other senses Flashcards
explain the olfactory pathway to the brain
- odor enters into the naal passages
- contact the olfactory nerves
- receptor cells are activated and sned signals to the olfactory bulb
- signals are relayed via the olfactory tract to the brain / limbic system
five basic tastes?
- sour
- sweet
- bitter
- unami
- salty
the receptors for taste are groups of cells called taste buds which are found in little bumps on the tongue called ___________
papillae
___________ respond to deep pressure and vibration
pacinian corpuscle
*packin causes vibrations
___________ respond to light touch
meissners corpuscle
*light touch, you almost missed it
___________ respond to deep pressure and texture
merkel cells
*erkel often had interesting textures on his clothes
____________ respond to strech
ruffini endings
*youre going to have a rough time if you dont strech
___________ respond to pain and temperature
free nerve endings
*freedom comes from pain
_______________ is the minimum distance necessary between two points of stimulation on the skin such that two points will be felt as two distinct stimuli
two point threshold
explain physiological zero
normal temperature of the skin (86-97 degrees)
*cold = under physiological zero
*hot = above physiological zero
___________ perceives pain
nociceptors
*pain is a no no
explain the gate theory of pain
special gating mechanism can turn pain signals on or off, affecting whether or not we perceive pain
____________ refers to the ability to tell where one’s body is in space
kinesthetic space (proprioception)
what is the function of proprioceptors?
critical roles in hand eye coordination, balance, and mobility
four main modalities of somatosensation?
- temperature
- pain
- vibration
- pressure
