ANAT 2647 Dermatomes, Receptors and Reflexes

ANAT 2647 Dermatomes, Receptors and Reflexes - Dermatome...

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Dermatome Strip of skin  innervated by a  single spinal nerve
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Key Levels of Dermatomes
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Dermatome overlap
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Sensory Receptor A cell that responds to a stimulus
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Receptive field territory from which a  sensory unit can be  excited
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Sensory Transduction The transformation of a stimulus into an  electrical signal. Discriminative touch and kinesthetic  stimuli are carried by myelinated type A  axons Pain, Touch and temperature are carried by   unmyelinated type C axons
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Rapidly Adapting Receptors Phasic Respond quickly and maximally Will stop responding even when stimulus  continues
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Slowly Adapting Receptors Tonic Continue to respond to stimulus
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Classification by Source Exteroceptor Stimuli from outside environment Interoceptors Stimuli from internal environment Proprioceptors Position sense
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Classification by Function  (modality) Nociceptor pain Thermoceptors Temperature Mechanoceptors “physical deformation”
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ANAT 2647 Dermatomes, Receptors and Reflexes - Dermatome...

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