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15 Cards in this Set
- Front
- Back
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Sensory Receptor |
Specialized cell or cell process that monitors conditions in the body or the external environment |
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General Senses |
Temp, pain, touch, pressure, vibration and proprioception (body position) Sensations arrive at somatosensory cortex |
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Special Senses |
Olfaction, gustation, equilibrium, hearing and vision. Specialized cells that are structurally more complex than general senses |
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Receptive Field |
Area monitored by a single receptor cell |
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Adaptation |
Reduction in sensitivity - Peripheral Adaptation - Central Adaptation |
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Peripheral Adaptation |
Receptors alter their levels of activity. Synaptic fatigue: - phasic receptors: fast adapting - tonic receptors: slow adapting |
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Central Adaptation |
Affects sensory pathway - inhibition of nuclei - restriction of detail arriving at cerebral cortex |
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General Sense Receptors Based on Environment |
Exteroceptors: external environment Propioceptors: body position Interoceptors: internal conditions |
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General Senses According to Nature of Stimulus |
Nociceptors: tissue damage (pain) Thermoceptors: temp change Mechanoreceptors: physical distortion, contact, pressure Chemoreceptors: chemical composition of body fluids |
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Mechanoreceptors |
Tactile Receptors: unencapsulated & capsulated Baroreceptors: stretch receptors Proprioceptors: jt position, tendon and ligament tension and muscular contraction |
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Tactile Receptors |
Unencapsulated - free nerve endings - Merkel's disc - root hair plexus Capsulated - tactile corpuscles - ruffini corpuscles - lamellated corpuscles |
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Olfaction |
Smell Olfactory Nerve (N I) |
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Gustation |
Taste Sweet, salty, bitter, sour & umami Facial Nerve (N VII) - anterior 2/3 Glossalpharyngeal Nerve (N IX) - posterior 1/3 Vagus Nerve (N X) |
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Equilibrium & Hearing |
Vestibulocochlear Nerve (N VIII) |
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Vision |
Optic Nerve (N II) Occulomotor (N III) Trochlear Nerve (N IV) Abducens Nerve (N VI) |
