Normal Nerve Conduction Studies: Causes & Reasons

Possible Causes for Normal Nerve Conduction Studies

Arquivos de Neuro-Psiquiatria (Sep 2000) Benign monomelic amyotrophy: a study of twenty-one cases Amiotrofia monomélica benigna: estudo de 21 casos Abstract Read online A consecutive series of 21 patients with single limb atrophy (monomelic amyotrophy) is reported. Sixteen had lower limb atrophy and five had[…] [doaj.org]

Polymicrogyria - Ehlers-Danlos Syndrome Type 4

Nerve conduction (NC) study showed evidence of demyelinating motor-sensory neuropathy. Magnetic resonance imaging (MRI) of brain was normal. [neurologyindia.com]

conduction studies: reduction of CMAP of distal muscles, mild axonal sensomotor polyneuropathy Electromyography: mixed pattern of both small (myopathic) and larger (neurogenic [ncbi.nlm.nih.gov]

NC study showed reduced compound muscle action potential in right median (5.52 mV) and ulnar (4.94 mV) nerves with preserved conduction velocity and normal parameters in the [neurologyindia.com]

Fucosidosis Type 1

Nerve conduction study and evoked potentials were normal. [ncbi.nlm.nih.gov]

Metabolic workup (lactate, ammonia, aminoacidogram and organic acids) was normal. 24 h urinary collection for mucopolysaccharides was normal. [ncbi.nlm.nih.gov]

[…] the medial end of radial epiphysis (c), inferior beaking of thoraco lumbar vertebrae (d), widening of the acetabulum (e) Her blood counts, liver and renal functions were normal [ncbi.nlm.nih.gov]

Small-Fiber Neuropathy

Nerve Conduction Studies/Electromyogram studies were unremarkable, and skin biopsy of the right thigh and foot showed low intraepidermal nerve fiber density with normal sweat [ncbi.nlm.nih.gov]

METHODS: Retrospective chart review of patients with sensory symptoms or findings restricted to small nerve fibers and normal nerve conduction studies (NCS) seen in a subspecialty [ncbi.nlm.nih.gov]

METHOD: 122 patients with clinically suspected sensory neuropathy without motor weakness and with normal nerve conduction studies underwent blinded autonomic reflex screening [ncbi.nlm.nih.gov]

Burning Feet Syndrome

Motor nerve conduction and F wave studies of the right median and ulnar nerve were normal. [jnnp.bmj.com]

Nerve conduction studies and EMG of III:33 were normal except for A waves present on F wave recordings from the right tibial nerve. [jnnp.bmj.com]

Sensory nerve conduction studies of the right median, ulnar, and sural nerve were normal except for a slight reduction in amplitude of the ulnar sensory nerve action potential [jnnp.bmj.com]

X-linked Distal Spinal Muscular Atrophy Type 3

conduction study/creatinine phosphokinase (CPK)/chest X-ray Seizures/microcephaly/early joint contracture/hypotonia/raised CPK/normal nerve conduction study (NCS): Congenital [annalsofian.org]

Other Nonspecific Clinical Findings [8] Electromyogram (EMG) usually show myopathic features with normal nerve conduction studies. [physio-pedia.com]

Diagnostic Evaluation • Clinical presentation/Physical examination • Electrodiagnostic studies • Motor nerve conduction study – abnormal ( amplitudes, nml CV) • Sensory nerve [slideshare.net]

Asymmetric Motor Neuropathy

To improve the diagnosis of conduction blocks, electrophysiological studies should include proximal nerve segments using special stimulation techniques. [thieme-connect.com]

Since demyelination in MMN is not as widespread as in chronic inflammatory demyelinating polyneuropathy (CIDP), nerve conduction velocities are often normal. [thieme-connect.com]

Ulnar Nerve Disorder

Cubital tunnel syndrome with false-negative nerve conduction studies treated with wide awake ulnar nerve decompression via the OSWA pathway. [scielo.org.pe]

Ulnar neuropathy with normal electrodiagnosis and abnormal nerve ultrasound. Arch Phys Med Rehabil. 2010; 91(2): 318-320. [ Links ] 27. Bismil QMK, Bismil MSK. [scielo.org.pe]

Ovarioleukodystrophy

(Arg127Lysfs*16)) have normal nerve conduction studies or sensory function on physical examination. [ncbi.nlm.nih.gov]

Nerve conduction studies performed in eight patients revealed normal motor and sensory conduction velocities in all except patient 1 who had delayed conduction velocities [ncbi.nlm.nih.gov]

Cognitive capabilities were normal or mildly impaired. All female carriers were clinically normal. [ncbi.nlm.nih.gov]

