Biomaterial Database

Suprascapular nerve conduction: a comparative analysis in normal subjects. 1998

B A Casazza, and J L Young, and J P Press, and A W Heinemann

Department of Physical Medicine and Rehabilitation, Rehabilitation Institute of Chicago, Northwestern University Medical School, Illinois, USA.

An electromyographic examination is often utilized to confirm the diagnosis of suprascapular neuropathy in patients with shoulder pain and dysfunction. The purpose of this study was to compare three compound motor action potential (CMAP) recording methods (surface electrode, monopolar needle, concentric needle) for evaluating suprascapular nerve conduction. Twenty-two normal, healthy subjects were tested with each method. Differences between the recording methods were noted for CMAP latencies and amplitudes with the monopolar needle recordings having the shortest mean latency and greatest mean amplitude. The monopolar needle recordings also appeared to give a more reproducible measurement of CMAP latency and evoked amplitude to the supraspinatus and infraspinatus. Therefore, it may be more accurate to use a monopolar needle to record suprascapular nerve conduction and determine abnormalities with a side-to-side latency difference of 0.4 ms being acceptable. Considering the diverse branching of the suprascapular nerve, and the monopolar needle's relatively small sampling area of motor fibers, it may be prudent to test conduction to multiple sites within these muscles for the most accurate assessment.

UI	MeSH Term	Description	Entries
D007839	Functional Laterality	Behavioral manifestations of cerebral dominance in which there is preferential use and superior functioning of either the left or the right side, as in the preferred use of the right hand or right foot.	Ambidexterity,Behavioral Laterality,Handedness,Laterality of Motor Control,Mirror Writing,Laterality, Behavioral,Laterality, Functional,Mirror Writings,Motor Control Laterality,Writing, Mirror,Writings, Mirror
D008297	Male		Males
D009431	Neural Conduction	The propagation of the NERVE IMPULSE along the nerve away from the site of an excitation stimulus.	Nerve Conduction,Conduction, Nerve,Conduction, Neural,Conductions, Nerve,Conductions, Neural,Nerve Conductions,Neural Conductions
D010525	Peripheral Nerves	The nerves outside of the brain and spinal cord, including the autonomic, cranial, and spinal nerves. Peripheral nerves contain non-neuronal cells and connective tissue as well as axons. The connective tissue layers include, from the outside to the inside, the epineurium, the perineurium, and the endoneurium.	Endoneurium,Epineurium,Perineurium,Endoneuriums,Epineuriums,Nerve, Peripheral,Nerves, Peripheral,Perineuriums,Peripheral Nerve
D011930	Reaction Time	The time from the onset of a stimulus until a response is observed.	Response Latency,Response Speed,Response Time,Latency, Response,Reaction Times,Response Latencies,Response Times,Speed, Response,Speeds, Response
D012016	Reference Values	The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality.	Normal Range,Normal Values,Reference Ranges,Normal Ranges,Normal Value,Range, Normal,Range, Reference,Ranges, Normal,Ranges, Reference,Reference Range,Reference Value,Value, Normal,Value, Reference,Values, Normal,Values, Reference
D001917	Brachial Plexus	The large network of nerve fibers which distributes the innervation of the upper extremity. The brachial plexus extends from the neck into the axilla. In humans, the nerves of the plexus usually originate from the lower cervical and the first thoracic spinal cord segments (C5-C8 and T1), but variations are not uncommon.	Plexus, Brachial
D004576	Electromyography	Recording of the changes in electric potential of muscle by means of surface or needle electrodes.	Electromyogram,Surface Electromyography,Electromyograms,Electromyographies,Electromyographies, Surface,Electromyography, Surface,Surface Electromyographies
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man