Biomaterial Database

Electrophysiological findings in gastrectomized patients with low serum B12. 1977

D Roos

Thirty-eight patients with vitamin B12 deficiency after gastric surgery for a benign peptic ulcer were examined electrophysiologically. Thirteen (34 per cent) had electromyographical signs of peripheral nerve involvement and the amplitude of the sensory potentials of the median nerve at wrist (16 patients) was diminished, whereas sensory and motor conduction velocities were normal. Six patients had clinical signs of polyneuropathy. The electrophysiological findings are compatible with slight loss of myelinated nerve fibres. None of the patients had clinical or electromyographical signs of myopathy.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
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
D011115	Polyneuropathies	Diseases of multiple peripheral nerves simultaneously. Polyneuropathies usually are characterized by symmetrical, bilateral distal motor and sensory impairment with a graded increase in severity distally. The pathological processes affecting peripheral nerves include degeneration of the axon, myelin or both. The various forms of polyneuropathy are categorized by the type of nerve affected (e.g., sensory, motor, or autonomic), by the distribution of nerve injury (e.g., distal vs. proximal), by nerve component primarily affected (e.g., demyelinating vs. axonal), by etiology, or by pattern of inheritance.	Polyneuropathy, Acquired,Polyneuropathy, Critical Illness,Polyneuropathy, Familial,Polyneuropathy, Inherited,Polyneuropathy, Motor,Acquired Polyneuropathies,Acquired Polyneuropathy,Critical Illness Polyneuropathies,Critical Illness Polyneuropathy,Familial Polyneuropathies,Familial Polyneuropathy,Inherited Polyneuropathies,Inherited Polyneuropathy,Motor Polyneuropathies,Motor Polyneuropathy,Polyneuropathies, Acquired,Polyneuropathies, Critical Illness,Polyneuropathies, Familial,Polyneuropathies, Inherited,Polyneuropathies, Motor,Polyneuropathy
D011178	Postgastrectomy Syndromes	Sequelae of gastrectomy from the second week after operation on. Include recurrent or anastomotic ulcer, postprandial syndromes (DUMPING SYNDROME and late postprandial hypoglycemia), disordered bowel action, and nutritional deficiencies.	Postgastrectomy Syndrome,Syndrome, Postgastrectomy,Syndromes, Postgastrectomy
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000200	Action Potentials	Abrupt changes in the membrane potential that sweep along the CELL MEMBRANE of excitable cells in response to excitation stimuli.	Spike Potentials,Nerve Impulses,Action Potential,Impulse, Nerve,Impulses, Nerve,Nerve Impulse,Potential, Action,Potential, Spike,Potentials, Action,Potentials, Spike,Spike Potential
D014805	Vitamin B 12	A cobalt-containing coordination compound produced by intestinal micro-organisms and found also in soil and water. Higher plants do not concentrate vitamin B 12 from the soil and so are a poor source of the substance as compared with animal tissues. INTRINSIC FACTOR is important for the assimilation of vitamin B 12.	Cobalamin,Cyanocobalamin,Cobalamins,Eritron,Vitamin B12,B 12, Vitamin,B12, Vitamin