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Related Flashcards
Cards In This Set
| Front | Back |
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Regarding touch, many sensations are blended together such as
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Pressure, vibration, smoothness, tickle, wetness
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Pain and temperature form a ____ system than touch
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Separate
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Touch is carried out by an array of ___ in the skin
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Receptors
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Receptors are __ to __ m^2 in area
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1 to 2
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3 layers of the skin
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Epidermis, dermis, subcutaneous (hypodermis) - not really part of skin
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Free nerve ending surrounded by an onion-like capsule
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Pacinian corpuscles
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Parcinian corpsucles detecs vibrations of around ___ Hz or more
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200
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What does rapid deformations of capsule lead to
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Stretching of the free nerve ending, opening Na+ channels
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Pacinian corpuscles have...
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Large receptive fields
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Is the pacinian corpuscles fast or slow adapting?
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Fast
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5 type of touch receptors
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- free nerve endings- merkels disc -Meissner's corpuscles -pacinian corpuscle - ruffini's ending
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Densely packed in skin areas with fine spatial resolution such as the hands, lips, tongue
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Merkels disc
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Merkel's discs respond to
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Very light touch such as a mosquito landing on your arm
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Is the merkel's disc fast or slow adapting?
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Slow adapting
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Merkels disc has...
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Great spatial resolution such as edge and point detection
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