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I-NERVE CONDUCTION STUDIES

Basic Nerve Conduction Studies

Procedural

Grounding

Stimulation

Recording

Findings

Motor Responses

Sensory-Nerve Action Potentials

Distal Latency

Conduction Velocity

Machine Settings

Normal Values

Troubleshooting

No Response

Muscle Contraction But No Evoked Response

Stimulus Artifact

Abnormal Recorded Potential

Initial Positive Deflection

Pathological Processes

Demyelination

Conduction Block

Axonal Loss

Nerves Studied in the Upper Extremity

General Rules

Temperature Effects

The Brachial Plexus

The Median Nerve

Median Entrapment, Compression or Injury Sites

The Ulnar Nerve

Ulnar Entrapment, Compression or Injury Sites

The Radial Nerve

Radial Entrapment, Compression or Injury Sites

The Musculocutaneous Nerve

Musculocutaneous Entrapment, Compression or Injury Sites

The Axillary Nerve

Axillary Entrapment, Compression or Injury Sites

The Spinal Accessory Nerve

Spinal Accessory Entrapment, Compression or Injury Sites

Nerves Studied in the Lower Extremity

The Lumbo-Sacral Plexus

The Peroneal Nerve

Peroneal Entrapment, Compression or Injury Sites

The Posterior Tibial Nerve

Posterior Tibial Entrapment, Compression or Injury Sites

The Femoral Nerve

Femoral Entrapment, Compression or Injury Sites

The Sciatic Nerve

Sciatic Entrapment, Compression or Injury Sites

The Sural Nerve

The Superficial Peroneal Nerve

The Saphenous Nerve

Variations in the Innervation of the Upper and Lower Extremities

Crossovers

The hypothenar type

The first dorsal interosseous type

The thenar presentation

Accessory Peroneal Nerve

Cranial Nerves

Facial (VII)

Trigeminal (V)

Blink reflex

Blink Reflex Findings

Jaw jerk

The H-Reflex and F-Wave

H-Reflex

F-Wave

F-Wave ratio

Nerve Conduction Work-Ups

Routine Upper Extremity

Routine Lower Extremity

Generalized Neuropathic Process

Myopathy

Neuromuscular Junction

Presynaptic Neuromuscular Junction Work-Up

Postsynaptic Neuromuscular Junction Work-Up

Nerve Conduction Studies/Findings in Certain Disease Entities

Anterior Horn Cell Disease

Root Lesion

Plexus Lesions

Compression/Entrapment Neuropathies

Myopathy

Neuromuscular Transmission Defect

Polyneuropathies

Trauma

II-NEEDLE EXAMINATION

Electrodes

Monopolar Needle

Concentric Needle

Single-Fiber Needle

Surface Electrode

The Motor Unit

Needle Exam Description

The Muscle at Rest

Insertional activity

Spontaneous activity

The Muscle During Voluntary Effort

Mild effort

Moderate effort

Full efort

Basic Pathological Processes Seen with the Needle Examination

Spontaneous Activity

Fibrillations and Positive Waves

The Positive Sharp Wave

The Fibrillation Potential

Fasciculations

Complex Repetitive Discharges

Myokimic Discharges

Neuromyotonia

Myotonia

Voluntary Activity

The Neurogenic Motor Unit

In complete transection

In partial nerve injury

The Myopathic lesion

Changes caused by neuromuscular transmission defect

Needle Axamination Work-Ups

Routine Upper Extremity

Routine Lower Extremity

Peripheral Neuropathy

Anterior Horn Cell

Myopathy

Neuromuscular Transmission

Single fiber EMG

MCD

jitter

The Needle Examination in Certain Disease Entities

Anterior Horn Cell Disease

Root Lesion

Plexus Lesions

Entrapment Neuropathy

Peripheral Neuropathies

Muscle Disease

 

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