Lecture Outline #18: General Sense/receptors Flashcards
fast pain
acute injury, involved injury, sensory cortex
slow pain
vague, soreness, often ignoreable
referred pain
indirect pain, viscera can’t directly tell brain what is happening because information is on rami communicantes which is on the ventral rami - same axon.
tactile receptors
skin - touch, pressure, vibration (Merkel, Meissner’s Pacinian corpuscles, free nerve endings, and Ruffini’s corpuscles
merkel cells
general touch
meisnner’s/tactile corpuscles
highly branched and specific, fine touch and localized pressure. Lips and fingertips
pacinian/laminated corpuscles
heavy pressure & deep vibration
controls rolling when you sleep
free nerve endings
initial traction, located everywhere
ruffini’s corpuscles
stretch receptors in dermis
barorecptors
BV’s, GI, UG & resp - senses pressure & volume within tubes
proprioceptors & golgi tendon organ
safety mechanism, senses stretch & position of muscles & joints
golgi - measure tension in tendons
thermoreceptors
change in temp & report to brain
does not detect extreme changes
chemoreceptors
chemical - CO2, O2, ph concentration & levels
allow for gustation & olfaction
carotid (CN IX) and aortic (CN X) bodies
what happens to co2 production when running
legs produce more co2 so brain increase heart rate to get rid of the co2 as quick as possible
CN I
hard-wired - linked to memory
olfaction - chemical
CN VII, IX, X
hard-wired - linked to memory
taste - chemical
CN II
vision - electromagnetic
CN VIII
equilibrium - inertia of fluids
hearing - vibration of air & fluids
olfaction flow
olfactory stimulus - olfactory epithelium - olfactory n. - olfactory bulb - olfactory tract - olfactory cortex - hypothalamus - limbic system for emotional/memory association & processing
floor of nasal cavity
anterior - hard palate (maxilla & palatine bones)
posterior - soft palate (muscular flap)
walls of nasal cavity
maxilla & palatine bones
nasal septum
anterior - septal cartilage
posterior - perpendicular plate of ethmoid & vomer
rood of nasal cavity
ethmoid bone covered in olfactory epithelium
nasal conchae
turbinate, warm & humidify air
superior - olfactory epithelium
middle - respiratory epithelium
inferior - respiratory epithelium
papillae
around 10000 cover tongue surface
most support/protect taste buds
papillae - filiform
no taste buds, fill in the space
papillae - fungiform
5-10 taste buds per 1
mushroom shaped
papillae - circumvallate
100 taste buds per 1
@ back wall, create an arrow in which way food goes
separates the anterior 2/3 and posterior 1/3
papillae - foliate
100 taste buds per 1
@ back/sides of tongue
look like folds
taste bud basic function
act as wiring in papillae
motor control of tongue
CN XII
chemical burns, temperature, and pain
CN V3
