Biomaterial Database

[Determination of the latency for the prognosis of Bell's palsy (author's transl)]. 1976

B Mamoli, and H Neumann

In a previous study the authors discussed the value of the determination of the compound action potential amplitude of the m. orbicularis oris following supramaximal stimuli of the facial nerve for the prognosis of facial paresis. In this study they investigate the suitability of the determination of the latency periods for an early prognosis. The latency periods in 20 normal subjects and 26 patients with idiopathic facial paresis were messured and continuously checked. The study reveals that a difference of more than 0.5 msec. between the latency periods of normal and paretic patients does not even permit the proof of peripheral lesions in patients with partial denervation or absent or insufficient recovery. Ocassionally, even shorter latency were observed in paretic patients, which are probably due to a local increase of the threshold for supramaximal stimuli around the stimulation electrode. The necessary increase of the stimulus intensity probably leads to a nervous excitation further distally. Contrary to the observations of other authors these studies indicate that the determination of the latency does not constitute a useful prognostic criterion for idiopathic facial paresis; for an early prognosis the measurement of latency is less reliable than the determination of the compound action potential amplitude.

UI	MeSH Term	Description	Entries
D009410	Nerve Degeneration	Loss of functional activity and trophic degeneration of nerve axons and their terminal arborizations following the destruction of their cells of origin or interruption of their continuity with these cells. The pathology is characteristic of neurodegenerative diseases. Often the process of nerve degeneration is studied in research on neuroanatomical localization and correlation of the neurophysiology of neural pathways.	Neuron Degeneration,Degeneration, Nerve,Degeneration, Neuron,Degenerations, Nerve,Degenerations, Neuron,Nerve Degenerations,Neuron Degenerations
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
D011379	Prognosis	A prediction of the probable outcome of a disease based on a individual's condition and the usual course of the disease as seen in similar situations.	Prognostic Factor,Prognostic Factors,Factor, Prognostic,Factors, Prognostic,Prognoses
D004558	Electric Stimulation	Use of electric potential or currents to elicit biological responses.	Stimulation, Electric,Electrical Stimulation,Electric Stimulations,Electrical Stimulations,Stimulation, Electrical,Stimulations, Electric,Stimulations, Electrical
D005154	Facial Nerve	The 7th cranial nerve. The facial nerve has two parts, the larger motor root which may be called the facial nerve proper, and the smaller intermediate or sensory root. Together they provide efferent innervation to the muscles of facial expression and to the lacrimal and SALIVARY GLANDS, and convey afferent information for TASTE from the anterior two-thirds of the TONGUE and for TOUCH from the EXTERNAL EAR.	Cranial Nerve VII,Marginal Mandibular Branch,Marginal Mandibular Nerve,Seventh Cranial Nerve,Nerve VII,Nerve of Wrisberg,Nervus Facialis,Nervus Intermedius,Nervus Intermedius of Wrisberg,Cranial Nerve VIIs,Cranial Nerve, Seventh,Facial Nerves,Mandibular Nerve, Marginal,Mandibular Nerves, Marginal,Marginal Mandibular Nerves,Nerve VIIs,Nerve, Facial,Nerve, Marginal Mandibular,Nerve, Seventh Cranial,Nerves, Marginal Mandibular,Nervus Faciali,Seventh Cranial Nerves,Wrisberg Nerve,Wrisberg Nervus Intermedius
D005158	Facial Paralysis	Severe or complete loss of facial muscle motor function. This condition may result from central or peripheral lesions. Damage to CNS motor pathways from the cerebral cortex to the facial nuclei in the pons leads to facial weakness that generally spares the forehead muscles. FACIAL NERVE DISEASES generally results in generalized hemifacial weakness. NEUROMUSCULAR JUNCTION DISEASES and MUSCULAR DISEASES may also cause facial paralysis or paresis.	Facial Palsy,Hemifacial Paralysis,Facial Palsy, Lower Motor Neuron,Facial Palsy, Upper Motor Neuron,Facial Paralysis, Central,Facial Paralysis, Peripheral,Facial Paresis,Lower Motor Neuron Facial Palsy,Upper Motor Neuron Facial Palsy,Central Facial Paralyses,Central Facial Paralysis,Facial Palsies,Facial Paralyses, Central,Facial Paralyses, Peripheral,Palsies, Facial,Palsy, Facial,Paralyses, Central Facial,Paralyses, Facial,Paralyses, Hemifacial,Paralysis, Central Facial,Paralysis, Facial,Paralysis, Hemifacial,Paralysis, Peripheral Facial,Pareses, Facial,Paresis, Facial,Peripheral Facial Paralysis
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013997	Time Factors	Elements of limited time intervals, contributing to particular results or situations.	Time Series,Factor, Time,Time Factor