EMG Fundamental principles
- 최초 등록일
- 2010.06.16
- 최종 저작일
- 2010.06
- 19페이지/
한컴오피스
- 가격 2,000원
소개글
EMG Fundamental principles에 관하여 근전도 textbook인 드미트로 위주로 요약정리한 글입니다.
목차
Nerve and Muscle Anatomy and physiology
Electrical Sources and Volume Conduction
Waveform morphology in nerve
Waveform morphology in muscle
Instrumentation
Electrodes
Amplifiers
High-and Low-frequency filters
Analag to digital(A/D) conversion
Cathode ray tube(CRT) displays
Simulators
Interference(간섭)
Electrical safty
본문내용
** Nerve and Muscle Anatomy and physiology
Resting Membrane Potential
- all living cells : intracellular (-), extracellular (+)
- resting membrane potential
: potential difference across the cell membrane, when an AP is not present
- dynamic equilibrium develops between
① the intracellular negative charges pulling K+
② the high intracellular K+ concentration attempting to push K+out
;potential difference a negative 60-90mVs compared to the extracellular environment
Action potential generation
-two basic excitable tissues in humen body ; nerve(n) and muscle(m)
-m`s intracellualr AP in monophasic positive
n`s intracellualr AP biphasic and initially positive
**Electrical Sources and Volume Conduction
Volume conduction theory
-describes the three-dimensional spread of electrical current (=charge movement) in any conducting medium
-current density: amount of separation from one current line to the next
greater near the battery poles than further away
-dipole(+,-); current flow (+) -> (-)
-current lines extend between the positive and negative poles
-isopotential lines are perpendicular to the current lines
; represent a constant potential or voltage magnitude
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