山东大学：《医学机能学实验》课程教学课件（PPT讲稿）06 DEMONSTRATE THE GENESIS OF BIPHASIC POTENTIAL

DEMONSTRATETHEGENESISOEBIPHASICPOTENTIAL

DEMONSTRATE THE GENESIS OF BIPHASIC POTENTIAL

IMPORTANT QUESTIONS1.what's the actionpotential?2.how to record it?

IMPORTANT QUESTIONS ◼ 1.what’s the action potential? ◼ 2.how to record it?

1.Intracellular recording

1.Intracellular recording

Measuringdevice0088AxonRecordingelectrodes+++++

2.Extracellular recording

2.Extracellular recording

StimulusDepolanzaianapplied-ta)ABx++(0)ABx+-enenerveimpulse(o)Nerve fiber

A B A B A B Nerve fiber

How to prepare a sciatic nervepreparation

How to prepare a sciatic nerve preparation.

Animal

Animal

PROCEDURE1. PITHINGPithing is done to destroy the brainand spinal cord by inserting thepithing needle

PROCEDURE 1. PITHING Pithing is done to destroy the brain and spinal cord by inserting the pithing needle

pithing needlegreat foramen

pithing needle great foramen