Special Senses Flashcards
sensation
- conscious subconscious awareness of external/internal stimuli
- uninterpreted form of stimulus
perception
conscious awareness and interpretation of a sensation when sensory information reaches cortex
pathway of detection to interpretation
- stimulation
- transduction
- impulse generation & conduction
- integration
exteroceptors
- surface of body
- information external environment
interoceptors
- visceral organs/blood vessels
- information internal enviroment
proprioceptors
- body/joint position
- inner ear, muscles, tendons, articulation
nociceptors
pain stimulus
chemoreceptors
changes in chemical concentrations
mechanoreceptors
mechanical pressure/stretching
sensory adaptaion
- change in sensitivity to a stimulus
- prevents sensory overload
4 modalities of somatic sensation
- tactile
- thermal
- pain
- proprioceptive
meissners corpuscles
fine touch
pacinian corpuscles
pressure
proprioception
appreciation of of kinesthesia (body position)
gustation
- taste
- %80 of taste result of olfaction (smell)
external ear (auricle)
funnel collects sound waves channeling them towards middle ear
ceruminous glands
ear wax
tympanic membrane
- marks end of external ear
- seperates external ear to middle ear
middle ear
-tympanic cavity
ossicles
3 small bones extending across middle ear
-connects tympanic membrane to oval window
oval window
- in*
- opening between middle and inner ear
eustachian (auditory) tube
extends from middle ear to pharynx
-equalizes pressure across tympanic membrane
bony labrynth
-perilymph
membraneous labyrinth
-endolymph
semicircular canals
contains ampulla responsible for dynamic equilibrium