Chapter 6: Somatosenses Flashcards
(27 cards)
Describe cutaneous senses.
Skin senses (pressure, vibration, heating)
Describe proprioception.
Perception of body’s position and posture
Describe kinesthesia.
Perception of body’s own movements
Describe organic sense.
Sense modality that arises from receptors located within inner organs
How can we categorize cutaneous mechanoreceptors?
- Morphology
- Type of sensation they perceive
- Rate of adaptation (phasic and tonic)
- Receptive field
What does the tonic phase mean?
Adapt slowly
What does the phasic phase mean?
Adapt quickly
What’re free nerve endings? (mechanoreceptors)
Detect painful stimuli and changes in temperature
What’re Ruffini’s end organs? (mechanoreceptors)
detect tension deep in skin
What’re Pacinian corpuscles (mechanoreceptors?
Detect rapid vibrations/texture
What’re Meissner’s corpuscles (mechanoreceptors)?
Detect changes in texture and adapt rapidly
What’re Merkel’s discs (mechanoreceptors)?
Detect sustained touch and tension of skin
What happens to the warmth thermoreceptors?
Increase in action potential rate during warming and decrease during cooling
What happens to the cold receptors (thermoreceptors)?
Faster conduction increased during cooling and decrease during warming
How many types of fibers (nociceptors)?
2
Describe thermal nociceptors.
noxious heat or cold
Describe mechanical nociceptors.
excess pressure, mechanical deformation or cut
Describe chemical nociceptors.
wide variety of environmental irritants
Describe silent/sleeping nociceptors.
onset of inflammation to surrounding tissue
What is the dorsal column pathway?
Carries touch and kinesthesia information
What is the spinothalamic tract?
Carries pain and temperature information
What is the sensory component of pain?
pure perception of intensity of painful stimulus
What is the immediate emotional consequences of pain?
unpleasantness or degree to which individual is bored by painful stimulus
What is the long-term emotional implications of chronic pain?
threat that such pain represents
