Term
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Definition
| use calipers on different areas of skin to determine minimum distance where patient feels 2 separate points of contact - helps to determine receptor density |
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Term
| Testing Tactale Localization |
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Definition
| measures abillity to determine which portion of the skin has been touched. Tester touches subject with marker, subject tries to touch exact spot with different marker and difference measured in millimeters. Smallest localization = greatest density of receptors |
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Term
| Density and location of touch and temperature receptors |
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Definition
| testing heat, cold, and light touch receptors using a hot and cold probe and a feather. Cold receptors > heat receptors - thermo dense in nose and ears and on face. |
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Term
| adaptation of touch receptors |
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Definition
| duration of feeling a coin on forearm in different places and with adding of coins. Also bending of individual hair - sensation greatest when hair springs back into place |
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Term
| adaptation of temperature receptors |
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Definition
| hands in hot and cold water over 2 minutes - which one adapts fastest? Cold adapts quicker. No sensation of hot or cold when water is near skin temperature. |
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Term
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Definition
| painful stimulus in one place, but pain felt in another. Elbow placed in cold water and sensation and location of sensation recorded over 2 minutes in water and 3 minutes afterwards. |
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Term
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Definition
| area of optic disc where there are no photoreceptors |
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Term
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Definition
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Term
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Definition
| light focuses in front of retina |
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Term
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Definition
| light focuses behind the retina |
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Term
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Definition
| image formed on retina is mirror image and upside down and smaller than object |
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Term
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Definition
| irregularities of curvature of cornea or lens - tested with an astigmatism testing chart - which lines look darker or distorted indicates astigmatism |
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Term
| near point of accomadation |
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Definition
| move pin held at arms length in slowly for each eye - area where it becomes distorted is near point of accomodation |
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Term
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Definition
| deficiencies in the cones of color photorecepotor cells - blue, green, or red. Ishihara's Color Plates used. |
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Term
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Definition
| protection of retinal by constricting of pupil by circular muscle of iris |
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Term
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Definition
| pupil constricts as subject accomodates |
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Term
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Definition
| eyes converge in order to foveate on near object |
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Term
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Definition
| pack 1 ear - ticking clock near unpacked ear - record distance when subject can't hear it anymore |
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Term
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Definition
| subject closes eyes, pocket watch audible distance - check front back sides and above. See if they can locate it accurately |
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Term
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Definition
| test tuning forks of different frequencies |
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Term
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Definition
| determines conductive and sensoreineural deafness - strike fork and put on top of head in center - equally heard? - sensoreineurla deafness indicated in 1 ear if tone is not heard in that ear. Conduction deafness indicated if sound is heard more stongly in the ear with conduction deafness. |
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Term
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Definition
| bone vs air-conduction hearing - strike and hold tuning forks next to ear and on mastoid process. |
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Term
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Definition
| walk straight line, pick up coins |
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Term
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Definition
| determines integrity of dorsal white column of spinal cord - sends impluses from proprioceptors to brain. Draw line on board. Subject stands with back to blackboard, eyes open, swaying? Eyes closed, swaying? Open and closed with left arm up, swaying? |
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Term
| role of vision in equilibrium |
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Definition
| raise right or left foot, eyes open 1-2 minutes. Do again with eyes closed. Observe. |
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Term
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Definition
| cotton with oils on them - stuff nose and record time til the smell not noticed anymore. |
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