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Biomedical subjects

P Larmande

Publications and source records attributed to P Larmande.

18 recordsLinked to original sources
PubMed1979

[Monocular circumduction nystagmus (author's transl)].

Monocular circumduction nystagmus is a very rare ocular movement. A type of circumduction movement, it is caused by successive movements of all the ocular muscles within the framework of a pendular nystagmus. As a monocular movement, it raises the question of the physiopathological mechanism of such a movement which is so complex and is also limited to one eye. The existence of a monocular form of circumduction nystagmus makes it necessary to revise the mechanism of pendular nystagmus.

Adult↗
PubMed1979

[True and false cerebellar oculomotor manifestations (author's transl)].

The oculomotor perturbations of cerebellar affections are numerous. Their localizing value is however extremely variable: It is amongst the abnormalities of refixation that one can find the most typical cerebellar feature: such as dysmetria, macrosquare wave jerks, macrosaccadic oscillations only be seen in cerebellar disease. The ocular static of cerebellar patients is often abnormal, and affected by square wave jerks and pendular nystagmus. However, the abnormalities of cinetics are not specific.

Ataxia↗
PubMed1976

[Vertical vergence pathways].

Two pathways for vertical vergence probably exist: the cortical one carrying a psycho-optical reflex, the other sub-cortical connected to the vestibular apparatus and more probably to the otolith system. The sub-cortical pathway is essentially a vestibulo-cerebellar oculomotor pathway; but in addition there certainly exist direct vestibulo-oculomotor connections and long tracts passing through the interstitial nucleus of Cajal and the reticular formation.

Afferent Pathways↗
PubMedDate not supplied

[Macrosaccadic oscillations in a case of paraneoplastic myoclonic encephalopathy (author's transl)].

Abnormal ocular movements were observed in a patient with myoclonic encephalopathy secondary to branchial carcinoma. Clinical, cinematographic, and oculographic studies demonstrated the presence of rapid, large amplitude, conjugated, horizontal movements which occurred in bursts. They had a tapered appearance and were triggered by fixing vision and jerking movements, while they were abolished by rest and closing the eyelids. These features are similar to those seen in macrosaccadic oscillations. Other types of oscillating ocular movements are discussed as well as the physiopathological features of this disorder.

Aged↗