Biomedical Instrumentation Electrophysiology (ENG-EMG)

Slides:

Advertisements

Similar presentations

2nd practice Medical Informatics Biomedical Signal Processing TAMUS, Zoltán Ádám

Advertisements

EE 5340, SMU Electrical Engineering Department, © Carlos E. Davila, Electrical Engineering Dept. Southern Methodist University slides can be viewed.

Traditional Electromyography (Electrodiagnosis) A Guide to Understanding Concepts of Electrodiagnostics Joseph S. Ferezy, D.C. © 1999.

Conduction velosity By Dr shereen algergawy

CARPAL TUNNEL SYNDROME Nerve Conduction Study

EMG & Motor Neurons Chapter 18 KINE 3301 Biomechanics of Human Movement.

Muscle Activation Concepts in Electromyography. EMG n The recording of muscle action potentials (MAPs) n Recorded with surface electrodes as the MAPs.

Electromyography: Physiology D. Gordon E. Robertson, Ph.D. Biomechanics Laboratory, School of Human Kinetics, University of Ottawa, Ottawa, CANADA.

Neuromuscular Adaptations During the Acquisition of Muscle Strength, Power and Motor Tasks Toshio Moritani.

EE 5340/7340, SMU Electrical Engineering Department, © Carlos E. Davila, Electrical Engineering Dept. Southern Methodist University slides can be.

ELECTROMYOGRAPHY AND MOTOR NERVE CONDUCTION VELOCITY

8C120 Inleiding Meten en Modellen – 8C120 Prof.dr.ir. Bart ter Haar Romeny Faculteit Biomedische Technologie Biomedische Beeld Analyse

Chapter 14 Neuromuscular Fatigue. What is neuromuscular fatigue? A temporary decrease in muscular performance seen as a failure to maintain or develop.

EMG The Muscle Physiology of Electromyography Jessica Zarndt

EMG Theory of NCS/EMG.

Electromyography Nerve conduction study (NCS) Electromyography (EMG) Evoked potential study (EP)

Nerve Injuries: PNS reaction & EMG findings §William McKinley MD §Associate Professor PM&R §Virginia Commonwealth University.

I N T HE N AME OF A LLAH T HE M OST B ENEFICENT T HE M OST M ERCIFUL 1.

ELECTROMYOGRAM Amit Sethi Pre-doc Rehab Sciences, MS OTR/L.

MONITORING OPERATIONS FOR VESTIBULAR SCHWANNOMA CHAPTER III.

Electromyography (EMG) Theory of Operation & Underlying Anatomical and Physiological Issues.

Applied Nerve & Muscle Physiology : Nerve Conduction Study ( NCS) )and Electromyography ( EMG) Dr Taha Sadig Ahmed Physiology Department, College of Medicine,

ELECTRODES FOR RECEPTION AND STIMULATION IN THE BODY.

Measuring Action Potential Conduction Velocity and Determining the Site and Extent of Spinal Cord Injuries based on Sensory Deficits.

Electromyography IE 665 Dr. Sengupta. Outline Muscle Moment – Moment Arm Review of Muscle Contraction Physiology Physiological Basis of EMG Methods of.

In The Name of Allah The Most Beneficent The Most Merciful 1.

INTRODUCTION The cell is the basic structural and functional unit of all living organism. It is the smallest unit of life, and is often called the building.

Recruitment Modulate force production by –Recruitment: changing the number of active MUs Size Principle: recruitment threshold is proportional to MU force.

Physiology of the Motor Unit

EE 4BD4 Lecture 10 Electromyography.

Electromyography (EMG)

Electromyography Tatiana Steinwarz.

Biomedical Instrumentation Electrophysiology (ENG-EMG)

EE 4BD4 Lecture 7 Recording Biopotential Fields. Need for Amplifiers 2.

DIAGNOSTIC METHODS IN NERVOUS SYSTEM pathological physiology seminar.

The microscopic study of tissue. It is important to know the structure and function of tissues In order to understand how individual cells are organized.

CS 2016 Introduction to Practical 5 Nerve Conduction & Muscle Response Christian Stricker ANUMS/JCSMR - ANU

Electricity within the body lect.8

Course Website: PD233: Design of Biomedical Devices and Systems (Lecture-7 Biopotentials 2) Dr. Manish Arora CPDM,

Chapter -The Origin of Bio potentials Anotomy

Dr. Aida Korish Assoc. Prof. Physiology KSU

AU Neuro Technology Lab - Research Profile

Experimental methods in nerve muscle physiology

Objectives Define what is nerve conduction study (NCS) and electromyography ( emg) . Explain the procedure of NCS using Abductor Pollicicis Brevis muscle.

