Topic 2 Flashcards
Where is the sensory ending located in the msucle spindle afferent Ia
on muscle spindle and then goes to the spinal cord
How is the muscle spindle afferent Ia
Interneuron or motor neuron
What information is transmiited in msucle spindle afferent Ia
rate of muscle stretch
Where does it synapse and on what?
dorsal root ganglion ?????????
Secondary muscle spindle afferents (II)
a. Where is the sensory ending located?
b. How is it stimulated?
c. What information is transmitted?
d. Where does it synapse and on what?
??????????
a. Where is the sensory ending located?
b. How is it stimulated?
c. What information is transmitted? extent of muscle stretch
d. Where does it synapse and on what? extent of muscle stretch
Apla motor neurons are only used in
muscles contractions
How do mechanoreceptors transmit information/generate APs? What are the four steps from
stimulus to AP generation?
Ex: The more you press on your hand for example the more sodium channels open
4 steps:
1.stimulus is applied
2.deformation of the receptor or nerve endings
3. receptor potential generated
4. action potential generation
Identify slow vs. rapid adaptation
Slow:
Change very little over time
response to long stimuli
Ex: stimuli –> pressure
Rapid:
Quick Change
Detect onset
Ex: Stimuli –> Vibration
Why are fingertips the best at two-point discrimination?
Higher density of mechanorecptors
Receptors with small field
What does the gamma motor neuron system do to aid sensitivity of information from the
muscle spindle afferents?
??????????
Interfusal muscle spindles
Be able to describe a reflex circuit – relations between neurons, label afferents, and what the
result will be at the muscle(s)
What is a monosynaptic reflex? Be able to diagram it
1 sensory neuron synapses on a muscle neuron
idk how to diagram
How does the tendon tap reflex work? Be able to diagram it
How will i know if its an inhibitory neuron????? ask her
