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Description
Flashcards by Zoila Rojas, updated more than 1 year ago
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Created by Zoila Rojas
over 8 years ago
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| Question | Answer |
| receptor potential | analogous to generator potential, it is a change in electrical voltage within a sensory receptor which is connected to an axons of sensory neuron |
| sensory information | actual process by action potentials are traveling along axons, formed by the nerve pulse generated by deformation of sensory membrane |
| nerve conduction study | clinical test for sensory information transmission, picks up electrical activity in peripheral nerve |
| sensation | process by which information reaches the sensory cortex |
| perception | interpretation of sensation into some meaningful explanation |
| sensory detection | unconscious or conscious awareness of stimulus |
| sensory modulation | the ability to regulate and organize degree and intensity of responsiveness to sensory stimulus |
| sensory discrimination | similar to perception, its the ability to differentiate quality, similarities and differences of sensory information |
| sensory integration | general term for person's ability to organize sensations from one's own body and the environment (requires all other aspects of sensory processing) |
| rapidly adapting (phasic) | receptors respond quickly at first and stop firing when stimulus continues over time |
| slowly adapting (tonic) | receptors generate sustained response during stimulus of long duration |
| Merkel's disc | superficial mechanoreceptor for the detection of superficial pressure and sustained touch, small receptive field, slowly adapting tonic receptor (e.g. Prime Minister of Germany, Angela Merkel who's slow response to the refugee crisis was superficial albeit sustained and who put increasing pressure on other EU countries to shape up) |
| hair follicle receptor | superficial mechanoreceptor |
| Meissner's corpuscle | superficial mechanoreceptor of light touch and vibration, small receptive field, and rapidly adapting phasic (e.g. Mister Scrooge Mcduck who miserly hordes all the receptors for himself and quickly changes to the adapting economic needs of his pocket) |
| Pacinian's corpuscle | subcutaneous mechanoreceptors of deep touch and high frequency vibration, large receptive field, rapidly adapting phasic (e.g. Tony Montana in the last scene of scarface with his giant gun mowing down baddies) |
| Ruffini's endings | subcutaneous mechanoreceptors respond to stretch in the skin, slowly adapting tonic (e.g. think of ruffians trying to rough up your skin by giving you an unfortunately named indian burn) |
| two-point touch discrimination | commonly used test of how distinct are the sensory receptors in particular area of body |
| A-alpha fibers | proprioception from skeletal muscles, large diameter and heavily myelinated |
| A-beta fibers | carry info from mechanoreceptors in skin, smaller diameter than A-alpha with a little less myelin |
| A-delta fibers | carry info for pain and temperature especially acute pain, small diameter and less myelination than A-beta fibers |
| C fibers | carry info for pain, temperature and itchy. Especiall chronic pain with travels much more slowly and is more diffuse. Small diameter and unmyelinated |
| dermatome | Information is coming from the skin and entering at a particular spinal level |
| primary sensory area | only responds to information coming from medial leminiscus, post central gyrus or S1 or brohdman's area 3,1, and 2 |
| secondary sensory area | interprets information, anterior parietal |
| tertiary sensory area | posterior parietal, Make interpretations of multi modal information, neurons are different from primary and secondary regions: large receptive fields and no preference for particular stimulus |
| stereognosis | the mental perception of depth or three-dimensionality by the senses, usually in reference to the ability to perceive the form of solid objects by touch. This process is mediated by neurons in posterior parietal cortex. |
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