Sensation: The conscious or subconscious awareness of external or internal stimuli. Perception: The...
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![Page 1: Sensation: The conscious or subconscious awareness of external or internal stimuli. Perception: The conscious awareness and the interpretation of meaning.](https://reader035.fdocuments.in/reader035/viewer/2022062321/56649e665503460f94b61988/html5/thumbnails/1.jpg)
![Page 2: Sensation: The conscious or subconscious awareness of external or internal stimuli. Perception: The conscious awareness and the interpretation of meaning.](https://reader035.fdocuments.in/reader035/viewer/2022062321/56649e665503460f94b61988/html5/thumbnails/2.jpg)
Sensation:• The conscious or subconscious
awareness of external or internal stimuli.
Perception:• The conscious awareness and the
interpretation of meaning of sensations.
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PainTemperatureLight touchPressureSense of body and limb position
TasteSmellVisionHearingBalance
General SensesGeneral Senses vs. vs. Special Special SensesSenses
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• Mechanoreceptors
• Thermoreceptors
• Photoreceptors
• Chemoreceptors
• Nociceptors
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skin, bones, internal organs, joints
Naked nerve endings surrounded by one or more layers
Pacinian corpuscle
Free nerve endings
Encapsulated Nerve Encapsulated Nerve
EndingsEndingsvs
Unencapsulated Unencapsulated
Nerve EndingsNerve Endings
Deeper tissue, muscles
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Free Nerve Endings - Pain & Temperature
Merkel’s Discs - Light Touch & Pressure
Root Hair Plexuses - Light Touch
pain, light touch, and temperature
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Pacinian Corpuscles - Deep Pressure
Meissner’s Corpuscles - Discriminative Touch in Hairless Skin Areas
Krause’s End-Bulbs - Discriminative Touch in Mucous Membranes
Ruffini’s Corpuscles - Deep Pressure & Stretch (Proprioception)
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Muscle Spindles - Skeletal Muscle Stretching (Proprioception)
Golgi Tendon Organs - Tendon Stretching (Proprioception)
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Somatic Pain-results from injuries to skin, muscle, joints, tendon vs.Visceral Pain- pain in body organs
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Referred Pain-felt on the body surface
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epidermis
dermis
subcutaneous fat
hair follicle
hair shaft
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free nerve endings
root hair plexus
Meissner’s corpuscles
Pacinian corpuscles
nerve
Krause’s End-Bulb
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Somatic Sensory Pathway
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Ascending Spinal Cord Tract
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Descending Spinal Cord Tract
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Primary Somatosensory Cortex & Primary Motor Area
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Primary Sensory Cortex
Primary Sensory Cortex
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Primary Motor Cortex
Primary Motor Cortex