C. Nerve conduction studies demonstrate changes characteristic of an axonal neuropathy. When the ulnar nerve is stimulated above the elbow or at the wrist,

Electroneurographic examination of the ulnar nerve in the dog:

Dr. Salah Elmalik MBBS,PhD

Physiology of the Motor Unit

Physiology of the Motor Unit

Applied Nerve & Muscle Physiology : Nerve Conduction Study ( NCS) )and Electromyography ( EMG) د. طه صادق أحمد بكالوريوس الطب و الجراحة ( جامعة الخرطوم.

Nerve Conduction Study (NCS) and Electromyography ( EMG)

Clinical neurophysiology exploration (cne01)

Neurophysiological Basis of Movement

Examples of motor and sensory studies for the ulnar nerve

به نام خداوند جان و خرد کزین برتر اندیشه برنگذرد

Basics of Nerve Conduction Studies Review

محاظرة : التاسعة العشرة

Microneurography in humans: microneurography is an electrophysiological technique to record action potentials from individual peripheral nerve axons in.

Electromyography: The analysis of muscle electrical activity

Histology The microscopic study of tissue.

(A, B). (A, B). Median motor nerve conduction study. Active recording electrode is over the APB muscle, with stimulation at the wrist, elbow, axilla,

Microneurography in humans: microneurography is an electrophysiological technique to record action potentials from individual peripheral nerve axons in.

Applied Nerve & Muscle Physiology: Nerve Conduction Study ( NCS) and Electromyography ( EMG) Dr. Salah Elmalik.

Dr. Aida Korish Assoc. Prof. Physiology KSU

Dr. Salah Elmalik MBBS, PhD

Biomedical Electronics & Bioinstrumentation

Dr Moizuddin Khan Dr Beenish Mukhtar

Electrophysiologic and MR changes in L5 nerve root lesion.

Fig. 5 Probing spinal cord electrophysiology with flexible and stretchable neural probes. Probing spinal cord electrophysiology with flexible and stretchable.

Presentation transcript:

Biomedical Instrumentation Electrophysiology (ENG-EMG) Carlos E. Davila, Electrical Engineering Dept. Southern Methodist University

Electroneurogram (ENG) Nerve response along nerve periphery is then measured. Measured by stimulating a peripheral nerve with electric shock. Can be used to determine nerve conduction velocity:

5 ENG (cont.) hypothenar muscle + _ biphasic stimulate ulnar nerve

EE 5340/7340, SMU Electrical Engineering Department, © 2005 ENG(cont.) right ulnar neuropathy in elbow (Aminoff) 10 6 2 L mV R peak amplitude 10 6 2 R latency L ms 0 10 20 30 40 50 EE 5340/7340, SMU Electrical Engineering Department, © 2005 6

EE 5340/7340, SMU Electrical Engineering Department, © 2005 Electromyogram (EMG) signal generated by muscle cells amplitude: 0.1-5 mV freq range: 0-10,00 Hz measurement: needle electrodes single motor unit (SMU): smallest area of muscle tissue that can be activated by a volitional effort SMU generates a triphasic potential having a amplitude of 20-2000 mV lasting 3-15 ms. Firing rate of SMU 6-30 per second. EE 5340/7340, SMU Electrical Engineering Department, © 2005 7

EE 5340/7340, SMU Electrical Engineering Department, © 2005 Electromyogram (EMG) Recruitment SMU SMU SMU SMU SMU contraction effort can’t distinguish individual SMU’s interference pattern EE 5340/7340, SMU Electrical Engineering Department, © 2005 8

EE 5340/7340, SMU Electrical Engineering Department, © 2005 EMG Affected by Disease In neuropathy, diseased nerves degenerate, then regenerate. Regenerated nerves conduct more slowly than healthy ones. This produces a desynchronization in the EMG pattern. EE 5340/7340, SMU Electrical Engineering Department, © 2005 9

EE 5340/7340, SMU Electrical Engineering Department, © 2005 Evoked EMG Measurements/ENG hypothenar muscle healthy + _ 10 ms pathology stimulate ulnar nerve EE 5340/7340, SMU Electrical Engineering Department, © 2005 10