Neurophysiology with short hint in this presentation (propagation of nerve impulse)

1. Neurophysiology
(nerve impulse)
Prep: Amen Ullah
KMU-IPMS

2. Alert: Contents Include in this presentation are
only some intimations of the topic.

3. Mechanism of impulse conduction
1. Resting membrane potential
2. Generation of impulse
3. Conduction of impulse/propagation
4. Repolarization
5. Refractory period

4. Mechanism of impulse conduction
1. Resting membrane potential
Nerve cell -70mv
Muscle cell -90mv

5. 2. Generation of impulse
Stimulus-------impulse is generated
Voltage--------(-70 to -55mv)
Then -55 to +45

6. 3. Conduction/propagation of impulse
Large loops
Salutatory conduction
20 times more in myelinated nerve fibers

7. 4. Repolarization
Outer electro positivity is due to K+

8. 5. Refractory period (active Transport)
Active Process---Use ATP
Now the electro positivity is due to Na+ ions

9. Thank You