Congenital Muscular Dystrophy Type 1A

Nerve conduction studies are normally, while electromyography suggested a myopathic process with early recruitment and decreased amplitude and duration of response. [ncbi.nlm.nih.gov]

In tests the levels of muscle enzymes and results from electromyography (EMG) and nerve conduction studies as well as muscle biopsy studies show up normal. [news-medical.net]

Immunohistochemistry show presence of dystrophin, lack of merosin, also the utrophin is normally expressed. [ncbi.nlm.nih.gov]

CANOMAD Syndrome

Nerve conduction studies of the limbs showed absent bilateral median, ulnar, sural, and left radial sensory responses. F waves were delayed. [hindawi.com]

CSF was acellular, with normal glucose and protein. MRI brain was normal. [hindawi.com]

Spinocerebellar Ataxia with Rigidity and Peripheral Neuropathy

Nerve Conduction Studies: Evidence of a mild left peroneal neuropathy and minimal peripheral neuropathy. [collections.lib.utah.edu]

conduction studies showed normal findings even in patients with hyporeflexia. 2 In contrast, nerve conduction studies disclosed mild sensorimotor peripheral neuropathy with [ams.ac.ir]

Nerve conduction studies were done which did not record bilaterally any compound motor and sensory potential over the distribution of peroneal nerve. [casereports.in]

Axonal Neuropathy

Initial nerve conduction study showed multiple motor conduction blocks in non-compression sites with normal sensory conduction. [annalsofian.org]

Hepatitis E antibodies assessment using enzyme-linked immunosorbent assay method revealed elevated level of IgM (25.7 IU/ml, normal Initial nerve conduction study (NCS) (7 [ncbi.nlm.nih.gov]

Electromyographic studies and nerve conduction studies show normal motor conduction velocity and latency with decreased amplitude of compound muscle action potentials. [en.wikipedia.org]

Diphtheritic Neuropathy

Nerve conduction studies show decreased conduction velocity. [tratamientoneuropatia.com]

Nerve conduction studies and EMG in such cases may be normal and the sural nerve biopsy may be difficult to interpret. The diagnosis can be made with a skin biopsy. [tratamientoneuropatia.com]

It begins in childhood or adolescence and progresses slowly, involving other nerves. It is compatible with a normal lifespan. [tratamientoneuropatia.com]

Multifocal Motor Neuropathy

Sensory nerve conduction studies were minimally abnormal, showing reduced amplitudes with normal velocities. [ncbi.nlm.nih.gov]

Although ulnar nerve conduction studies were normal, there may have been proximal pathology involving the ulnar nerve not demonstrable on standard nerve conduction studies [onlinelibrary.wiley.com]

The presence of probable motor conduction block in 2 or more motor nerve segments with normal sensory nerve conduction studies Exclusion criteria not present OR: Weakness [emedicine.medscape.com]

Proximal Myopathy with Focal Depletion of Mitochondria

Myopathic patterns on electromyography (EMG) were observed in 53 patients (98.1%) among 54 patients who underwent EMG with normal nerve conduction studies. [synapse.koreamed.org]

The patient underwent evoked potential studies of EMG and nerve conduction study, both of which were normal. [onlinelibrary.wiley.com]

Electromyography — In mitochondrial disease, nerve conduction studies may be normal or may be consistent with a myopathy and show predominantly low amplitude compound motor [medilib.ir]

Miller-Fisher Syndrome

Three Miller Fisher patients with preserved limb muscle strength and normal routine nerve conduction studies were included. [ncbi.nlm.nih.gov]

Investigations, including brain imaging, cerebrospinal fluid examination and nerve conduction studies were normal except for elevated serum levels of immunoglobulin G anti-GQ1b [ncbi.nlm.nih.gov]

Motor nerve conduction studies and F-wave latencies are generally normal. [frontiersin.org]

Pure Hereditary Spastic Paraplegia

Upon examination, he was found to have spastic paraparesis, hyperreflexia, clonus of both ankle and knee jerks, and upgoing plantar reflexes, with normal nerve conduction [cags.org.ae]

Serum vitamin B12 was within the normal range. Electromyography and nerve conduction studies were normal. [neurologyindia.com]

conduction studies: Axonal neuropathy Proton MRS of brain: Ribitol & D-Arabitol peaks Serum & CSF: High Ribitol & D-Arabitol Lactate & Pyruvate: Normal Nerve conduction testing [neuromuscular.wustl.edu]

Schwartz-Jampel Syndrome

Electrocardiogram, echo, and thyroid functions were normal. Nerve conduction study and skeletal survey were normal. [neurologyindia.com]

Visually evoked potentials, brainstem auditory evoked potentials, electromyography, and nerve conduction velocity studies were normal in all patients. [ncbi.nlm.nih.gov]

nerves tested. [ncbi.nlm.nih.gov]

