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{{c1::RADIAL TUNNEL SYNDROME}} radial nerve can be entrapped between the {{c2:: brachialis and BR::2}} c/o {{c4::la...
a needle inserted into muscle should be silent at rest if placed near the NMJ (motor endplate), two waveforms can occ...
Low-Rate Repetitive Stimulation: An abnormality is considered when a CMAP demonstrates >{{c1::10}}% amplitude reduction ...
{{c1::Early recruitment::recruitment pattern}} most commonly seen in myopathic conditions that result in a loss of musc...
median NCSs demyelinating lesion at the carpal tunnel results in {{c1:: prolonged distal latencies }} of both motor...
EMG increased insertional activity may be seen in both {{c1::neuropathic}} and {{c1::myopathic}} conditions
{{c1::10}}% of people with clinical carpal tunnel syndrome (CTS) can have a normal EDX study
{{c1::Collateral sprouting}} is repair in which a neurite sends off axons of an intact motor unit and innervates muscl...
{{c1::Postactivation Facilitation (PAF)}} : After a decrement is noted with LRRS, a 30-60 second {{c2::isometric contrac...
Axillary mono-neuropathy EDX findings : NCS: SNAP {{c1::not available}} CMAP: {{c1::Abnormal (not done)}} EMG: Abnorma...
Radiculopathy In general, CMAP in NCS will be normal * However, in a {{c1::severe radicular}} lesion it may be affected
retrocondylar groove vs CUTS can be localized with the {{c1::inching technique}} this is important * as the former requi...
Somatosensory evoked potential ( SSEP ) monitors for problems such as (a) {{c1::peripheral nerve injuries}} , (b) {{...
{{c1::Phase Cancellation}} = when stimulated, the APs of one axon may be out of sync with neighboring ones when comp...
Inherited Peripheral Neuropathies typically categorized as : {{c1::Hereditary motor and sensory neuropathies (HMSN)}} {{...
{{c1::Wartenberg’s}} sign: Inability to adduct the {{c2::5th digit (palmar interossei::body part/muscle}} weakness)
Paraneoplastic Syndrome can affect the CNS e.g. {{c1::limbic encephalitis (hippocampus and amygdala) }} and paraneoplas...
{{c3::Recruitment frequency (RF)}}: this is defined as the {{c1::Firing Rate}} of the {{c1::1st MUAP}} when {{c1::a 2nd ...
{{c1::Temporal dispersion}} reflects the range of conduction velocities of the fastest and slowest nerve fibers.
Quadriceps Nerve: {{c1::Femoral}} Roots: {{c2:: L2, L3 , L4::3 }}
Note that a mean of {{c1::10 F}} -waves can be used as a surrogate for one H-reflex
Motor unit recruitment. (A) Normal. (B) {{c1::Early (myopathic)}} (C) {{c1::Decreased (neuropathic)}}
Femoral n. innervates (motor) {{c1::Iliacus * (illiopsoas)}} {{c1::Pectineus (1/2)}} {{c1::Sartorius}} {{c1::Quadriceps...
Sciatic Nerve, course (tibial & peroneal) L4, L5 roots from the {{c7::lumbosacral trunk}}, and the 1st, 2nd, and 3rd sa...
In conduction block you will see a decrease in CMAP amplitude with stimulation {{c1::proximal::distal or proximal}} to...
EMG/NCS diagnostic criteria for peripheral neuropathy consists of evaluating at least {{c1::three limbs}}
Botulism treatment {{c1::trivalent ABE antitoxin}} in first {{c2::24}} hours Supportive with intubation for respirator...
In addition to Charcot–Marie–Tooth disease the PMP-22 gene is also implicated in hereditary neuropathy with {{c1::liabil...
In ALS {{c1::bowel}}, {{c1::bladder}}, and {{c1::sensation}} are spared
Radial n. injury at spiral-groove EDX findings : NCS: CMAP: normal at {{c1::all 3 sites::stim site}} in conduction block...
Median Motor study (APB) suspect RCA if CMAP... {{c1::median}} n. stim at the wrist/elbow: reduced or absent {{c1::ulna...
SAPHENOUS NEUROPATHY Etiology can be entrapped in the {{c2::hip adductor canal}} (aka {{c2::Hunter’s canal}}) or between...
Ddx Foot Drop {{c1::Central: Tumor, cerebrovascular accident (CVA), arteriovenous malformation (AVM), spinal cord injury...
EMG Special Studies Small nerve fiber abnormalities and associated {{c1::autonomic}} dysfunction may not be seen wit...
{{c6::Axonal}} Peripheral Neuropathy ddx (broad categories) {{c5::HMSN-II::inherited disorder}} {{c1::Heavy metals: Le...
EMG for Dx r adiculopathy abnormal findings in {{c1::two or more::#}} muscles innervated by the same {{c2::spinal ne...
In MG MSR are {{c1::normal}} In LEMS MSR are {{c1::abnormal}}
LEMS pathophys disorder of neuromuscular transmission due to an autoimmune response against the voltage gated {{c1::P/Q...
Flexor carpi radialis Nerve: {{c1::Median}} Nerve Roots: {{c2:: C6 , C7 ::2 }}
{{c1:: Dorsal ulnar cutaneous ( DUC ) }} nerve: arising 8 cm proximal to {{c2::Guyon’s canal}}
GUYON’S CANAL clinical presentation (1) {{c1::deep palmar motor}} (2) {{c2::deep palmar motor and hypothenar mo...
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CNS disorders Edx Findings In CNS disorders, sensory and motor NCSs are normal. On needle EMG, there is no denervation o...
EMG for Dx r adiculopathy Ideally, {{c1::6}} muscles ( {{c1::5}} peripheral muscles + {{c2::paraspinals}} ) should ...
Differential Diagnosis of a Wrist Drop {{c5::Central: SCI/TBI/CVA, etc.}} {{c2::Radiculopathy: C6 or C7::2}} {{c4::Plexo...
Concentric needle advantages less {{c1::interference}}
motor neuron disease {{c1::PLS , primary lateral sclerosis }} {{c2:: Hereditary spastic paraplegia }} portion of motor...