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Biomedical subjects

B Lechevalier

Publications and source records attributed to B Lechevalier.

119 records · Page 7Linked to original sources
PubMedDate not supplied

[Recurrent familial neuropathy due to compression (author's transl)].

The authors describe a family, of which 13 members had peripheral neuropathy manifesting as episodes of paralysies usually provoked by minor compression of nerve trunks. Nerve and muscle biopsies in two patients, demonstrated many thickenings of the myelin sheath ("tomacula"). Electron microscopy investigations are used as a basis for discussing the origin and place of this affection among other hereditary neuropathies.

Adolescent↗
PubMedDate not supplied

[Neuropsychology of musical identification].

Several neuropsychological observations have suggested that disturbances of the process involved in identifying music is related to lesions of the dominant cerebral hemisphere. The studies have been confirmed by different data from experimental psychology and functional brain imaging techniques. Based on these inference sources we propose different hypotheses to describe the cognitive processes involved in identifying music.

Cognition↗
PubMedDate not supplied

[Perception of musical sounds: contributions of positron emission tomography].

The perception of music is not a single global process. It encompasses the integration into conscience of various elements, such as sound pitch, tone, rhythm and impression of familiarity. Thus, it may be subjected to cognitive studies based on specific and complementary abilities of both cerebral hemispheres in these tasks. A number of selected medical cases reported previously had already suggested anatomic-clinical correlations for the perception of the various components of musical sounds. The left hemisphere subserves rhythm and pitch perception, the sense of familiarity and identification of a musical piece. The right hemisphere plays a part in the perception of tone and melodic line. Position emission tomographic studies in normal subjects have corroborated these assumptions on hemispheric lateralization in musical perception. In addition, they have demonstrated previously unsuspected facts, such as the role of visual areas in pitch perception and the role of frontal cortex and especially of Broca's area in the perception of rhythm.

Auditory Perception↗