tests can be done for dynamic proprioception?
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Upper Body test for proprioceptive sense
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What is a possible dorsal column lesion that would cause high steppage and unsteady gait that is exabberated by a Romberg's test?
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Tabes Dorsalis
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What is a systemic dx resulting from vit. B12 defcy?
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Subacute Combined Degeneration of SC
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What is a dx that causes damage to the fasciculus Cuneatus of Cervical Spine?
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Multiple Sclerosis- loss of proprioception of hands and fingers
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What is Astereognosis?
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inability to identify shape and nature of objects by touch alone
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