Electrodiagnostic Examination Flashcards
What are the primary concerns of clinical neurophysiology studies?
Assessment of functional state of PNS
Assessment of cerebral cortical function
The functional state of the PNS entails the use of what by stimulation of selected peripheral nerves while recording the waveforms of their responses?
Nerve Conduction Studies
What records the waveforms generated by selected muscles during voluntary contraction?
Electromygraphy
What are the used for electrodiagnostic examination?
Nerve Conduction Studies (NCS)
Electromyography (EMG)
An NCS is routinely done as part of the clinical examination of suspected disorders of the?
PNS
What is recorded in the nerve conduction study?
Muscle Fiber Depolarization
A NCS determines whether the disorder involves what?
Nerve NMJ Muscle Focal Diffuse
If the disorder involves the diffuse it affects?
Sensory and/or Motor Neurons
Myelin or Axon
What is the ideal role model for detection in the upper limb with NCS?
Median N (mixed sensory and motor)
What are the advantages of doing electrophysiological studies on the median N?
Readily Accessible
Abductor pollicis brevis is readily available for surface or needle EMG.
What is ideal for recording AP traveling antidromically following stimulation?
Sensory NCS of the skin of the index finger
What are the choices for motor nerve conduction in the lower limb?
Extensor Digitorum Brevis
Tibialis Anterior
Adductor Hallicus
Nerve conduction in the lower limb can test what?
Peroneal N Injury
Sural N Testing
What is a technique in which an electrode incorporated into a fine needle is inserted into a muscle in order to sample the depolarization waveforms produced by voluntary contraction?
Electromyography (EMG)
What is denervation of a muscle?
Acute physical injury to the N supply
