Chapter 12/13 Flashcards
Exam 3
1
Q
Cranial nerve I
A
- olfactory nerve
- sensory
2
Q
Cranial nerve II
A
- optic nerve
- sensory
3
Q
Cranial nerve III
A
- occulomotor
- eye movements
- motor
4
Q
Cranial nerve V
A
- trigeminal
- somatic sensation from face, mouth, cornea
- sensory & motor
5
Q
Cranial nerve VII
A
- facial nerve
- sensory & motor
6
Q
Cranial nerve VIII
A
- vestibulocochlear (auditory)
- hearing & balance
- sensory
7
Q
Cranial nerve IX
A
- glossopharyngeal nerve
- tongue & pharnyx
- sensory &motor
8
Q
Cranial nerve X
A
- Vagus nerve
- gut, vocal cords, swallowing
- sensory & motor
9
Q
Merkel Cells
A
- fine detail (touching silk)
- LTMR
- AB fibers
- slow adapting
- piezo 2 channels
- mostly smooth skin, some hairy
10
Q
Meissener Corpuscles
A
- low frequency vibration and grip
- LTMR
- AB fibers
- rapidly adapting
- piezo 2 channels
- only smooth skin
11
Q
Ruffini Corpuscles
A
- stretch in skin
- LTMR
- AB fibers
- slow adapting
- smooth and hairy skin
12
Q
Pacinian Corpuscles
A
- high frequency vibration
- LTMR
- AB fibers
- rapidly adapting
- smooth and hairy skin
13
Q
Root hair plexus
A
- ex: feather brushes over your skin without touching it
- free nerve ending
- Aβ, Aδ , and C fibers
- rapidly adapting
14
Q
Where are propioceptors found?
A
Heart and blood vessels
15
Q
Muscle spindles
A
- muscle stretch
- propioception; free nerve endings
- IA; Aa fibers
- IA afferents rapidly adapting (rate of change); II afferents slow adapting (static length)
- piezo 2 channels
16
Q
Golgi tendon organs
A
- changes in muscle tension (ex: picking up a weight & dropping it)
- free nerve endings
- Ib afferents woven in collagen
- slow adapting
- piezo 2 channels
17
Q
Nociceptor fibers (general)
A
- A delta fibers are sharp pain and cold
- C fibers are longer acting pain and warmth receptors
18
Q
Acid-sensing ion channels (ASIC)
A
- nociceptors
- gated by H+ ions but permeable to Na 2+
- skeletal & cardiac muscle/burn in muscle
- piezo 2 channels
19
Q
Transient Receptor Potential Family (TRP)
A
- nociceptors
- permeable to Na and Ca
20
Q
TRPV1
A
heat and capsaicin
21
Q
TRPVR
A
mechanical stimuli
22
Q
TRPA1
A
chemical irritants such as noxious gas
23
Q
Where do sensory/afferent neurons synapse?
A
dorsal horn of spinal cord
