Lecture 18 Content Flashcards
What are some examples of Fast pain receptors?
Acute injury, involves reflexes, sensory cortex
What are some examples of slow pain receptors?
vague, soreness, often ignore-able
what is an example of referred pain?
pereption of the pain is always not the source
What are mechanoreceptors? types?
Tactical receptors (skin) touch, pressure, vibration
Baroreceptors: pressure within tubes
Propriocepters:stretch Thermoreceptors: changes in temp
Chemoreceptors: chemical
Name the diffrent tacticle receptors?
Merkel cells - general touch
Meissners corpuscles - fine touch localized
Pacinian corupuscles - heavy pressure, vibrations
What are Baroreceptors?
BV’s GI. UG pressure within tubes
What are Baroreceptors?
BV’s GI. UG pressure within tubes
What are propriceptors?
Muscles and joints - strech recaptors (SOMATIC)
- golgi tendon organs - measure tension in tendons
what are thermoreceptors?
changes in temperature
What are chemoreceptors?
Chemical
- caroitid and aortic bodies: CO2, O2 concentrations
What CN’s are special senses?
OLFACTION: CN I
TASTE: CN VII, IX , X
VISION: CN II
HEARING: CN VIII = also equilibrium (inertia of fluid)
What are the parts that make up the nasal cavity?
- floor of nasal passage
- Walls
- roof: ethmoid bone covered with olfactory epithelium
- Nasal septum
- Nasal conchae (Turbinates) warm and humidify air
What are the parts that make up the floor of the nasal passage?
anterior : hard palate = maxilla, palatine bones
Posterior : soft palate = muscular flap
What makes up the wall of the nasal cavity?
Maxilla and palatine bones (maxillary sinus)
What makes up the parts of the nasal septum?
Anterior: septal cartilage
Posterior: perpendicular plate of ethmoid and vomer
What makes up the parts of the nasal Conchae?
Warm and humidify air
Superior nasal Conchae - olfactory epithelium
Middle nasal Conchae - respiratory epithelium
Inferior nasal conchae - largest easily broken, respiratory epithelium
Describe the Olfactory nerve (CNI)
- olfactory foramina in the cribriform plate of ethmoid
- synapse w/ olfactory bulbs (cerebrum)
- olfactory cortex> hypothalmus > limbic system
(emotional/behavioral response to smells)
What is papillae?
10,000 papillae cover tongue’s surface
- most papilla support/protect taste buds
TASTE BUDS ARE NOT PAPILLAE
What are the 4 types of papillae?
Filiform - filament - shape (provides friction) - no taste buds, no nerve endings
Fungiform - mushroom shape (nerve endings)
circumvallate - @ back wall of tongue
Foliate - leaf-shaped @ back sides of tongue
What are chemoreceptors? related to taste buds?
Taste buds - chemical stimuli
- CN VII IX X (7,9,10) replay taste from taste buds to the brain
What does CN V do for the tongue?
Chemical burns, temperature, pain
What does CN XII do for the tongue?
motor control of intrinsic tongue muscles
