Term
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Definition
Conscious interpretation of the world based on
sensory systems, memory, and other neural processes |
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Term
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Definition
external environment
Somatosensory system: somatic and propioception |
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Definition
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Definition
| perception of limb and body positions |
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Term
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Definition
| Specialized structures that detect a specific form of energy in the external environment. |
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Definition
| light, sound, pressure, temperature, chemicals |
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Term
| Law of specific nerve energies |
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Definition
| A given sensory receptor is specific for each modality |
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Definition
| modality that receptors respond best |
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Term
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Definition
– Graded potentials
– Openingorclosingofionchannels – Triggered by sensory stimuli |
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Definition
| If the graded potential reaches threshold an action potential is sent to the Central Nervous System |
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Term
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Definition
Some receptors continue to respond to stimulus for as long as the stimulus is present. Most adapt over time.
– Decrease in amplitude of receptor potential
over time in the presence of a constant stimulus
• Corresponding decrease in frequency of action potentials
• Decreases perception of stimulus |
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Term
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Definition
| Show little adaptation and therefore can function in signaling the intensity of a prolonged stimulus. |
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Term
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Definition
Rapidly Adapting Receptors
– Phasic receptors
– Adapt quickly and thus function best in detecting changes in stimulus intensity.
– Respond to start of stimulus and adapt
Off response
– Someshowasecondsmaller
respSotinmsueluspon termination of stimulus |
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Term
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Definition
specific neural pathways transmitting information of a
specific modality |
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Term
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Definition
– Single afferent neuron, plus all receptors associated with it – All receptors are of same type
– Action potential may result from activation of receptors
– Receptive field: area in which a sensory unit is activated |
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Term
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Definition
| area in which a sensory unit is activated |
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Term
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Definition
| The perception of the positions of the limbs and the body |
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Definition
| Sensory receptors that detect physical forces such as pressure or vibration |
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Term
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Definition
• Sensory receptors that detect temperature
• Include peripheral thermoreceptors that detect skin
temperature and central thermoreceoptors that detect
core body temperature |
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Term
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Definition
| Sensory receptors on the surface of the body that detect tissue-damaging stimuli |
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Term
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Definition
• Free nerve endings
• Respond to temperatures
in the range of 30–43°C
• Increased frequency with increase in temperature |
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Term
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Definition
• Possible free nerve
endings
• Respond to temperatures
in the range of 35–20°C
Increased frequency with decrease in temperature |
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