Acute Pandysautonomia

Nerve conduction studies were normal. The leg fractures were difficult to heal, and he underwent orthopaedic surgery several times. [jnnp.bmj.com]

The nerve conduction studies play a pivotal role. [ispub.com]

Nerve conduction studies and EMG showed no abnormalities. Right sural nerve biopsy showed a marked loss of small myelinated and unmyelinated fibres. [jnnp.bmj.com]

Spastic Paraplegia - Ataxia - Mental Retardation

Nerve Conduction Studies: Evidence of a mild left peroneal neuropathy and minimal peripheral neuropathy. [repository.countway.harvard.edu]

Serum vitamin B12 was within the normal range. Electromyography and nerve conduction studies were normal. [neurologyindia.com]

Past History: Mentally retarded Seizure disorder since childhood. 1987 Nerve conduction studies and visual evoked potentials normal. 1989 Treated for reactive psychosis Resolved [repository.countway.harvard.edu]

Diazinon Poisoning

Brain magnetic resonance imaging was normal. Nerve conduction studies and EMG with repetitive stimulation were normal. [jnnp.bmj.com]

Median Neuropathy

(B) Left (symptomatic) and right (asymptomatic) median nerve motor conduction studies show left conduction block between palm and wrist with normal distal motor amplitude. [n.neurology.org]

Acute median nerve compression may follow recreational or occupational activities. 1 Selective acute demyelination of the recurrent thenar motor branch of the median nerve [n.neurology.org]

Postoperatively, six of ten patients demonstrated improved nerve conduction studies, although only four patients demonstrated normal test results. [ncbi.nlm.nih.gov]

Distal Hereditary Motor Neuropathy Type 5A

Nerve conduction studies reveal normal sensory responses with reduced or absent motor responses in the upper and lower limbs. [link.springer.com]

The nerve conduction studies (NCS) demonstrated an axonal sensorimotor polyneuropathy ( Table 1 ). [journals.plos.org]

Electrophysiology: nerve conduction studies show: Low conduction velocities ( Normal or only mildly slowed conduction velocities (>38 m/s) and reduced action potential amplitudes [patient.info]

Paroxysmal Exertion-Induced Dyskinesia

Apart from mild jerky postural tremor in the outstretched arms neurological examination was normal. Nerve conduction studies were normal. [doi.org]

Carpal Tunnel Syndrome

We describe the case of a patient who presented with the classic symptoms and neurological examination for CTS, but had a normal nerve conduction study and electromyogram. [ncbi.nlm.nih.gov]

Muscle Nerve 16 : 1392–1414 25 Witt JC et al. (2004) Carpal tunnel syndrome with normal nerve conduction studies. [doi.org]

Carpal tunnel syndrome with normal nerve conduction studies. Muscle & Nerve. Apr 2004;29(4):515-22. [Medline]. Graham B. Nonsurgical treatment of carpal tunnel syndrome. [web.archive.org]

Peroneal Nerve Compression Neuropathy

Serum laboratory studies showed normal values. [healio.com]

Nerve conduction returns to normal only with regeneration Surgery required—guarded prognosis Seddon's classification Neuropraxia Axonotmesis Neurotmesis Nerve conduction studies [academic.oup.com]

He experienced a loss of sensation in the area of the common peroneal nerve. A nerve conduction study was performed. [oandplibrary.org]

Myopathy with Abnormal Lipid Metabolism

Sensory nerve conduction studies are always normal, unless there is a coexistent neuropathy. [clinicalgate.com]

Nerve conduction study was normal. X-ray to rule out protrusio acetabulae and magnetic resonance imaging to look for dural ectasia was not done. [annalsofian.org]

Usually, nerve conduction study findings are normal. [emedicine.medscape.com]

Autosomal Dominant Hereditary Sensory and Autonomic Neuropathy

Electrophysiological studies revealed absent sensory nerve action potential with nearly normal motor nerve conduction studies. [ncbi.nlm.nih.gov]

Electromyography and nerve conduction studies showed that motor nerve conduction and needle electromyography examination of sampled muscles was normal; however, bilateral [jpma.org.pk]

Typically, nerve conduction studies confirm severe impairment of sensory nerve conduction velocities and absent sensory nerve action potentials, but motor nerve conduction [ojrd.biomedcentral.com]

Scapuloperoneal Myopathy

but may in rare cases be as high as eight times the upper limit of normal Nerve conduction studies normal Electromyographic findings that are nonspecific, with occasional [ncbi.nlm.nih.gov]

[…] birth to 3rd decade of life, dilated cardiomyopathy with onset from birth to 2nd decade of life) in one third of patients Serum creatine kinase concentration that is usually normal [ncbi.nlm.nih.gov]