General Sensations Flashcards
process signals received from the environment
PSN
sensory receptors
assigning meaning to sensation information
perception
pain
Free nerve endings
deep pressure
pacinian Corpuscle
touch stroking & fluttering
Reissner’s Corpuscles
touch
Merkel cells
heat
Ruffini’s corpuscles
cold
Krause’s Corpuscles
depends on interaction of: chemicals mechanical forces heat light sound
Sensation
Sensation divided into 2
General and Specialized
General Sensation divided into 2
Somatic and Visceral
info. about touch, pressure, temp. proprioception (position) and nociception (pain)
Somatic
info. about internal organs
composed to pressure and pain receptors
Viscera;
part of a general sensation are widely districts throughout the body
Mechanoreceptors
when we become aware of the sensory information and assign meaning to it
requires selective attention of the cerebral cortez
perception
what is the process by which sensory information is interpreted in a meaningful form?
perception
what ways to classify sensory receptors
- Location
- Modality
- Structure
Location:
Externoreceptors
Interoceptors
respond to stimuli originating in the external environment
situated at or near body surfaces
Includes: Receptors in the skin:
touch, pressure, pain, and temp.
Externoreceptors
respond to changes in body’s internal environment
visceral interoceptors: detect changes within internal organs Ej. baroreceptors
Somatic interoceptors: found within musculoskeletal structures detect body interaction with environment
Interoceptors
are lacked by visceral organs
proprioceptors
respond to one specific type of stimulus
sensory modality
senses changes in temperature
thermoreceptors
senses changes in chemicals
ej. blood and pH
chemoreceptors